CN116364529A - Method for preparing ion trap needle electrodes - Google Patents

Abstract

The invention discloses a method for preparing a needle-shaped electrode of an ion trap. The method includes: inserting and fixing a metal rod into a first through hole on the top end surface of a shielding bucket; moving a slider on a slide rail downward, Make the metal rod immerse and stay in the solution in the reaction barrel as the shielding barrel moves downward; connect the metal rod and the cathode terminal to the positive pole of the power supply and the negative pole of the power supply respectively, so that the metal rod is in the solution Electrochemical corrosion occurs; after the metal bar is corroded by the solution and breaks, the slider on the slide rail is moved upwards, so that the remaining part of the metal bar is removed from the solution with the upward movement of the shielding barrel, thereby taking out the Another part of the metal rods dropped into the reaction barrel due to the above corrosion and fracture is used as the needle electrode for the ion trap. The invention can improve the preparation precision of the ion trap needle electrode to meet the working requirements of the ion trap quantum computer.

Description

Method for preparing ion trap needle electrodes

technical field

The invention relates to the technical field of quantum computing, in particular to the technical field of ion trap quantum computers, in particular to a method for preparing ion trap needle electrodes.

Background technique

An ion trap is a device that traps and traps ions (that is, charged atoms or molecules) within a certain range by using an electric field or a magnetic field, and can be used to realize a quantum computer. There are many types of ion traps in which an electric field in a needle ion trap or a quadrupole ion trap can be applied to the ions through needle electrodes. As a device that directly acts on ions in the ion trap, the ion trap quantum computer has very high requirements on the length of the needle-shaped electrode (needle for short) and the preparation accuracy of the needle-tip structure, because only the needle-shaped electrode with high preparation precision can be better. It satisfies the working requirements of the ion trap quantum computer.

However, the existing process of preparing needle-shaped electrodes by electrochemical corrosion is cumbersome and difficult to control, resulting in low precision of the needle-shaped electrodes formed by corrosion, and it is difficult to meet the use requirements of ion trap equipment in terms of surface smoothness and shape standardization, etc. .

Contents of the invention

Aiming at the existing technical problems, the invention proposes a method for preparing ion trap needle electrodes.

The embodiment of the present invention proposes a method for preparing a needle-shaped electrode of an ion trap, which is based on a preparation device, and the preparation device includes: a reaction barrel, a shielding barrel, a shielding barrel support, a cathode assembly and a cathode mounting column, a shielding barrel support and The cathode installation columns are respectively arranged on both sides of the outside of the reaction barrel, wherein the shielding barrel support includes vertically arranged slide rails and sliders, the shielding barrel is fixedly connected to the slider, and the opening of the shielding barrel is facing downward to the opening of the reaction barrel , the top end face of the shielding barrel has a first through hole for the metal rod to pass through; the cathode assembly includes interconnected cathode terminals and cathode rings, and the cathode mounting column has a cathode mounting piece extending laterally toward the reaction barrel, the cathode The ring is installed on the cathode mounting part through the cathode terminal and immersed in the solution contained in the reaction barrel; the method includes: S10, inserting and fixing the metal rod into the first through hole on the top end surface of the shielding barrel; S20, move the slider on the slide rail downwards, so that the metal bar is immersed in and stay in the solution in the barrel as the shielding barrel moves downward; S30, connect the metal bar and the cathode terminal to the positive pole of the power supply and The negative pole of the power supply is connected, so that the metal rods are electrochemically corroded in the solution; S40, after the metal rods are corroded by the solution and broken, move the slider on the slide rail upwards, so that the remaining part of the metal rods With the upward movement of the shielding barrel, it is removed from the solution, thereby taking out another part of the metal rod that has fallen into the reaction barrel due to the corrosion and fracture as the needle electrode for the ion trap.

Optionally, the preparation device further includes a positioning rod and a needle support plate vertically fixed on the lower end of the positioning rod, and the top end surface of the shielding barrel also has a second through hole for the positioning rod to pass through; Including: adjusting the depth of the positioning rod inserted into the shielding barrel, so as to drive the needle support plate at the lower end of the positioning rod to reach the target depth from the top end surface of the shielding barrel; wherein, in S10, pass the metal bar through the first through hole Insert into the shielding barrel, and when the lower end of the metal rod reaches the needle pole support plate, fix the metal rod into the first through hole.

Optionally, an upwardly protruding annular post is provided on the needle support plate, and the annular post is located directly below the first through hole on the top end surface of the shielding barrel; the method further includes: when the lower end of the metal bar When reaching the needle pole supporting plate, align the lower end of the metal bar with the annular boss to calibrate the verticality of the metal bar.

Optionally, the inner diameter of the annular boss decreases from top to bottom.

Optionally, a needle collecting bucket is provided on the needle supporting plate, the needle collecting bucket opens upwards, and the needle collecting bucket is located below the first through hole; wherein, in S40, when the metal rod is corroded by the solution, the After the fracture, move the slider on the slide rail upwards, so that the remaining part of the metal rod and the needle support plate are removed from the solution with the upward movement of the shielding barrel, so as to take out the needles that have fallen to the needle due to the corrosion and fracture. Another part of the metal rod in the collection bucket acts as a needle electrode for the ion trap.

Optionally, a positioning nut is sleeved on the positioning rod, and a hollow annular external thread column is formed upward along the hole of the second through hole on the top end surface of the shielding barrel, and a longitudinal opening is formed on the annular external thread column; The method further includes: after the needle pole supporting plate at the lower end of the positioning rod reaches the target depth, tightening the annular external threaded column through the positioning nut to shrink the inner diameter of the annular external threaded column through the opening, so that the annular external threaded column hugs the positioning rod , to fix the lower end of the positioning rod at the target depth.

Optionally, a spring is sleeved on the positioning rod, one end of the spring is connected to the upper end of the positioning rod, and the other end of the spring is connected to the positioning nut, and the spring supports the positioning rod on the top end surface of the shielding bucket through the positioning nut so that the needle A predetermined distance is maintained between the pole supporting plate and the lower edge of the shielding bucket.

Optionally, the slider of the shielding bucket support is an electric slider or a pneumatic slider, and the height and/or the lifting speed of the slider on the slide rail are adjusted by the controller of the electric slider or the pneumatic slider.

Optionally, the upper end of the cathode installation column is also provided with a limiting plate extending laterally toward the reaction barrel; wherein, in S40, after the metal rod is corroded by the solution and fractures, the slider on the slide rail is moved upward , so that the remaining part of the metal rod and the needle support plate are removed from the solution with the upward movement of the shielding barrel. When the upper end of the positioning rod reaches the limit plate, the slider on the slide rail is continuously moved upward, so that the shielding barrel Continue to move up relative to the positioning rod until the lower edge of the shielding barrel is higher than the predetermined distance from the needle tray, so as to take out another part of the metal rod that has fallen into the needle tray due to the corrosion and fracture as an ionizer. well needle electrode

Optionally, the cathode assembly further includes a cathode terminal nut sleeved on the cathode terminal, and the cathode terminal is connected to the negative electrode of the power supply through the cathode terminal nut.

The invention can greatly improve the preparation precision of the ion trap needle electrode to meet the working requirements of the ion trap quantum computer.

Description of drawings

Below, preferred embodiment of the present invention will be described in further detail in conjunction with accompanying drawing, wherein:

Fig. 1 schematically shows the flow chart of the method for preparing ion trap needle electrode according to the embodiment of the present invention;

Fig. 2 schematically shows a structural diagram of a preparation device applied to the method shown in Fig. 1 according to an embodiment of the present invention;

Fig. 3 is a sectional view along A-A of the structure shown in Fig. 2;

Fig. 4 is a partial enlarged view at C in the structure shown in Fig. 3;

Fig. 5 schematically shows the depth relationship diagram of multiple structures of the preparation device of the embodiment of the present invention;

Fig. 6 is a structural diagram of the positioning rod and the needle support plate in the structure shown in Fig. 3;

Fig. 7 is a partial enlarged view at B in the structure shown in Fig. 6;

8-11 schematically show the process diagrams of manufacturing the needle-shaped electrode by using the method for manufacturing the needle-shaped electrode of the ion trap according to the embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In the following detailed description, reference is made to the accompanying drawings which illustrate specific embodiments of the invention which form a part hereof. In the drawings, like reference numerals describe substantially similar components in different views. Various specific embodiments of the present invention are described in sufficient detail below, so that those of ordinary skill in the art can implement the technical solution of the present invention. It is to be understood that other embodiments may be utilized or structural, logical or electrical changes may be made to the embodiments of the present invention.

An embodiment of the present invention provides a method for preparing a needle-shaped electrode of an ion trap, which is based on a preparation device, which includes: a reaction barrel, a shielding barrel, a shielding barrel support, a cathode assembly and a cathode mounting column, a shielding barrel support and a cathode The mounting columns are respectively arranged on both sides of the outside of the reaction barrel, wherein the shielding barrel support includes vertically arranged slide rails and sliders, the shielding barrel is fixedly connected to the slider, and the opening of the shielding barrel is facing downward toward the opening of the reaction barrel. There is a first through hole for the metal bar to pass through on the top end face of the shielding barrel; the cathode assembly includes interconnected cathode terminals and cathode rings, and the cathode mounting posts have a cathode mounting piece extending laterally toward the reaction barrel, and the cathode ring Mounted on the cathode mount via the cathode terminal and submerged in the solution contained in the reaction barrel.

Fig. 1 schematically shows a flow chart of a method for preparing an ion trap needle electrode according to an embodiment of the present invention, the method includes the following steps:

S10, inserting and fixing the metal rod into the first through hole on the top end surface of the shielding barrel.

S20, moving the slide block on the slide rail downwards, so that the metal rod is immersed in and stays in the solution in the reaction barrel along with the downward movement of the shielding barrel.

S30, connecting the metal rod and the cathode terminal to the positive electrode and the negative electrode of the power supply respectively, so that the metal rod is electrochemically corroded in the solution.

S40, after the metal bar is corroded by the solution and fractures, move the slider on the slide rail upwards, so that the remaining part of the metal bar is removed from the solution as the shielding barrel moves upwards, thereby removing the metal bar caused by the corrosion and Another part of the metal rod that breaks and falls into the reaction barrel serves as a needle electrode for the ion trap.

Using the method for preparing the needle-shaped electrode of the ion trap proposed by the embodiment of the present invention to prepare the needle-shaped electrode can improve the preparation accuracy of the needle-shaped electrode. Specifically, inserting the metal rod into the shielding bucket can reduce the adverse effect of the bubbles generated by the cathode on the corrosion of the metal rod; in addition, setting the cathode as a cathode ring structure is beneficial to the concentration of hydroxide ions in the solution during the corrosion process. Uniform distribution, further improving the circumferential symmetry of the needle pole, avoiding the shape disorder caused by the uneven concentration of the solution; using the slider to continuously fine-tune the height of the metal rod during the corrosion process, for example, by setting different rising or falling rates , can prepare needle-shaped electrodes with different tapers, and further improve the precision of preparing needle-shaped electrodes.

In some embodiments of the present invention, optionally, the preparation device further includes a positioning rod and a needle support plate vertically fixed on the lower end of the positioning rod, and the top end surface of the shielding barrel also has a second hole for the positioning rod to pass through. through holes; before S10, the method shown in Figure 1 also includes: adjusting the depth of the positioning rod inserted into the shielding bucket, to drive the needle pole supporting plate at the lower end of the positioning rod to reach the target depth; in S10, passing the metal bar through The first through hole is inserted into the shielding barrel, and when the lower end of the metal rod reaches the needle pole supporting plate, the metal bar is fixed into the first through hole.

The combination of the needle support plate and the positioning rod can be used to finely control the depth of the metal rod inserted into the shielding barrel. When in use, the opening of the shielding barrel is downward, that is, it is buckled upside down in the solution. By adjusting the depth of the positioning rod inserted into the shielding barrel, The height of the needle supporting plate at the lower end of the positioning rod can be adjusted. After the metal rod is vertically placed in the shielding bucket, when the metal bar touches the needle supporting plate, its height is limited, so that the metal rod The height of the material immersed in the solution is precisely controlled, so that a needle-shaped electrode that meets the requirements can be produced after the reaction is completed. In the embodiment of the present invention, the combination design of the needle pole supporting plate and the positioning rod is ingenious, flexible in regulation and convenient in operation, and can meet the high preparation precision requirement of the ion trap needle electrode.

Optionally, an upwardly protruding annular boss is provided on the needle supporting plate, and the annular protrusion is located directly below the first through hole on the top end surface of the shielding barrel; when the lower end of the metal bar reaches the needle supporting plate , Align the lower end of the metal bar with the ring boss to calibrate the verticality of the metal bar.

For example, the annular boss is a hollow shell with a certain height, and the annular boss is located directly below the first through hole. Then, when the metal rod is installed, the metal rod extends through the first through hole For the shielding barrel, move the metal bar down, and after its lower end reaches the position of the annular boss, place the lower end of the metal bar into the annular boss, so that the axis of the metal bar can be vertically downward, that is, The metal bar is pointed in the vertical direction for the purpose of squareness calibration. When the metal rod is immersed in the solution, the metal rod can be perpendicular to the liquid surface of the solution, so that the prepared needle electrode is more symmetrical, which can reduce the possibility of bending the needle tip of the needle electrode and improve the preparation accuracy of the needle electrode. In particular, the accuracy of the needle tip of the needle electrode can be improved.

Among them, the verticality refers to the verticality of the metal rod relative to the liquid surface of the solution. The verticality affects the shape of the metal rod corrosion fracture. The metal rod is perpendicular to the liquid surface of the solution, and the shape of the corrosion fracture can be uniform and symmetrical. .

In some embodiments of the present invention, optionally, the inner diameter of the annular boss gradually decreases from top to bottom along the axial direction of the annular boss, so that metal rods with different diameters can be placed in the central position of the annular boss , to complete the process of verticality calibration, which is applicable to the verticality calibration of metal bars of various sizes.

In some embodiments of the present invention, optionally, a needle collecting barrel is provided on the needle supporting plate, the needle collecting barrel opens upward, and the needle collecting barrel is located below the first through hole; in S40, the metal rod After the material is corroded by the solution and breaks, move the slider on the slide rail upwards, so that the remaining part of the metal rod and the needle support plate are removed from the solution as the shielding bucket moves upwards, so as to remove the metal rods caused by the corrosion and Another part of the metal rod that breaks and falls into the needle collection bucket serves as the needle electrode for the ion trap.

The needle collection bucket can catch the needle electrode that falls off after the metal rod is corroded and broken, so that after the needle electrode is prepared, the shielding bucket can be taken out of the solution, and the prepared needle can be taken out directly from the needle collection bucket. There is no need to look for the dropped needle-shaped electrode in the reaction barrel containing the solution, so as to prevent the needle-shaped electrode from being corroded by the solution, which helps to improve the accuracy of preparing the needle-shaped electrode.

In some embodiments of the present invention, optionally, a positioning nut is sleeved on the positioning rod, and a hollow annular externally threaded column is formed upward along the hole of the second through hole on the top end surface of the shielding barrel, and the annular externally threaded column A longitudinal opening is formed on the top; the method shown in Figure 1 also includes: after the needle pole support plate at the lower end of the positioning rod reaches the target depth, tighten the annular external threaded column through the positioning nut to shrink the inner diameter of the annular external threaded column through the above opening , so that the annular external threaded column tightly embraces the positioning rod, so as to fix the lower end of the positioning rod at the target depth.

As an example, the end face of the shielding barrel has an annular external threaded column, the annular external threaded column is arranged around the edge of the second through hole, the positioning rod is inserted in the annular threaded column and the second through hole, and the positioning nut is sleeved on the annular threaded On the column, when the positioning nut is tightened on the annular external thread column, the positioning rod is held tightly by the annular external thread column to be fixed at the current height. Correspondingly, when the positioning nut is not tightened to the annular external thread column, the positioning rod together with the needle pole supporting plate can move up and down in the second through hole.

In some embodiments, optionally, the side of the annular threaded post has a longitudinal opening, and as the positioning nut is tightened, the inner diameter of the annular threaded post decreases to hold the positioning rod tightly, thereby fixing the positioning rod at the current position.

In some embodiments of the present invention, optionally, a spring is sleeved on the positioning rod, one end of the spring is connected to the upper end of the positioning rod, the other end of the spring is connected to the positioning nut, and the spring is connected to the top end surface of the shielding barrel via the positioning nut. The upper pair of positioning rods form a support so that a predetermined distance is maintained between the needle support plate and the lower edge of the shielding bucket.

A spring is arranged between the upper end of the positioning rod and the positioning nut, which can support the positioning rod and prevent the positioning rod from sliding down and falling off during adjustment. Optionally, the length of the spring can be set according to the following requirements. The length of the spring makes the needle pole support plate near the edge of the opening of the shielding barrel when the positioning rod is in a free state (that is, the positioning nut is not tightened). The reason for this setting is that, first of all, the components in the equipment can be compacted, which is convenient for maintenance; more importantly, before the electrochemical corrosion starts, it is necessary to loosen the positioning nut to lower the positioning rod so that the needle support plate is no longer in contact Metal bar, to prevent the extrusion force between the needle support plate and the metal bar from affecting the shape of the needle pole. It should be noted that the needle support plate should not move down excessively and away from the lower opening of the shielding barrel. If the needle support plate If the distance between the plate and the lower edge of the shielding barrel is too large, it may cause the lower part (needle) of the bar to fail to fall accurately into the needle collecting barrel on the needle supporting plate (for example, the needle may fall from the shielding barrel drift away in the space between the edge and the pin holder).

It can be seen that setting the spring on the positioning rod can not only allow the needle supporting plate to drop to separate from the metal bar, but also support the needle supporting plate from being far away from the shielding barrel, so that the control purpose can be realized without excessive intervention of the operator, and the control logic It is simple, the operation process is not cumbersome, and the related parts are ingeniously designed, easy to implement in technology, and low in maintenance costs.

In some embodiments of the present invention, optionally, the slider of the shielding bucket support is an electric slider or a pneumatic slider, and a hydraulic cylinder can also be used to control the slider. When moving the slider, the slider is adjusted by the slider controller Height and/or lift speed on slide rails.

In the embodiment of the present invention, the controller of the lifting slider can adopt electric control, for example, a motor is installed on the slider, and the controller controls the lifting speed of the slider by controlling the operation of the motor, thereby controlling the lifting of the shielding barrel and the bar speed. In addition, the lifting slider can also be controlled by a hydraulic oil cylinder or pneumatically, or can be controlled by other known methods, all of which can realize the control of the slider.

In some embodiments of the present invention, optionally, the upper end of the cathode installation column is also provided with a limiting plate extending laterally toward the reaction barrel; Move the slider on the slide rail so that the remaining part of the metal rod and the needle support plate move out of the solution with the upward movement of the shielding barrel. When the upper end of the positioning rod reaches the limit plate, continue to move upward on the slide rail the slider, so that the shielding barrel continues to move up relative to the positioning rod until the lower edge of the shielding barrel is higher than the predetermined distance from the needle tray, so as to take out another part that has fallen into the needle tray due to the corrosion and fracture Metal rods serve as needle electrodes for the ion trap.

The limit plate designed in the embodiment of the present invention is located above the positioning rod, which can facilitate the staff to take out the needle-shaped electrode in the needle collection bucket in time. The operation process is simple and not cumbersome, and the steps requiring the operator's assistance are few, which can reduce the operation. The burden on personnel to operate and regulate equipment.

In some embodiments of the present invention, optionally, the cathode assembly further includes a cathode terminal nut sleeved on the cathode terminal, and the cathode terminal is connected to the negative electrode of the power supply through the cathode terminal nut.

Various implementations of the method for preparing the ion trap needle electrode according to the embodiment of the present invention have been described above through multiple embodiments. The operation process of the embodiment of the present invention is described below through multiple specific examples.

As an example, FIG. 2 schematically shows a structural diagram of a preparation device applied to the method shown in FIG. 1 according to an embodiment of the present invention. Fig. 3 is a sectional view along A-A of the structure shown in Fig. 2 . Wherein, the needle electrode preparation device 100 includes a base 101 , a reaction barrel 102 , a shielding barrel 103 , a slide rail 104 , a cathode assembly 105 and a cathode installation column 106 . Wherein, reaction barrel 102 is arranged on the central area of base 101, is used for containing solution 130, and slide rail 104 and cathode installation column 106 are erected on the base of reaction barrel 102 both sides respectively, and the upper end of cathode installation column 106 is installed with limiting plate 109. Wherein, a slide block 107 is arranged in the track of the slide rail 104 , the shielding barrel 103 is installed on the slide block 107 through the shielding barrel bracket 112 and the shielding barrel 103 is located above the reaction barrel 102 . Under the control of the slider controller, the slider 107 drives the shielding bucket to move up or down. The opening of the shielding barrel 103 faces the reaction barrel 102 , and the metal rod 108 is inserted into the first through hole 1031 in the central area of the top surface 1033 of the shielding barrel 103 .

Fig. 4 is a partial enlarged view of C in the structure shown in Fig. 3 . 2-4, the preparation device 100 of the needle electrode also includes a positioning rod assembly, the positioning rod assembly includes a positioning rod 121 and a needle pole supporting plate 122 vertically fixed on the lower end of the positioning rod 121, and the top end surface 1033 of the shielding barrel 103 There is also a second through hole 1032 on the top, the positioning rod 121 passes through the second through hole 1032 so that the positioning rod 121 is movably installed in the shielding barrel 103, the size of the needle pole supporting plate 122 is smaller than the inner diameter of the shielding barrel 103, and the positioning rod 121 drives the needle support plate 122 to move in the axial direction to adjust the insertion depth of the metal rod 108 into the shielding barrel. After the insertion depth of the positioning rod 122 is determined, the positioning rod 121 can be fixed on the top end surface 1033 by the positioning nut 124. Specifically, the positioning rod 122 is inserted in the second through hole 1032, and on the edge of the second through hole 1032 along the Axially protruding from the second through hole 1032 is an annular externally threaded column 129. The outer surface of the annular externally threaded column 129 has threads, and the inner surface of the positioning nut 124 has threads. By tightening the positioning nut 124, the annular externally threaded column 129 and the The positioning rod 121 is tightly hugged, so that the positioning rod 121 is fixed on the top end surface 1033 of the shielding barrel 103 .

Fig. 5 schematically shows the depth relationship diagram of multiple structures of the preparation device according to the embodiment of the present invention.

As shown in Figure 5, as an example, using the positioning rod and the needle support plate to locate the depth of the metal bar inserted into the shielding barrel, the following steps can be performed:

Step 101: According to the depth H that the metal rod 108 needs to be inserted into the solution 130, calculate the depth H' of inserting the metal rod 108 into the shielding barrel 103, where H'=H+(H1-H2), H1 is the top end surface 1033 of the shielding barrel To the height of the base 101, H2 is the height of the liquid level of the solution 130 in the reaction barrel 102 to the base 101;

Step 102: According to the calculated depth H' of inserting the metal bar 108 into the shielding bucket 103, adjust the depth of the positioning rod 121 inserted into the shielding bucket 103, so that the insertion depth of the positioning rod 121 is equal to H', and fix the positioning rod 121 with the positioning nut 124 ;

Step 103: Insert the metal rod 108 into the shielding bucket 103 through the first through hole and move it downward;

Step 104: When the bottom end of the metal bar 108 touches the needle supporting plate 122, it means that the insertion depth of the metal bar 108 is equal to the insertion depth of the positioning rod 121, that is, the insertion depth of the metal bar 108 is equal to H' at this time, Fix the metal rod 108 .

It can be seen that using the positioning rod 121 and the needle support plate 122 can accurately and efficiently determine the depth H' of inserting the metal bar 108 into the shielding barrel 103, and then adjust the height of the shielding barrel 103 according to the depth at which the metal bar 108 is inserted into the shielding barrel 103 And the height of the solution 130 can accurately determine the insertion depth of the metal rod 108 into the solution, and the insertion depth is the target depth. Because the position where the metal rod 108 breaks is the position where the metal rod 108 intersects the liquid surface, if the insertion depth of the metal rod 108 into the solution 130 can be determined, then a needle-shaped electrode equal to the preset length can be prepared. The needle-shaped electrode preparation device proposed in the embodiment of the present invention can accurately insert the metal rod into the solution to a preset depth, so the length of the prepared needle-shaped electrode can be precisely controlled, and the occurrence of length deviation of the needle-shaped electrode can be reduced , improve the preparation accuracy.

3 and 4, the cathode mounting column 106 has a cathode mounting piece 110 extending laterally toward the reaction barrel 102, and the cathode mounting piece 110 is fixed on the cathode mounting column 106 by a holder 113. The cathode mounting piece 110 is used To fix the cathode assembly 105. Cathode assembly 105 comprises interconnected cathode terminal 1051 and cathode ring 1052, and cathode ring 1052 is installed on the cathode mount 110 by cathode terminal 1051, and wherein, the outer diameter of cathode ring 1052 is less than the internal diameter of reaction barrel 102, and cathode ring 1052 The inner diameter of the cathode ring 1052 is larger than the outer diameter of the shielding barrel 103, and the cathode ring 1052 is concentric with the shielding barrel 103. In some embodiments, optionally, the cathode assembly 105 further includes a cathode terminal nut 1055 , a cathode support 1053 and a cathode insulating sleeve 1054 . The cathode mounting part 110 is provided with a mounting hole 1101, the cathode insulating sleeve 1054 is fixed in the mounting hole 1101, the cathode terminal nut 1055 is sleeved on the cathode terminal 1051, and is located above the cathode insulation sleeve 1054, the cathode terminal nut 1055 is connected to the power supply The negative poles of the cathodes are connected, and the power is conducted to the cathode ring 1052 through the cathode terminal 1051 . The cathode bracket 1053 is sleeved on the cathode terminal 1051 between the cathode mounting part 110 and the cathode ring 1052. Optionally, the end surface of the cathode bracket and the cathode ring can be fixedly connected by a connector, and the cathode bracket is fixedly connected to the cathode connector. The cathode support 1053 is used to realize the fixed connection between the cathode ring 1052 and the cathode mounting part 110, and can also isolate the cathode terminal 1051 from the solution to prevent the cathode terminal 1051 from contacting the solution.

Fig. 6 is a structural schematic diagram of the positioning rod and the needle support plate in the structure shown in Fig. 3 . Fig. 7 is a partial enlarged view of B in the structure shown in Fig. 6 . Wherein, the needle supporting plate 122 has an annular protrusion 127 protruding axially along the needle supporting plate 122 , and the bottom surface of the annular protrusion 127 is the upper surface of the needle supporting plate 122 . The position of the annular protrusion 127 corresponds to the position of the first through hole 1031 on the top end surface of the shielding bucket 103 . In this example, the annular protrusion 127 is located directly below the first through hole 1031 , and the axis extension of the annular protrusion 127 coincides with the axis of the first through hole 1031 and is perpendicular to the liquid surface of the solution 130 . When the metal bar 108 is installed, the verticality of the metal bar 108 is corrected by using the annular boss 127 .

Referring to Fig. 6 and Fig. 7, a needle collecting barrel 125 is also provided on the upper surface of the needle supporting plate 122, the needle collecting barrel 125 opens upward and has a certain height, and the inner diameter of the needle collecting barrel 125 is larger than the outer diameter of the metal bar , the needle collection bucket 125 is located right below the first through hole 1031 . The diameter of the annular protrusion 127 is smaller than the diameter of the needle collection barrel 125, and the annular protrusion 127 is arranged at the center of the bottom surface of the needle collection barrel 125, and the axes of the two coincide. When preparing the needle-shaped electrode, the needle-shaped electrode dropped after the metal rod is corroded and broken can fall into the needle-collecting bucket 125, so that after the needle-shaped electrode is prepared, the shielding bucket 103 is taken out from the solution, and can be directly Take out the prepared needle electrode from the needle collection barrel 125, without looking for the dropped needle electrode in the reaction barrel containing the solution, avoiding the needle electrode being continuously corroded by the solution and affecting the accuracy and shape of the needle tip of the needle electrode .

Referring to Fig. 7, the side surface of the needle collection barrel 125 is also provided with a drain opening 1251, and the liquid discharge opening 1251 communicates with the bottom surface of the needle collection barrel 125, so that the solution that enters the needle collection barrel can be drained when the shielding barrel leaves the solution. Drain to prevent the needle electrode dropped in the needle collection barrel from continuing to contact with the solution and affecting the accuracy and shape of the needle tip of the needle electrode.

3 and 6, the upper end of the positioning rod 121 has an end cap 128, the spring 123 is sleeved between the end cap 128 and the positioning nut 124, one end of the spring 123 is connected to the end cap 128, and the other end of the spring 123 is connected to the end cap 128. The positioning nuts 124 are connected, and the existence of the spring 123 can support the positioning rod 121, and the positioning rod 121 will not slide down when the positioning nut 124 is not tightened. Further, the length of the spring 123 can be set so that when the positioning nut 124 is not tightened, the needle support plate 122 is located near the lower edge of the shielding barrel 103 .

Referring to Fig. 4, the metal bar 108 is fixed on the top end surface 1033 of the shielding barrel through an anode assembly, and the anode assembly includes: an anode terminal 214, an anode terminal nut 211, an anode insulating sleeve 213 and a rod clamping nut 210, wherein the anode insulation The sleeve 213 is a hollow cylindrical structure, fixed in the first through hole 1031, the anode insulation sleeve 213 is made of insulating material, and a groove 2131 is opened on the outer surface of the anode insulation sleeve 213 along the circumference of the anode insulation sleeve, The axial width of the groove 2131 matches the axial thickness of the top end surface of the shielding barrel, so that the edge of the first through hole 1031 is clamped in the groove 2131, so that the anode insulating sleeve 213 is fixed on the top surface 1033 superior. The anode terminal 214 is inserted into the anode insulating sleeve 213 . In some embodiments, optionally, the anode terminal 214 is a hollow columnar structure, and is connected to the anode insulating sleeve 213 through threads. In addition, a rod clamping nut 210 is provided on the top of the anode terminal 214, and a longitudinal opening is provided on the side of the anode terminal 214, and the opening enables the rod clamping nut 210 to shrink when the top of the anode terminal 214 is tightened. The diameter of the top, to which the metal bar 108 is clamped. The bar clamping nut 210 is arranged on the top of the anode terminal, the metal bar 108 passes through the bar clamp nut 210 and the anode terminal 214 into the shielding barrel 103, and tightens the anode terminal through the bar clamp nut 210 The top of 214 makes the metal rod 108 that determines the insertion depth confined on the top end surface 1033 of the shielding barrel 103 . The anode connection nut 211 is sleeved on the anode connection post 214 between the rod clamping nut 210 and the anode insulation sleeve 213 . When preparing the needle electrode, the anode terminal nut 211 is connected to the positive pole of the power supply, and conducts electricity to the metal rod through the anode terminal, so that the metal rod inserted into the solution is energized and electrochemically corroded.

8-11 schematically show the process diagrams of manufacturing the needle-shaped electrode by using the method for manufacturing the needle-shaped electrode of the ion trap according to the embodiment of the present invention.

As shown in Figures 8-11, as an example, using the ion trap needle-shaped electrode preparation device 100 according to the embodiment of the present invention to prepare the needle-shaped electrode, the following operations can be performed:

(1) Bar installation and positioning. The depth at which the metal bar 108 is inserted into the shielding barrel 103 is positioned by using the positioning rod assembly. Firstly, the sliding block 107 is controlled to rise, and the shielding bucket 103 is driven to completely rise above the liquid level of the solution. According to the length of the prepared needle electrode, adjust the depth to which the positioning rod 121 is inserted into the shielding barrel 103, so that the needle support plate 122 is fixed at a proper position, and the positioning nut 124 is tightened. Then the metal rod 108 is inserted into the anode terminal 214, so that the bottom end of the metal rod 108 contacts the pin pole supporting plate 122, and at the same time, it is ensured that the lower end of the metal rod 108 is put into the annular boss 127, so that The metal bar 108 is perpendicular to the horizontal plane, and the verticality calibration is completed, after which, the bar clamping nut 210 is tightened.

(2) The needle pole supporting plate is reset. Unscrew the positioning nut 124, and the spring 123 provides an upward supporting force for the positioning rod 121. At this time, the needle pole supporting plate 122 at the lower end of the positioning rod 121 is located near the lower edge of the shielding barrel 103, and the needle pole supporting plate 122 and the The metal rod 108 separates in preparation for electrochemical corrosion.

(3) Prepare the needle pole. The slider controller controls the slider 107 to move downward, driving the shielding barrel 103 and the metal rod 108 to immerse in the solution of the reaction barrel 102, and stops when reaching a required height. At this point the cathode ring 1052 has been immersed in the solution. After the DC power supply is switched on, the electrochemical reaction starts, and the metal bar 108 is corroded. During the corrosion process, when necessary, the height and displacement speed of the shielding barrel 103 and the metal bar 108 are fine-tuned by controlling the slider. The purpose is to use " The necking effect" enables the metal rod 108 to corrode in a desired state at the liquid surface, so that the desired needle tip taper can be obtained after corrosion. After the metal rod 108 breaks, the lower half falls into the needle collection barrel 125, that is, the prepared needle electrode. After the metal rod 108 breaks, the corrosion circuit is naturally disconnected, and the electrochemical reaction ends.

(4) Up sampling. After the corrosion circuit is disconnected from the power supply, the slider 107 can rise automatically, driving the shielding barrel 103, the positioning rod 121 and the needle pole supporting plate 122 to rise together, and when the upper end of the positioning rod 121 reaches the limit plate 109, the positioning rod 121 and the needle pole support plate 122 rise together. The pole support plate 122 cannot continue to rise, and the shielding bucket 103 can still continue to rise, so that the needle collection bucket 125 is exposed from the bottom of the shielding bucket 103. The product is taken out.

To sum up, using the above at least one embodiment of the present invention has the following advantages:

1. The length of the metal rod inserted into the solution can be precisely controlled through the positioning rod and the needle support plate, so as to accurately control the length of the prepared needle electrode.

2. The verticality of the metal bar can be calibrated through the annular convex post on the needle support plate, which can improve the circumferential symmetry of the prepared needle electrode.

3. The use of a ring-shaped cathode ring can make the concentration of hydroxide ions in the solution evenly distributed during the corrosion process, further improve the circumferential symmetry of the needle, and avoid the disorder of the shape of the needle due to uneven concentration of the solution.

4. Using the slider, the height of the metal bar can be continuously fine-tuned during the corrosion process, and needles of different sizes can be produced by setting different rising or falling rates.

5. After the needle breaks, it can automatically control the needle-shaped electrode product to rise out of the solution, avoiding excessive corrosion of the needle-shaped electrode product due to human error.

6. The setting of the limit plate can eject the needle pole support plate from the shielding barrel, which is convenient for taking out the needle pole products and simplifies the operation.

The above-described embodiments are only for illustrating the present invention, rather than limiting the present invention. Those of ordinary skill in the relevant technical field can also make various changes and modifications without departing from the scope of the present invention. Therefore, all Equivalent technical solutions should also belong to the scope of the disclosure of the present invention.

Claims (10)

1. A method for preparing an ion trap needle electrode, characterized in that, it is based on the preparation device, and the preparation device includes: reaction barrel, shielding barrel, shielding barrel support, cathode assembly and cathode mounting post, shielding barrel support and the cathode installation column are respectively arranged on both sides of the outside of the reaction barrel, wherein, The shielding barrel support includes vertically arranged slide rails and sliders. The shielding barrel is fixedly connected to the slider. The opening of the shielding barrel is downwards to face the opening of the reaction barrel. The first through hole; the cathode assembly includes a cathode terminal and a cathode ring connected to each other, the cathode mounting column has a cathode mounting piece extending laterally toward the reaction barrel, the cathode ring is installed on the cathode mounting piece through the cathode terminal and is immersed in the reaction barrel In the solution contained in it; The methods include: S10, inserting and fixing the metal rod into the first through hole on the top end surface of the shielding barrel; S20, moving the slider on the slide rail downwards, so that the metal bar is immersed in and stays in the solution in the barrel as the shielding barrel moves downward; S30, connecting the metal bar and the cathode terminal to the positive pole and the negative pole of the power supply respectively, so that the metal bar is electrochemically corroded in the solution; S40, after the metal bar is corroded by the solution and fractures, move the slider on the slide rail upwards, so that the remaining part of the metal bar is removed from the solution as the shielding barrel moves upwards, thereby removing the metal bar caused by the corrosion and Another part of the metal rod that breaks and falls into the reaction barrel serves as a needle electrode for the ion trap. 2. The method according to claim 1, characterized in that, the preparation device also includes a positioning rod and a needle pole support plate vertically fixed on the lower end of the positioning rod, and the top end surface of the shielding barrel is also provided with a pin for the positioning rod to pass through. through the second through hole; The method further includes: adjusting the depth at which the positioning rod is inserted into the shielding bucket, so as to drive the needle support plate at the lower end of the positioning rod to reach the target depth from the top end surface of the shielding bucket; Wherein, in S10, insert the metal rod into the shielding barrel through the first through hole, and fix the metal rod into the first through hole when the lower end of the metal rod reaches the needle supporting plate. 3. The method according to claim 2, wherein an upwardly protruding annular post is provided on the needle supporting plate, and the annular post is located directly below the first through hole on the top end surface of the shielding barrel; The method further includes: aligning the lower end of the metal bar with the annular boss to calibrate the verticality of the metal bar when the lower end of the metal bar reaches the pin support plate. 4. The method according to claim 3, wherein the inner diameter of the annular boss decreases gradually from top to bottom. 5. The method according to claim 2, wherein a needle collection bucket is provided on the needle support plate, the needle collection bucket opens upward, and the needle collection bucket is located below the first through hole; Among them, in S40, after the metal rod is corroded by the solution and fractured, the slider on the slide rail is moved upward, so that the remaining part of the metal rod and the needle support plate are removed from the solution as the shielding bucket moves upward. Removed, thereby taking out another part of the metal rod that fell into the needle collection bucket due to the corrosion and fracture as the needle electrode for the ion trap. 6. The method according to claim 2, wherein a positioning nut is sleeved on the positioning rod, and a hollow annular external thread column is formed upward along the hole of the second through hole on the top end surface of the shielding barrel, and the annular outer thread A longitudinal opening is formed on the threaded post; The method further includes: after the needle pole support plate at the lower end of the positioning rod reaches the target depth, tightening the annular external threaded column through the positioning nut to shrink the inner diameter of the annular external threaded column through the opening, so that the annular external threaded column is tightly hugged Position the rod to secure the lower end of the rod at the target depth. 7. The method according to claim 6, wherein a spring is sleeved on the positioning rod, one end of the spring is connected to the upper end of the positioning rod, the other end of the spring is connected to the positioning nut, and the spring is placed on the shielding barrel via the positioning nut. The positioning rod is supported on the top end surface so as to maintain a predetermined distance between the needle support plate and the lower edge of the shielding barrel. 8. The method according to claim 1, wherein the slider of the shielding barrel support is an electric slider or a pneumatic slider, and the height of the slider on the slide rail is adjusted by the controller of the electric slider or the pneumatic slider and/or lifting speed. 9. The method according to claim 2, characterized in that, the upper end of the cathode installation column is also provided with a limiting plate extending laterally toward the reaction barrel; Among them, in S40, after the metal rod is corroded by the solution and fractured, the slider on the slide rail is moved upward, so that the remaining part of the metal rod and the needle support plate are removed from the solution as the shielding bucket moves upward. Move out, when the upper end of the positioning rod reaches the limit plate, continue to move the slider on the slide rail upwards, so that the shielding bucket continues to move upward relative to the positioning rod, until the lower edge of the shielding bucket is higher than the predetermined distance from the needle support plate , so as to take out another part of the metal rod that fell into the needle tray due to the corrosion and fracture as the needle electrode for the ion trap. 10. The method according to claim 1, wherein the cathode assembly further comprises a cathode terminal nut sleeved on the cathode terminal, and the cathode terminal is connected to the negative electrode of the power supply through the cathode terminal nut.

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