JPS6348800A - Cooling plate of ferrite load radio frequency accelerator - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a cooling plate for use in a ferrite-loaded high-frequency accelerator for a heavy ion syntron.

(Prior Art) A ferrite-loaded high-frequency accelerator for a heavy ion synchrotron is shown in the schematic diagram in Fig. 2 and the cross-sectional view in Fig. 3 (view taken along the line m-■ in Fig. 2). The acceleration gap (1) that generates a high-frequency acceleration voltage is sandwiched between the inner cylinders ■ and ■ from both sides in the axial direction, and both ends of the inner cylinders ■ and ■ are short-circuited with the outer cylinder ■, and both the inner cylinders ■ and c2) and the outer cylinder ■ There are multiple ring-shaped ferrite (A) (magnetite (Fe, 04) between 3 and 3).
A complex oxide containing iron ions, which is hard and brittle and manufactured as a high-temperature sintered body using a powder metallurgy method, is installed, and a cooling plate (c) is sandwiched between each ferrite plate. (A plurality of (four in the case of Fig. 3) bias windings (■) are wound in a figure-8 shape around 0. Note that (8) is the transition gland of the bias winding, and (■) is the joint of the cooling plate. , and the refrigerant (
(generally using water).

When a current is passed through the bias winding ■ in such a device, i /
Resonance of four wavelengths occurs in the acceleration gap ■, and the ion beam 0) is accelerated as shown by the arrow. At this time, the variability of the resonance frequency of the high-frequency accelerator can be realized by utilizing the variability of the high-frequency characteristics of ferrite (2). That is, when the bias N'& is changed, the magnetic permeability of the ferrite changes, so this characteristic is utilized.

Bias winding ω is made of inner cylinder ■ and ferrite with cooling plate 0
The wiring is routed through the gap between the outer periphery of the ferrite 0 with a cooling plate and the outer cylinder ■.

Ferrite for a high-frequency accelerator constructed in this way (a)
With the desire to widen the frequency modulation range of the accelerating ion beam, ferrites with high initial magnetic permeability are desired, so the Curie temperature at which the characteristics of ferrite itself electrically change rapidly tends to decrease. Furthermore, since the characteristics of ferrite are strongly temperature dependent, it is necessary to maintain the temperature at a nearly constant level during operation.

For this purpose, a cooling plate (2) is sandwiched between the ferrite (4).

The conventional cooling plate (■) is shown in FIGS. 4(a) and (b).

Two hollow heat conductors (io) (generally steel pipes with a rectangular cross section are used) are placed on the inner circumference with an angular range of 360°.
While winding the two hollow thermal conductors (10) in a spiral shape around the tapered end fitting (11) so as to shift the two hollow thermal conductors (10) by one pitch,
After forming the refrigerant into an annular shape, a joint (12) is brazed to the refrigerant supply port and the refrigerant discharge port, respectively. The end fitting (11) is provided with a passage (13) for returning a refrigerant (generally water) and is fixed liquid-tightly to the hollow conductor (10) by brazing.

The hollow thermal conductors (10) on the inner and outer sides of the conventional cooling plate 0 are spiral-shaped and have irregular external dimensions over the entire circumference, and when the cooling plate is sandwiched between ferrites (4), the bias Since the gap between the bias winding ω and the winding ω is not constant, it is necessary to take measures against high-frequency discharge during assembly, and the bias winding ω
It is necessary to change the dimensions of the bias winding depending on the position of the bias winding, and it has to be formed with an unnecessary margin depending on the location. Therefore, the device becomes large and productivity decreases. Furthermore, since the tip fitting (11) is manufactured to be tapered over a 360° angle range, it is large in size and requires a skilled worker, which also has the drawback of reducing productivity.

(Problems to be Solved by the Invention) As described above, the conventional device has unnecessary parts, is large in size, and has a long tip fitting, reducing productivity.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cooling plate in which unnecessary parts of a ferrite-loaded high-frequency accelerator can be reduced and productivity can be increased.

[Structure of the invention]

(Means for Solving the Problems) In the present invention, the end fitting is wound in a tapered spiral shape within an angle range of 90° to form a passage for returning the refrigerant, so that it is liquid-tightly connected to the two hollow heat conductors. The two hollow heat conductors are fixed together and wound into a spiral shape to form a cooling plate.

(Function) By doing this, the end fitting can be shortened from the conventional 3606 to about 90@, and each turn of the hollow heat conductor is made into a concentric arc shape over 3/4 of the circumference, so it can be used in a ferrite-loaded high-frequency accelerator. When assembled, only the approximately 90° angle portion will protrude, but by attaching the bias winding to avoid this 90° portion, a uniform bias winding can be used and unnecessary gaps can be avoided. The ferrite-loaded high-frequency accelerator can be miniaturized with good productivity without the provision of such a device.

(Example) Below, an embodiment of the present invention will be described.5 FIG. 1(a) shows one embodiment of the present invention.

This will be explained with reference to (b) and (c). The apparatus using this cooling plate is shown in FIGS. 2 and 3, so please also refer to them.

In this embodiment, the end fitting (11) (in this case, a copper plate) is wound in an IB spiral shape over an angle range of about 90° to form a passage (13) for returning the refrigerant, and two hollow The heat conductors (1o) are overlapped in the radial direction, the hollow part of the hollow heat conductor (10) is communicated with the passage (13), and the heat conductors (1o) are brazed and fixed in a liquid-tight manner. Incidentally, as shown in FIG. 1(C), a passage (13) is also provided at the end portion of the hollow thermal conductor (10). The two hollow heat conductors (10) (in this case, steel pipes with a rectangular cross section) are spirally wound so that the outer diameter is approximately the same as the outer diameter of the ferrite (see Figure 2). Then, a fitting (12) for supplying and discharging a refrigerant (generally water) is brazed to the tip. Then, each turn is also brazed to form a cooling plate (2) so as not to destroy the shape. Note that the material of the hollow thermal conductor does not need to be copper, as long as it is a good thermal conductor. The passage (13) for returning the refrigerant is 2
It may be formed only on either the hollow thermal conductor (10) of the book or the tip fitting (11). Next, the effect will be explained.

One of the two joints (12) serves as a refrigerant supply port, and the other serves as a refrigerant discharge port, and by supplying and discharging the refrigerant, the ferrite (υ) is maintained at a predetermined temperature. , only the angular range of about 90° where the end fitting is provided is in the shape of an eccentric circular arc, and the remaining angular range of about 270° is in the form of a concentric circular arc.Therefore, avoid the eccentric circular arc-shaped part and install the bias winding in the concentric circular arc-shaped part. By arranging , there is no need to provide unnecessary margin between the bias winding ■ and the ferrite with cooling plate, and the size can be reduced.Also, the length of the tip fitting (11) is about 1/4 of the conventional one. , manufacturing is easy and productivity is improved.

〔Effect of the invention〕

As explained above, according to the present invention, Ferai! - Make the approximately 1/4 circular arc part of the cooling plate sandwiched between the two sides eccentric.

Since the remaining approximately 3/4 circular arcs are made concentric, the bias windings can be placed in the concentric circular arc sections, and countermeasures against discharge due to high frequency are uniform, and cooling is achieved to obtain a load high frequency accelerator for the compact and highly productive Ferrite 1. A board is obtained.

[Brief explanation of the drawing]

FIGS. 1(a), (b), and (c) are a plan view, a cross-sectional view, and an enlarged cross-section of essential parts showing an embodiment of the present invention. FIG. 2 is a schematic diagram of a ferrite-loaded high-frequency accelerator x'j showing common parts using cooling plates of the conventional and one embodiment of the present invention;
FIG. 3 is a cross-sectional view taken along the line I---------------------------------------- in FIG. 2, and FIGS. 4(a) and 4(b) are a plan view and a side view of a conventional cooling plate. ]... Acceleration Giyoung, 2... Inner brief. 3...Outer cylinder, ,F, ,, Ferrite 5ite, 5...Cooling plate. 6... Ferrite with cooling plate, 7... Bias winding, 10... Hollow thermal conductor,
11... Tip metal fitting, 13... Passage.

Claims (1)

[Claims] An acceleration gap that generates a high-frequency acceleration voltage is sandwiched between inner cylinders from both sides in the axial direction, both ends of the inner cylinder are short-circuited with an outer cylinder, and a plurality of ring-shaped ferrites are installed between both inner cylinders and the outer cylinder. In the cooling plate of a ferrite-loaded high-frequency accelerator in which a cooling plate is sandwiched between each ferrite and a plurality of bias windings are wound around the ferrite with the cooling plate, the cooling plate is made by stacking two hollow heat conductors in the radial direction. It has a tip fitting that is wound in a spiral shape and has an inner diameter tapered to an angle range of about 90 degrees, and a passage for returning the refrigerant is provided in at least one of the two hollow heat conductors and the tip fitting. A cooling plate for a ferrite-loaded high-frequency accelerator, characterized in that a joint for supplying and discharging a refrigerant is provided at the end of the winding on the outer diameter side.