DE2135439A1 - Device with a hnienformigem electron beam - Google Patents

Description

Device with a linear electron beam

The invention relates to devices with linear or straight electron beams to improve the efficiency and service life of Electron bundling power tubes and in particular, however not exclusively, on the creation of a robust, temperature change-resistant electron beam device for operation with reduced potentials in a high frequency vacuum power tube with speed modulation »

There are different types of high frequency vacuum power tubes, which use electron beams with high density and high velocity electron streams, e.g. Speed modulation tubes of traveling waves · and Klystron type. In such devices, the generation and acceleration of the electron beam takes place in one Cathode-anode area, whereupon the beam enters a separate area in which the kinetic energy of the Partially used to amplify high-frequency electrical

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magnetic vibrations is used · With many initial Constructions of such tubes get the electron beam, which still has a fairly high kinetic Energy has, out of the high frequency interaction structure and is in a third area as heat in a Collector electrode consumed »which is kept at the same potential in relation to wetness» as the interaction build-up · The power dissipated as heat directly causes a low operating efficiency, which is why the use additional performance in connection with special »in many cases complex and spatially large fluid cooling devices required to keep the temperature of the collector at an acceptable operating level. th. The electrons impinging on the inside of such a collector at high speed generate in In many cases, there is also intensive X-ray radiation, which is a heavy and complex shield for health protection reasons make necessary.

It has been shown that the overall efficiency is more like this Cathode ray tubes can be increased considerably by using specially designed electron beam collector devices are used »which are considerably below the potential of the high frequency interaction arrangement lying potentials are operated. Such collector devices are included as collector devices reduced potential and enabled an improved utilization of the total kinetic energy of the Electron beam. In addition, the greatly reduced heating of the collector results in a considerably lower output consumed for cooling the collector and simple air cooling systems form a sufficient one in many cases Replacement for the previously required complicated liquid cooling systems ο The generation of X-rays is also reduced »thereby reducing

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the shield against the destructive properties of these Radiation is made possible

The collector with reduced potential inherently results in a number of generally conflicting and difficult requirements "which make it difficult to achieve a satisfactory and inexpensive construction. There is a large electrical potential difference between the high-frequency interactions arrangement of the tube and the collector with reduced potential so that sufficient high-voltage insulation must be created between these two elements. The electrical insulation arrangement must provide a heat path with low temperature impedance from the core of the collector to the outer heat sink for smooth tenting.The metal and insulator parts of the collector system are exposed to high temperature gradients and high temperature gradient swirls or changes in temperature. Repeated cycles from the zero state to the state with a high thermal operating gradient must be able to be endured «if the vacuum tube is to have satisfactory operating properties over a long service life both in manufacture and in use, due to the problems mentioned above. The rupture of the connections zwiechen the insulator and metal parts occurs due to temperature changes during operation or due to simple mechanical shocks during transportation or the incorporation frequently ₀

A device according to the invention with a linear or rectilinear Electron beam includes beam shaping devices, drawing exchanged with the electron beam in Bnergi « High-frequency holding arrangements, at a distance from that

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Hollow electron beam collector devices arranged in high frequency circuit arrangements with an axially extending inner surface for trapping the electrons and an axially extending outer surface, the electron beam shaping device and the radio frequency holding assembly holding vacuum housing devices and flexible holding devices for holding the Electron beam collactor device within the vacuum housing device, wherein the flexible mounting device is fixed to the outer surface and to the vacuum housing device is fixed in heat exchange »

The present invention may Isur creating a robust electron Kollektorvorriehtung of the type with lowered potential for use in Gesohwindigkeitsmodulation vacuum tubes "such as traveling wave tubes and klystron be well utilized in other power tubes with electrons bundling to improve their Betriebswirkwngsgrades" ^The: is beam collector vicarious preferably used at potentials below the potential of the high frequency interaction arrangement of the cathode ray tube "so that a considerable part of the kinetic energy" remaining in the electron beam when exiting the high frequency interaction area can be recovered instead of being lost as heat. The electron beam collector device is preferably constructed from arrangements of ceramic and metallic elements "which are connected to one another in such a way that there are reduced shear forces on the ceramic-metal connections" and that a long-life operation of the vacuum tube arrangement is accordingly achieved.

The invention is illustrated below with reference to in the drawing illustrated embodiments explained in more detail.

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-5- 2135433

In the drawing, j

Fig. X is an explanatory drawing showing the device Circuit diagram;

Pig «2 a cross section« of the more detailed the

shows novel components of the device;

FIG. 3 is a view similar to FIG. 2

modified embodiment.

Fig. 1 shows eoh'ematisoh an electron beam type of a speed modulation tube « which forms the device according to the present invention «where the company * connection connections are shown. Although Fig * 1 sohematlsoh a comfort modulation tube of the type Helically coupled traveling wave tube shows that other known high-frequency elements can be identified with slower Wave propagation for the helical high frequency interaction circuit It should also be recognized that other types of high frequency interaction postures can be used The cavity resonator systems characteristic of the klystron can be used for the helix include one such alternative arrangement for example, in U.S. Patent 3,172,004 1st *

In Fig. 1, a filament 1 causes the surface of the emitter cathode or electron beam shaping device to be heated 2 by an electrical current flowing from an electrical source or battery · The cathode 2 becomes with the aid of a cathode supply source 4 on one negative potential held with respect to earth · Corresponding

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is a line-shaped rectilinear electron beam 5 with usually circular symmetrical property through a Opening projected in a grounded anode 6 · The beam 4 runs continuously in an energy-exhausting relationship a grounded hooli frequency energy exchange Qh maintenance prevention or Wendel 7, the respective entrance and exit * aneussuss 8 and 9 has »Duroh the helix 7 running Electrons are after the energy exchange with the wandering High frequency fields within the helix 7 duroh one Electrode collected, which the electron beam collector device 10 formed This arises as a result of the fact that the device 10 is at a potential which is considerably higher than the earth potential of the coil 7 with the help of an electrical collector potential source 11 is lowered, with one side of the potential source 11 over a line 14 to the collector 10 and the other side via a line 12 to a connection point 13 between the cathode supply source 4 and the cathode 2 are connected is·

Ale example for the operational potentials * for the enterprise a traveling wave tube that encloses the novel electron beam collector «can the cathode 2 operated at approximately -9000 V with the anode 6 and the coil 7 and the collector electrode are at ground potential 10 is about 4500 V. The electrical potential values are only given as representative examples and are not necessarily intended to be border or Optimal values for the operation of a traveling wave tube, one Describe klystrons or another power tube with beam * focusing according to the invention.

Pig, 2 shows in detail the collector 10 as well as the in structure arranged in the vicinity »One with an opening

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A separate diaphragm 20 can be used as a separation of the old and new Parts of the device according to the invention are considered « As generally described in U.S. Patent 3,172,004 is "the diaphragm 20 and parts on the left side of the diaphragm 20" such as the vacuum housing 19 are common Parts "of which it can be seen that they are arranged in the usual catfish as in traveling wave amplifiers" The Portions on the right side of the diaphragm 20 form the novel features of the device. It is asu realize that an opening 21 with the axis-of the electron beam 5 after Fig. 1 is aligned and that the beam 5 after interacting with the high frequency fields, such as with those within the helix 7 according to Flg. 1 through the opening according to Flg. 2 and gets into collector 10 «

The electron beam 5 is in practice through the generally symmetrical inner walls of a core 22 of the hollow Electron beam collector device 10 braked or caught «with these inner walls cooperating therewith» axially aligned and axially extending Inner sections are provided, which form wall parts 22a, 22b, 22c and 22d. The core 22 may be made of a material such as e.g. oxygen-free copper must be made. The wall part 22a has the shape of a truncated cone · Sr is at its end with the smaller Durohmesser with the circular-cylindrical Wall part 22b connected. The wall part 22b is then over the short, tapered step part 22c with the second circular-cylindrical wall part 22d connected. The distant The end of the wall part 22d is closed "

The captured electron beam current is derived from the hollow core 22 via the lead wire 14, which is also can be made of copper and the one with! Ulfe can be any of the various known suitable devices at 14a with

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connected to the outer end of the cores 22, the current collected is derived, as suggested in connection with FIG bid 60 f> the voltage applied to cathode 2 «

The progressively decreasing diameter of the calibration axially extending wall parts 22a * 22b and 22d enable that each such wall part has substantially the same fraction of the total electron beam current receives "Thus, the portions of all of the remaining kinetic energy of the electron beam 5 'which at the Wall parts 22a, 22b and 22d are converted into heat "essentially the same" As a result, this heat is distributed relatively evenly along the length of the core 22 "

The core 22 is supported in an outer jacket or generally cylindrical vacuum housing wall 24 which also made of metal, such as oxygen-free copper 1st «One end of wall 24 is through the diaphragm 20 closed "which is sealed on the circumference with the wall 24, for example by an annular, hard-soldered connection 26 is.

A deep-drawn, bowl-shaped metal end wall or cap is vacuum welded to the opposite or outer end of the wall 24 by means of an annular brazed Connection 27 attached «The cap 25 has a sufficient Volume for receiving the collector line 14, which is formed with a right-angled bend and from the Inside the cap 25 protrudes through an insulator 29. The insulator 29 Ιεβ & α. from any of the various to the Available ceramic materials with good high-voltage insulation properties sound formed «the one vacuum

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tight seal with the metal of the cap 25 on the annular Can form connection 20 »The conductor wire 14 is sealed in the same way within a hole in the insulator 29 on the surface 28. Though others Materials that can be used, certain nickel-chromium alloys for the cap 25 have proven to be brewable proven »because they can be processed by deep drawing and because they are vacuum-tight seals in a simple manner form with ceramic materials »

From the above it can be seen that the outer wall 24, the cap 25 and the insulator 29 complete the vacuum housing assembly of the high frequency tube assembly Wall 24 has additional significant punctures as they are used to Support of the core 22 with the help of devices contributes to a high-voltage electrical insulation along radial Low thermal impedance heat flow paths from core 22 to wall 24 result as will be -β below ear will live. To dissipate this heat, the wall 24 can, for example, have an enlarged, flat or in other catfish shaped part 31 are provided on the can be attached to a suitable heat sink »It will be understood that alternative external heat sink arrangements can be used in a simple manner by a person skilled in the art. It can also be seen that the wall 24 in such a way is arranged in an advantageous manner that in essentially all parts of the collector system within the Located inside this wall and therefore not accessible are where the likelihood of injury to persons from electrical shock or the likelihood of injury mechanical damage to the collector parts is decreased *

The warning is given directly in radial ways from the outer cylindrical surface 34 of the core 22 with the help of a

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Series of generally circular "outwardly extending" apertured cooling fins 32, 33, 33a ..... 33d derived from »where the ribs 33» 33a · «·. 33d at substantially equal intervals on the surface

34 are fastened by brazing »The rib 32 has a different type and is formed in one piece from oxygen-free copper with a separate input section 35 of the core 22» with the electron beam input section 35 provided with an opening being brazed at a connection point 36 with the core 22 "After the electron beam 5 passes through the opening 21 in the diaphragm 20", it can strive to spread "due to space charge effects, while it passes through the somewhat larger opening 37 of the input section

35 and runs into the interior of the core 22 "

The ribs 32 »33» 33a »33b» 330 and 33d act as flexible Haiterungsvorrichtungen, wherein the ribs 33 to 33b in generally have the same structure o Typisoh for the the latter group of ribs can be seen in the rib 33a is because it has an inner disc-shaped portion 38 in the general shape of a truncated cone a conical shell, the base of the conical shell being attached to the surface 34. the conical sohale reduces its diameter in a direction away from the high frequency reciprocal effect » As noted further above, the edge 39 of the disk-shaped portion 38 brazed to the surface 34 of the core 22 · The ribs 33a to 33d are in similarly shaped and attached and may have drilled holes "such as hole 40" in rib 32 " The hole 4o allows air to flow out of the interior of the collector 10 »when the vacuum tube the Finishing during manufacture runs durohl * At

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a preferred embodiment of the invention is located the hole 40 only in the rib 32 and other devices result in the other desired outflow channels For example, a longitudinal slot can be milled into the surface 34 of the core 22 for this purpose be, the slot 41 extending from the vicinity of the end of the core 22 holding the line 14 to a inner part of the tube extends "during the off" pumping by reaching hole 40. The slot 41 has the general appearance of a keyway like this one, for example could be milled into a machine shaft «about the use of a key to secure a gear or a pulley »

second set of seven generally similar ribs with openings "which are also made of sour" made of material-free copper «extends from the inner cylindrical surface 24 of the jacket wall 24 inwards "to help hold the core 22" but does not touch the surface 34 of this core 22.- The Inner diameter of an opening 43 », for example in a typical rib 42 ″ is considerably larger than the outer diameter of the core 22 ″, resulting in a considerable electrical free space between the core 22 and the rib 42 results. In addition, for the arrangement of the flexible retaining ribs 42 »42a« 42b «42o, 42d» 42e and 42f the collar-shaped part 44 of the rib 42 is typical of the has the general shape of a truncated cone of a conical shell «with the outer circular edge of the Part 44 is brazed or otherwise attached to the inner wall surface 24a. The sohale-shaped Rib parts 44 can be provided with drilled holes «as is typically done by the Looh 45

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are shown in the rib 42, to facilitate evacuation of the vacuum housing of the tube, including the interior de? Cap 25 during manufacture. The ribs 42, 42a to 42f are substantially equally spaced along the turning surface 24a and interlock with the assembly that consists of the ribs 32, 33, 33a to 33d consists of “the separation between adjacent ones that extend inwards and outwards Ribs is essentially the same "

These equal distances are outside Shot from at a distance arranged planar insulator rings 46, 46a, 46b to 46k with essentially the same thickness between the ebensei The parallel wall parts of the inwardly and outwardly extending rib arrangements are determined by the rings 46 bis 46k can be formed from any of the various ceramic materials available that are good have electrical insulation properties and suitable mechanical and thermal properties and the one can form permanent impact-resistant connection with the copper sheet, from which the ribs of the two rib arrangements are made "

For example, the annular ring 46 has flat sides a representative element of the fin-insulator-fin assembly The ring 46 may be made from an alumina ceramic material or from certain other well known materials refractory oxide materials such as beryllium oxide The annular flat sides 50a, 50b of the ring 46 are made using a conventional metal plating process plated with nickel. The surface 50a is on the flat annular face of the after rib 42 extending inside. On the other hand, the rib 32 extending close to the outside is on the upper

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area 50b arranged «Additional usual heating and other Brackets are designed to provide permanent, mechanically sound connections to surfaces 30a and 50b to create between the ceramic ring 46 and the respective ribs 42 and 32 «An identical pair of connections results between the ceramic ring 46a and the ribs 32 and 42a, between the ceramic ring 46b and the ribs 42a and 33, between the ring 46c and the ribs 42b and 33a, and so on the arrangement along up to the ceramic ring 46k, whose flat sides in the same way with the ribs 33d and 42f are connected "

The assembly of the collector device 10 can be done piece by piece. On the other hand, a subassembly of the collector device 10 can be completed in a first step of one kind and the final assembly can be done in a step of a second kind. The state of the art of vacuum tube assembly provides various alternative options for suitable vacuum tube assembly programs. For example, a known ceramic-to-metal joining process can be used at a relatively high treatment temperature by first stacking the prepared ceramic spacers and ribs and then stacking this stack as a sub-assembly is subjected to a suitable heat treatment for the simultaneous formation of all metal-ceramic connections. "The shell-shaped peculiarity of the ribs supports the production of correct relative positions of the ribs and the ceramic rings during the stacking." The resulting subassembly can then with external parts, such as the Core 22, outer wall 24 and end cap 35 are all assembled with suitably arranged rings of brazing material such as an alloy of 35 # copper and 65 % gold or

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another suitable brazing material in place * The final assembly is then subjected to heating at a relatively low temperature in order to obtain the To bring about the formation of the brazed joints, for example by heating in a 3-hour program in a conventional belt conveyor brazing furnace at the same time as the brazing operations on the cathode and welding surfaces of the device take place"

The composite collector device with reduced Potential clearly has various novel and significant properties * Their structure results in a sufficient one Isolation of the parts with high electrical potential from earth potential and at the same time results in a path with low thermal impedance for heat flow to an * external heat sink »The difficulties duroh excessive relative different thermal expansions of ceramic and metal parts are considerably reduced

A particularly favorable feature of the invention results from the flexibility or relative freedom of movement of the parts of the assembly If e.g. the electron collector is cold, all collector parts are essentially at the same temperature »When the radiant power is switched on becomes, the electron collector core 22 heats up quickly and enlarges both its radial and its axial dimensions · The inwardly and outwardly extending arrays of sohale-shaped ribs are made of made of a flexible material that is easily pliable and many repeated cycles of dimensional changes made possible without destructive soil stresses being exerted on the ceramic-metal connections « The rib arrangement is such that it has a maximum

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Axial displacement of the outermost ceramic ring 46k, for example with reference to the innermost Keraraikring 46 he » roöglioht and also essentially the tendency to one radial expansion of the arrangement is transformed into an axial expansion «which causes stress on the ceramic-metal connections The progressive change in the angles of the halo-shaped parts 44 of the inwardly extending ribs starting from the rib 42 to the rib 42f according to FIG. 2 contribute to the latter Flexibility of the system at · In addition to other advantageous Features of the new collector structure, such as "B" that relatively complete lack of accessibility at the Hooh tension point for any person there is the characteristic that all insulating outer surfaces of the Ceramic rings 46 to 46a are protected against the ingress of moisture and dust. Similar characteristics of the inner Parts of the collector protect the inner surfaces of the ceramic rings 46 to 46k against deterioration through deposition of material from the inner walls of the Nucleus 22 evaporated by high-energy electrons or is removed in another way «

Figure 3 illustrates an alternative collector device 10a with lowered potential, which represents an additional advantageous property of the invention; i.e. the arrangements 2 and 3 can largely be assembled from similar or identical components, a note * times, which enables considerable cost savings because the entire inventory of tube parts is reduced accordingly · It is when looking at Figs. 2 and 3 to recognize “that many of the same parts are used in both assemblies and that the dimensions of most parts The structure shown in FIG. 3 can be the same as an example as a collector with lowered potential on the same

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basic RbTbren structure as he did with the Structure according to Fig. 2 is used «if an application z» B, the need for a more efficient vacuum tube To demonstrate the above considerations, Figures 2 and 3 are, although they are not necessarily in fact Scale drawings of optimal collectors are generally drawn on the same scale and certain generally corresponding parts are denoted by the same reference numerals * features in Fig. 3, which cannot be found in Fig. 2, are identified by reference numbers marked in the lOO series "

For example, the unitary collector core 22 of FIG. 2 in FIG. 3 is replaced by one core 122 of the three cooperating "axially aligned core parts 123" 123a and 123b consists "each limited by one another Sufficiently large gaps are insulated to avoid a stress breakdown along the gaps under vacuum operating conditions to prevent"

The core part 123 results z »B <> an inner electron collecting one Surface 22a similar to surface 22a shown in Fig. 2. The core part 123 is within a cladding wall attached by means of outwardly extending ribs 32 and 33. As in Fig. 2, the ribs 32 and 33 are your part with the help of the arrangement of ceramic rings 46 to 46k and by the arrangement of near inwardly extending ones Ribs 42 to 42f type ". The rib 33 and thus the core part 122 is given a suitable voltage across a line 124 is supplied »which is vacuum brazed Insulator 124a in the jacket wall 24 extends »

In same? Weig © © ygitet ά®τ Cores 123a an inner electron-collecting surface 22b "which is equivalent to the surface 22b according to Fig. 2" The core part 123a is

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inside the jacket wall 24 through itself to the outside extending ribs 33a and 33b supported. As in Fig. 2, the ribs 33a and 33b are in turn made by means of the Arrangement of ceramic rings 46 to 46k and through the cooperating arrangement of inwardly extending Ribs 42 to 42f supported · The rib 33b and thus the core part 123a is supplied with a suitable voltage via a line 125 which is vacuum-sealed Insulator 125a extends in the jacket wall 24.

Finally, the nucleus! 1 123b gives the inner electrons collecting surface 22d, which is analogous to the surface 22d according to FIG outer wall 24 'attached by outwardly extending ribs 33c and 33d "As in Figure" 2 are ribs 33o and 33d by the arrangement of ceramic rings 46 to 46k and by the arrangement of inwardly extending ones Ribs 42 to 42f grade »A suitable tension will be Via the line 14 in an arrangement similar to the arrangement according to FIG. 2, the core part 123b is fed ο

The assembly of the exemplary embodiment according to FIG. 3 can generally in the same manner as in the arrangement of the embodiment shown in FIG Is it to be seen "that the inner surfaces 22a" 22b and 22d of the successive core parts 123, 123a and 123b have a progressively smaller Durohmesser ο The assembly can be facilitated, for example, by using a template with the usual contact steps around the core parts 123, 123a and 123b in the correct relationship to hold together during brazing of the core pieces and the stacked ceramic ring assembly * Die The stencil can be pulled out when the brazing is finished and the sloh resulting subassembly can then

• A

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be brazed in the jacket 24 in a separate step. Alternative methods are available to those skilled in the art obvious for vacuum tube technology «

The operating characteristics of the collector device 10a according to Flg «3 are similar to those of the device 10 according to FIG. because the rib-insulator design is such that it allows a maximum axial displacement of the outermost ceramic ring 46 in relation to the innermost ceramic ring 46 » For example, the expansion takes place under increasing temperature conditions in such a way that the gaps between the Core parts 123 and 123a and between the core parts 123a and 123b safely above the stress breakdown values lie c

The embodiment of Figure 3 is all different Advantages of the execution example according to FIG. 2 * with this being associated with an improvement in efficiency » known way by a multi-stage collector with collecting electrodes or core parts with progressive! different Potentials in relation to mass can be achieved * »As it is understandable in technology, results This improvement is therefore "because the multi-electrode system can overcome effects" resulting from the distribution of windiness in the captured electrons result in * wherein there is a velocity dispersion inherent in the electron beam velocity modulation process "As is usual with collectors with reduced potential and several sections" is the first core part 123 operated with a potential »which enables it» to catch electrons at a relatively low speed » wherein the central core part 123a is at a potential that allows it to electrons with a mean Speed up, and being the final Core part 123b at a potential for trapping

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the electron with the highest energy lies «For example an optimal efficiency is achieved in a typical drilling operation with a helix 7 at ground potential achieved «when the cathode 2 is at -9O0DV, the core part 12J to -1000 V, the core part 123a to -4000 V and the Core part 123b is at -6000 V.

It can be seen that the invention is a significant improvement compared to the previously known technology and represents the implementation of a robust, shock-resistant electron beam collector device for operation with lowered potentials enables «The robust construction includes novel features« which ensure a long service life Power tube with electron beam bundling for repeated operating cycles without damaging the interacting ones Metal * and insulator parts of the collector and the connections between these parts ensures "expansion effects are directed in a favorable manner" that Shear stresses on such metal-insulator connections can be reduced considerably «which enables a long service life of the vacuum tube structure even under difficult operating conditions *

Claims t

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Claims (1)

Claims Device with linear electron beam beam shape and with the electron beam in energy exchange relation to high-frequency holding arrangements, marked by hollow electron beam collector devices (22) arranged at a distance from the high-frequency holding arrangements (7) with an axially extending inner surface (22a, £ 2b, 22d) for collecting the electrons and an axially extending outer surface (34), the electron beam Forraungsvorriehtung (2) and the high frequency circuit arrangement (7) holding vacuum housing devices (20, 2k, 25) and flexible holding device (33, 42, 46) for holding the electrical radiation collector device (22) within the vacuum housing device (20, 24, 25), the flexible holding device (33 * 42, 46) fixed to the outer surface (34) and on the vacuum housing device (2Oj, 24, 25) is attached in a heat exchange relationship « 2 «Device according to claim 1, characterized in that the flexible mounting device (33 * 42 * 46) thermally conductive ©, electrically insulating Devices for holding the electron beam collector device (22) in electrically isolated relationship with respect to the vacuum housing device (20, 24, 25) e 10988A / 1359 3 · Device according to claim 1 or 2, characterized characterized "that the electron beam" · collector device (22) with an electrical connection arrangement (14) is connected «which runs isolated through the vacuum housing device (20 * 24, 25) and that on she eats a potential that is negative with respect to the high-frequency circuit arrangement (7) and positive in with respect to the electron beam shaping device (2) is » 4. Device according to one of the preceding claims, characterized in that the flexible holding device first annular flexible metal fin assemblies (42) having first and second concentric portions «second annular flexible Metal rib assemblies (33) with third and fourth concentric parts and electrically insulating, thermally conductive Devices (46) comprising the first and third parts are mechanically connected to these to form a one-piece flexible mounting device. 5 · Device according to claim 4 «characterized» that the electrically insulating « heat conducting devices (46) have the shape of a ring with opposite flat parallel sides « which are mechanically connected to the first and third parts of the flexible metal fin assemblies (33 "42)" 6. Apparatus according to claim 4 or 5 * daduroh characterized "that the first part (42) dl · has the shape of a frustoconical base" 7 «device according to claim 4« 5 or 6 «daduroh characterized« that the fourth 109884/1359 Tell (33) has the shape of a kegeisturapffoona-like bowl " 8 $ device according to claim S ₉ thereby g © - indicates that the base of the frustoconical Shell (42) is attached to the vacuum housing provision (20, 24, 25) » 9 · Device according to claim 7, characterized in that the base is frustoconical Shell (33) attached to the outer surface (34) istο 10 «Device according to claim 5 * characterized in that the first and fourth parts having the shape of frustoconical shells with respective first and second bases «being the first base is attached to the vacuum housing device (20, 24, 25) and the second base is attached to the outer surface (34), and wherein the frustoconical shells a tapered durometer that goes in one direction starting from the high frequency circuit arrangement (7) decreases, exhibit" Ho device according to claim 1, characterized in that the flexible holding device a first number of substantially equal to Spaced apart rib arrangements (33) extending outward from the outer surface (34) » a second number of substantially equidistantly spaced apart from the vacuum housing assembly (20, 24, 25) near internally extending rib arrangements (42), 1 Q 9 8 8 4/1 3 5 9 which interlock without contact with the first number of rib assemblies (33) and form a number of uniform spaces between the interlocking elements, and a third number of thermally conductive "electrically insulating devices (46) / ^a ctle ^a at least a portion of each of the spaces between the occupy interlocking elements and are mechanically connected to these elements in such a way that they form a number of radial, electrically isolated, thermally conductive paths between the electron beam collector devices (122) and the vacuum housing devices (20, 24, 25) » 12 o device according to claim 11, characterized in that at least a first and a second electrical conductor device (124, 125) run insulated through the vacuum housing precursor (20, 24, 25) for supplying electrical potentials to the electron beam collector device (122), the at least first and second electrically isolated axially aligned parts (123, 123a), and that the first and second conductor devices (124, 125) each have first and second potentials at the respective first and second aligned parts (123, 123a) of the Electron beam collector device (122) can feed. 1098 8 4/1359 L e rs e s {■ e