JP2018156851A - Collector for electronic tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize a collector for an electronic tube.SOLUTION: A collector for electronic tube 1 includes: a cylindrical ground electrode 2; and a plurality of collector electrodes 5a and 5b that includes a cylindrical shape, in which an outer peripheral surface is separated from an inner peripheral surface of the cylindrical ground electrode 2, and which is arranged in parallel with a direction of a center axis of the cylindrical ground electrode 2 in the inner part of the cylindrical ground electrode 2. The collector for electronic tube 1 comprises insulation members 11 and 12 arranged between the cylindrical ground electrode 2 and the collector electrodes 5a and 5b. The insulation members 11 and 12 are nipped to a direction orthogonal to the center axis by the cylindrical ground electrode 2 and the plurality of collector electrodes 5a and 5b. The insulation members 11 and 12 are nipped to the direction of the center axis by a flange 8 and a fixed member 9. The insulation members 11 and 12 insulate the cylindrical ground electrode 2 and the collector electrodes 5a and 5b. The insulation members 11 and 12 insulate provide a projection part 14 positioned between the adjacent collector electrodes 5a and 5b, and thus the collector electrode 5a and the collector electrode 5b are insulated.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a collector for an electron tube.

  A collector used in an electron tube such as a traveling wave tube, a klystron, or a gyrotron is an electrode that recovers energy of an electron beam emitted from an electron gun in the electron tube. In an electron tube, a multistage collector for an electron tube having a plurality of electrodes is used in order to increase the electron beam recovery efficiency. The collector disclosed in Patent Document 1 has a plurality of electrode structures.

JP 2005-519448

  The collector used in the electron tube needs to have a voltage resistance, and it is necessary to cool the heat generated when the electron beam is captured, so that the collector becomes larger than other components of the electron tube. In the collector disclosed in Patent Document 1, since the electrical connection portion connected to the electrode structure is drawn out in the radial direction of the collector, the size of the collector increases in the radial direction.

  The present invention has been made in view of the above circumstances, and an object thereof is to reduce the size of an electron tube collector.

  In order to achieve the above object, a collector for an electron tube according to the present invention includes a cylindrical ground electrode, a terminal portion, a plurality of cylindrical collector electrodes, a terminal, a transmission line, a cylindrical flange, an insulating member, and a cylindrical A fixing member is provided. The end portion closes one end in the direction of the central axis of the ground electrode. The plurality of collector electrodes are arranged side by side in the direction of the central axis inside the ground electrode, with the outer peripheral surface being separated from the inner peripheral surface of the ground electrode. A terminal is provided for each collector electrode. The terminals protrude from the terminal end to the opposite side of the collector electrode and are separated from each other. The transmission line is disposed between the ground electrode and the collector electrode, and electrically connects the collector electrode and the terminal. The flange is attached to the other end in the direction of the central axis of the ground electrode. The insulating member is disposed between the ground electrode and the collector electrode, and is sandwiched between the ground electrode and the plurality of collector electrodes in a direction perpendicular to the central axis. The insulating member abuts on the flange. The insulating member has a protrusion located between adjacent collector electrodes. The insulating member is formed with a wiring hole extending in the direction of the central axis and through which the transmission line is passed. The fixing member contacts the inner peripheral surface of the ground electrode. The fixing member holds the insulating member in the direction of the central axis between the fixing member and the flange. The collector electrode closest to the end portion has a cylindrical shape with one end on the end portion side closed.

  According to the present invention, the insulating member that is disposed between the ground electrode and the collector electrode and in which the wiring hole through which the transmission line connecting the collector electrode and the terminal is formed is formed in the direction of the central axis of the ground electrode. Further, the electron tube collector can be reduced in size by being sandwiched in a direction perpendicular to the central axis.

Sectional drawing of the collector for electron tubes which concerns on Embodiment 1 of this invention Sectional drawing of the collector for electron tubes concerning Embodiment 1 Bottom view of electron tube collector according to Embodiment 1 The figure which shows the assembly method of the collector for electron tubes which concerns on Embodiment 1. FIG. Sectional drawing of the collector for electron tubes concerning Embodiment 1 Sectional drawing of the collector for electron tubes concerning Embodiment 1 Sectional drawing of the collector for electron tubes concerning Embodiment 1 Sectional drawing of the collector for electron tubes concerning Embodiment 1 Sectional drawing of the collector for electron tubes which concerns on Embodiment 2 of this invention Sectional drawing of the collector for electron tubes concerning Embodiment 2

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or equivalent parts are denoted by the same reference numerals.

(Embodiment 1)
FIG. 1 is a sectional view of an electron tube collector according to Embodiment 1 of the present invention. FIG. 1 is a cross-sectional view taken along the direction of the central axis of the electron tube collector 1. The central axis is indicated by a dashed-dotted axis A in FIG. FIG. 2 is a sectional view of the electron tube collector according to the first embodiment. 2 is a cross-sectional view taken along line BB in FIG. FIG. 3 is a bottom view of the electron tube collector according to the first embodiment. FIG. 3 is a view of the electron tube collector 1 viewed from the right end in FIG. The electron tube collector 1 is a multistage electron tube collector that has a plurality of electrodes and captures an electron beam incident by the plurality of electrodes. Since the electron tube collector 1 has a plurality of electrodes, the energy recovery efficiency of the electron beam is improved. The electron tube collector 1 includes a ground electrode 2 and a plurality of collector electrodes 5a and 5b. By pulling out a terminal, which will be described later, which is electrically connected to the collector electrodes 5a and 5b in the direction of the central axis, the electron tube collector 1 can be downsized in the radial direction. Each part of the electron tube collector 1 will be described.

  The electron tube collector 1 has a cylindrical ground electrode 2 and a cylindrical shape. The outer peripheral surface is separated from the inner peripheral surface of the ground electrode 2, and the central axis of the ground electrode 2 is inside the ground electrode 2. A plurality of collector electrodes 5a and 5b arranged side by side. The central axis of the ground electrode 2 is the same as the central axis of the electron tube collector 1 indicated by a one-dot chain line in FIG. In the ground electrode 2, collector electrodes 5 a and 5 b are arranged at positions where the central axis coincides with or is parallel to the central axis of the ground electrode 2.

  One end of the ground electrode 2 in the direction of the central axis is closed by the terminal portion 3. The terminal portion 3 is fixed to the ground electrode 2 via a cylindrical connecting member 4. Terminals 6a and 6b are provided for collector electrodes 5a and 5b, respectively. The terminals 6a and 6b protrude from the end portion 3 to the opposite side of the collector electrodes 5a and 5b, and are separated from each other. Collector electrode 5a and terminal 6a are electrically connected by transmission line 7a. The collector electrode 5b and the terminal 6b are electrically connected by a transmission line 7b. The transmission lines 7a and 7b are made of metal and are, for example, nickel wires. Transmission lines 7a and 7b are arranged between ground electrode 2 and collector electrodes 5a and 5b, respectively. A cylindrical flange 8 is attached to the other end in the direction of the central axis of the ground electrode 2. The flange 8 is brazed to the ground electrode 2. The flange 8 connects the electron tube collector 1 to the electron tube main body. The distance between the flange 8 and the collector electrode 5b is determined according to the design of the electron tube. The cylindrical fixing member 9 contacts the inner peripheral surface of the ground electrode 2. The fixing member 9 sandwiches an insulating member described later in the direction of the central axis between the fixing member 9 and the flange 8.

  The electron tube collector 1 includes an insulating member disposed between the ground electrode 2 and the collector electrodes 5a and 5b. The insulating member is sandwiched between the ground electrode 2 and the plurality of collector electrodes 5a and 5b in a direction perpendicular to the central axis. The insulating member abuts on the flange 8 and is sandwiched between the flange 8 and the fixing member 9 in the direction of the central axis. The insulating member insulates the ground electrode 2 from the collector electrodes 5a and 5b. In addition, the insulating member insulates the collector electrode 5a and the collector electrode 5b by providing a later-described protrusion positioned between the adjacent collector electrodes 5a and 5b. The insulating member is a member having a conductivity equal to or lower than a threshold value, and the threshold value is sufficiently small so that the ground electrode 2 and the collector electrodes 5a and 5b can be regarded as being insulated from each other.

  In the example of the first embodiment, the electron tube collector 1 includes a first insulating member 11 and a second insulating member 12 as insulating members. The first insulating member 11 has a cylindrical shape, and a wiring hole 13 through which the transmission line 7b is passed is formed inside. The second insulating member 12 has a cylindrical shape in contact with the inner peripheral surface of the ground electrode 2. A cutout 15 extending in the direction of the central axis is formed on the outer peripheral side of the second insulating member 12. The first insulating member 11 is located inside the notch 15 of the second insulating member 12.

  The first insulating member 11 and the second insulating member 12 are formed of, for example, a metallized ceramic. For example, a molybdenum-manganese layer is formed on the surfaces of the first insulating member 11 and the second insulating member 12, and a nickel layer is formed on the molybdenum-manganese layer. In the example of the first embodiment, the second insulating member 12 has a protrusion 14 positioned between adjacent collector electrodes 5a and 5b. The collector electrodes 5 a and 5 b are insulated from each other by the protrusion 14. The second insulating member 12 is brazed to the ground electrode 2 and the collector electrodes 5a and 5b using, for example, silver brazing foil. The first insulating member 11 and the second insulating member 12 are formed of members having a thermal conductivity equal to or higher than a threshold value. The threshold value can be determined according to the amount of heat generated in the collector electrodes 5a and 5b. By forming the first insulating member 11 and the second insulating member 12 with members having a thermal conductivity equal to or higher than a threshold value, the collector electrode 5a is insulated from the ground electrode 2 and the collector electrodes 5a and 5b. , 5b can be transferred to the ground electrode 2 to cool the collector electrodes 5a, 5b.

  In the example of FIG. 2, the second insulating member 12 has a semi-cylindrical shape having a notch 15 a on the outer peripheral side and a protrusion 14 a on the inner peripheral side, and a cutout on the outer peripheral side. A notch 15b is formed, and the second insulating member 12b having a semi-cylindrical shape having a protrusion 14b on the inner peripheral side is combined. The protrusions 14 a and 14 b are combined to form the protrusion 14. The notches 15a and 15b are combined to form the notches 15.

  The first insulating member 11 and the second insulating member 12 are sandwiched between the ground electrode 2 and the collector electrodes 5a and 5b in a direction perpendicular to the central axis. The first insulating member 11 is sandwiched between the flange 8 and the fixing member 9 in the direction of the central axis. Since the first insulating member 11 is sandwiched in the direction perpendicular to the central axis and the direction of the central axis, it is possible to suppress damage to the first insulating member 11 due to vibration. The fixing member 9 comes into contact with the end surface of the first insulating member 11 on the end portion 3 side. In the example of FIG. 1, a cutout is formed on the inner peripheral side of the fixing member 9, and the fixing member 9 abuts the end surface of the first insulating member 11 on the end portion 3 side without closing the wiring hole 13. . In the example of FIG. 2, the first insulating member 11 is sandwiched in the circumferential direction by the second insulating member 12. The first insulating member 11 is not only clamped in the direction orthogonal to the central axis and in the direction of the central axis, but is also clamped in the circumferential direction, thereby suppressing damage to the first insulating member 11 due to vibration. It is possible.

  In the example of FIGS. 1 to 3, the ground electrode 2, the connecting member 4, the collector electrodes 5 a and 5 b, the flange 8, the fixing member 9, the first insulating member 11, and the second insulating member 12 are cylindrical. Moreover, the termination | terminus part 3 is disk shape. The ground electrode 2 and the collector electrodes 5a and 5b are made of metal, for example, oxygen-free copper. The termination | terminus part 3, the connection member 4, and the fixing member 9 are formed with a metal, for example, are formed with Kovar. In the example of FIG. 1, in the collector electrodes 5a and 5b, the ends closer to the incident position of the electron beam have a truncated cone shape. The collector electrodes 5a and 5b have beam transmission holes at one end closer to the incident position of the electron beam. Of the collector electrodes 5a and 5b, the collector electrode 5a closest to the terminal end 3 has a cylindrical shape with one end on the terminal end 3 side closed. As approaching the closed end of the collector electrode 5a, the cross-sectional area perpendicular to the axis A of the cavity inside the collector electrode 5a may be reduced. The shapes of the protrusions 14 included in the collector electrodes 5 a and 5 b and the second insulating member 12 are adjusted according to the electron beam incident conditions in the electron tube collector 1.

  A method for manufacturing the electron tube collector 1 according to the first embodiment will be described. FIG. 4 is a diagram showing an assembly method of the electron tube collector according to the first embodiment. The flange 8 attached to the ground electrode 2 is brought into contact with the jig 31. The collector electrode 5b, the second insulating member 12, and the collector electrode 5a are inserted into the ground electrode 2 in this order. While pressing the second insulating member 12 in the direction of the central axis by the jig 32, the contact surfaces of the collector electrodes 5a and 5b and the second insulating member 12, and the second insulating member 12 and the ground electrode The contact surface with 2 is joined. Next, the first insulating member 11 is inserted into the notch 15 of the second insulating member 12, and the fixing member 9 is inserted into the ground electrode 2. The contact surface between the fixing member 9 and the ground electrode 2 is joined with the jig 33 while pressing the fixing member 9 and the first insulating member 11 in the direction of the central axis. When the fixing member 9 is joined to the ground electrode 2, the first insulating member 11 is sandwiched between the flange 8 and the fixing member 9 in the direction of the central axis.

  For example, the electron tube collector 1 is assembled in the above-described procedure in a direction in which the central axis of the ground electrode 2 coincides with the vertical direction. In this case, the jig 31, the jig 32, and the jig 33 face each other in the vertical direction. In the manufacturing method described above, bonding is performed by brazing using, for example, silver brazing foil.

  FIG. 5 is a sectional view of the electron tube collector according to the first embodiment. The way of viewing the figure is the same as in FIG. FIG. 6 is a cross-sectional view of the electron tube collector according to the first embodiment. 6 is a cross-sectional view taken along the line CC of FIG. The way of viewing the figure is the same as in FIG. In the example of FIG. 1 and FIG. 2, the second insulating member 12 has the protrusion 14, but in the examples of FIG. 5 and FIG. 6, the second insulating member 12 does not have the protrusion 14, The electron tube collector 1 includes a third insulating member 16. The third insulating member 16 has a cylindrical shape, is in contact with the inner peripheral surface of the second insulating member 12, and is positioned between the adjacent collector electrodes 5a and 5b.

  The number of collector electrodes provided in the electron tube collector 1 is arbitrary. FIG. 7 is a cross-sectional view of the electron tube collector according to the first embodiment. The way of viewing the figure is the same as in FIG. FIG. 8 is a cross-sectional view of the electron tube collector according to the first embodiment. 8 is a cross-sectional view taken along the line DD of FIG. The way of viewing the figure is the same as in FIG. 7 and 8, the electron tube collector 1 includes collector electrodes 5a, 5b, and 5c. The collector electrode 5c is made of, for example, oxygen-free copper, like the collector electrodes 5a and 5b. Terminals 6a, 6b, and 6c are provided for collector electrodes 5a, 5b, and 5c, respectively. Terminals 6a, 6b, and 6c protrude from terminal portion 3 on the opposite side to collector electrodes 5a, 5b, and 5c. Collector electrode 5a and terminal 6a are electrically connected by transmission line 7a. The collector electrode 5b and the terminal 6b are electrically connected by a transmission line 7b. The collector electrode 5c and the terminal 6c are electrically connected by a transmission line 7c. The transmission line 7c is formed of a metal like the transmission lines 7a and 7b, and is, for example, a nickel wire.

  7 and 8, the electron tube collector 1 includes first insulating members 17 and 18 and a second insulating member 12 disposed between the ground electrode 2 and the collector electrodes 5a, 5b, and 5c. . The first insulating member 17 has a cylindrical shape, and a wiring hole 19 through which the transmission line 7b is passed is formed. The first insulating member 18 has a cylindrical shape, and a wiring hole 20 through which the transmission line 7c is passed is formed. The first insulating members 17 and 18 are in contact with the flange 8. The second insulating member 12 has a cylindrical shape in contact with the inner peripheral surface of the ground electrode 2. Cutouts 21 and 22 extending in the direction of the central axis are formed on the outer peripheral side of the second insulating member 12. The first insulating member 17 is located inside the notch 21 of the second insulating member 12. The first insulating member 18 is located inside the notch 22 of the second insulating member 12. The electron tube collector 1 includes a third insulating member 16a positioned between the collector electrodes 5a and 5b and a third insulating member 16b positioned between the collector electrodes 5b and 5c.

  The second insulating member 12 has a semi-cylindrical shape having a semi-cylindrical shape in which notches 21a and 22a are formed on the outer peripheral side and a semi-cylindrical shape in which notches 21b and 22b are formed on the outer peripheral side. The second insulating member 12b is formed in combination. The notches 21a and 21b are combined to form the notches 21. The notches 22a and 22b are combined to form the notches 22. The notch 21 and the notch 22 are located on the opposite side with respect to the central axis.

  The first insulating members 17 and 18 and the second insulating member 12 are sandwiched between the ground electrode 2 and the collector electrodes 5a, 5b and 5c in a direction perpendicular to the central axis. The first insulating members 17 and 18 are sandwiched between the flange 8 and the fixing member 9 in the direction of the central axis. The fixing member 9 comes into contact with the end surfaces of the first insulating members 17 and 18 on the end portion 3 side. In the example of FIG. 7, a notch is formed on the inner peripheral side of the fixing member 9, and the fixing member 9 does not block the wiring holes 19 and 20, and each of the terminal portions 3 of the first insulating members 17 and 18. It abuts on the side end face. In the example of FIG. 8, the first insulating members 17 and 18 are each sandwiched by the second insulating member 12 in the circumferential direction.

  7 and 8, the second insulating member 12, the collector electrode 5c, the third insulating member 16b, and the collector electrode 5b are disposed inside the ground electrode 2 to which the flange 8 is attached. The third insulating member 16a and the collector electrode 5a are sequentially inserted. Then, while pressing the second insulating member 12 in the direction of the central axis, the contact surfaces of the collector electrodes 5a, 5b, 5c and the second insulating member 12, and the second insulating member 12 and the ground electrode 2 Join the contact surface with. Next, the first insulating member 17 is inserted into the notch 21 of the second insulating member 12, the first insulating member 18 is inserted into the notch 22 of the second insulating member 12, and the fixing member 9 is grounded. Insert into the electrode 2. The contact surface between the fixing member 9 and the ground electrode 2 is joined while pressing the fixing member 9 and the first insulating members 17 and 18 in the direction of the central axis. By fixing the fixing member 9 to the ground electrode 2, the first insulating members 17 and 18 are sandwiched by the flange 8 and the fixing member 9 in the direction of the central axis.

  As described above, according to the electron tube collector 1 according to the first embodiment, the transmission line 7b arranged between the ground electrode 2 and the collector electrodes 5a and 5b and connecting the collector electrode 5b and the terminal 6b is connected. Since the first insulating member 11 in which the wiring hole 13 to be passed is formed is sandwiched in the direction of the central axis of the ground electrode 2 and the direction perpendicular to the central axis, the electron tube collector 1 can be downsized. is there. Further, the first insulating member 11 is sandwiched in the direction of the central axis and in the direction orthogonal to the central axis, so that damage to the first insulating member 11 due to vibration can be suppressed.

(Embodiment 2)
FIG. 9 is a sectional view of an electron tube collector according to Embodiment 2 of the present invention. The way of viewing the figure is the same as in FIG. FIG. 10 is a cross-sectional view of the electron tube collector according to the second embodiment. 10 is a cross-sectional view taken along line EE in FIG. The electron tube collector according to the second embodiment includes a plurality of cylindrical insulating members 23a, 23b, and 23c disposed between the ground electrode 2 and the collector electrodes 5a and 5b. The cylindrical insulating members 23a, 23b, and 23c are arranged inside the ground electrode 2 in the direction of the central axis indicated by the dashed line axis A in FIG. The cylindrical insulating members 23a, 23b, and 23c are in contact with each other. The cylindrical insulating member 23 c comes into contact with the flange 8. Wiring holes 24a, 24b, and 24c are formed in the cylindrical insulating members 23a, 23b, and 23c, respectively. The wiring holes 24a, 24b, and 24c communicate with each other, and the transmission line 7b is drawn through the communicating wiring holes 24a, 24b, and 24c. If the length of the through hole in the penetrating direction is increased, it becomes difficult to maintain the accuracy of manufacturing the through hole. The electron tube collector 1 according to the second embodiment is provided with a plurality of cylindrical insulating members 23a, 23b, and 23c, thereby manufacturing the wiring holes 24a, 24b, and 24c in the cylindrical insulating members 23a, 23b, and 23c, respectively. It is possible to maintain accuracy.

  At least one of the cylindrical insulating members 23a, 23b, and 23c has a protruding portion 14. 9 and 10, the cylindrical insulating member 23 b has the protrusion 14. The collector electrodes 5a and 5b are insulated from each other by the protruding portion 14 of the cylindrical insulating member 23b. The cylindrical insulating members 23a, 23b, and 23c are formed of, for example, a metallized ceramic, as with the first insulating member 11 and the second insulating member 12. The cylindrical insulating members 23a, 23b, and 23c are brazed to the ground electrode 2 and the collector electrodes 5a and 5b using, for example, silver brazing foil. The cylindrical insulating members 23a, 23b, and 23c are formed of members having a thermal conductivity equal to or higher than a threshold value. The threshold value can be determined according to the amount of heat generated in the collector electrodes 5a and 5b. The cylindrical insulating members 23a, 23b, and 23c are formed of members having a thermal conductivity equal to or higher than a threshold value, and thus are generated in the collector electrodes 5a and 5b in a state where the ground electrode 2 and the collector electrodes 5a and 5b are insulated from each other. The transmitted heat is transmitted to the ground electrode 2, and the collector electrodes 5a and 5b can be cooled.

  The cylindrical insulating members 23a, 23b, and 23c are sandwiched between the ground electrode 2 and the collector electrodes 5a and 5b in a direction orthogonal to the central axis. The cylindrical insulating members 23a, 23b, and 23c are sandwiched by the flange 8 and the fixing member 9 in the direction of the central axis. The fixing member 9 is in contact with the end surface of the cylindrical insulating member 23a on the end portion 3 side. In the example of FIG. 9, a notch is formed on the inner peripheral side of the fixing member 9, and the fixing member 9 abuts on the end surface of the cylindrical insulating member 23 a on the end portion 3 side without closing the wiring hole 24 a.

  As described above, according to the electron tube collector 1 according to the second embodiment, the transmission line 7b disposed between the ground electrode 2 and the collector electrodes 5a and 5b and connecting the collector electrode 5b and the terminal 6b is drawn. The cylindrical insulating members 23a, 23b, and 23c, in which the wiring holes 24a, 24b, and 24c are respectively passed, are sandwiched in the direction of the central axis of the ground electrode 2 and the direction perpendicular to the central axis. The collector 1 can be downsized. Further, the electron tube collector 1 according to Embodiment 2 is provided with a plurality of cylindrical insulating members 23a, 23b, and 23c, thereby manufacturing the wiring holes 24a, 24b, and 24c in the cylindrical insulating members 23a, 23b, and 23c, respectively. It is possible to maintain the accuracy of.

  The embodiment of the present invention is not limited to the above-described embodiment. The shapes of the ground electrode 2, the collector electrodes 5a, 5b, and 5c, the first insulating members 11, 17, and 18, the second insulating member 12, and the third insulating members 16, 16a, and 16b are the same as those in the above-described embodiment. It is not limited to examples.

  1 Electron tube collector, 2 Ground electrode, 3 Termination part, 4 Connection member, 5a, 5b, 5c Collector electrode, 6a, 6b, 6c Terminal, 7a, 7b, 7c Transmission line, 8 Flange, 9 Fixing member, 11, 17 , 18 First insulating member, 12, 12a, 12b Second insulating member, 13, 19, 20, 24a, 24b, 24c Wiring hole, 14, 14a, 14b Protrusion, 15, 15a, 15b, 21, 21a , 21b, 22, 22a, 22b Notch, 16, 16a, 16b Third insulating member, 23a, 23b, 23c Cylindrical insulating member, 31, 32, 33 Jig.

Claims (8)

A cylindrical ground electrode;
A terminal portion closing one end in the direction of the central axis of the ground electrode;
A plurality of collector electrodes having a cylindrical shape and having an outer peripheral surface spaced apart from an inner peripheral surface of the ground electrode and arranged in the direction of the central axis inside the ground electrode;
Provided for each of the collector electrodes, protruding from the terminal portion to the opposite side of the collector electrode, and spaced apart from each other;
A transmission line disposed between the ground electrode and the collector electrode and electrically connecting the collector electrode and the terminal;
A cylindrical flange attached to the other end in the direction of the central axis of the ground electrode;
It is arranged between the ground electrode and the collector electrode, is sandwiched by the ground electrode and the plurality of collector electrodes in a direction perpendicular to the central axis, abuts on the flange, and between the adjacent collector electrodes An insulating member having a protruding portion, extending in the direction of the central axis, and forming a wiring hole through which the transmission line is passed;
A cylindrical fixing member that is in contact with the inner peripheral surface of the ground electrode and sandwiches the insulating member in the direction of the central axis with the flange;
With
The collector electrode closest to the end portion has a cylindrical shape with one end on the end portion side closed,
Collector for electron tubes. As the insulating member,
A cylindrical first insulating member in which the wiring hole is formed;
A second insulating member having a cylindrical shape in contact with the inner peripheral surface of the ground electrode, and a notch extending in the direction of the central axis is formed on the outer peripheral side;
Have
The first insulating member is located inside the notch of the second insulating member;
The collector for an electron tube according to claim 1. The first insulating member and the second insulating member are sandwiched by the ground electrode and the plurality of collector electrodes in a direction perpendicular to the central axis,
The first insulating member is sandwiched in the direction of the central axis by the flange and the fixing member.
The electron tube collector according to claim 2.   The collector for an electron tube according to claim 2 or 3, wherein the first insulating member is sandwiched in the circumferential direction by the second insulating member.   5. The electron tube collector according to claim 2, wherein the second insulating member has the protruding portion. 6.   5. The tubular protrusion according to claim 2, further comprising a cylindrical third insulating member that is in contact with the inner peripheral surface of the second insulating member and is positioned between the adjacent collector electrodes. A collector for an electron tube as described in 1. As the insulating member, the wiring hole is formed in each, and a plurality of cylindrical insulating members arranged in the direction of the central axis are arranged inside the ground electrode,
At least one of the plurality of tubular insulating members has the protrusion.
The collector for an electron tube according to claim 1.   The collector for an electron tube according to any one of claims 1 to 7, wherein the ground electrode, the collector electrode, the flange, the fixing member, and the insulating member have a cylindrical shape, and the terminal portion has a disk shape.

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