CN217641200U - Indirect-heating cathode electron source - Google Patents
Indirect-heating cathode electron source Download PDFInfo
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- CN217641200U CN217641200U CN202221313898.4U CN202221313898U CN217641200U CN 217641200 U CN217641200 U CN 217641200U CN 202221313898 U CN202221313898 U CN 202221313898U CN 217641200 U CN217641200 U CN 217641200U
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Abstract
The utility model relates to the technical field of electric vacuum devices, and discloses an indirect heating type cathode electron source, which comprises a flange plate, an inner heat shielding cylinder and an outer heat shielding cylinder, wherein the inner heat shielding cylinder and the outer heat shielding cylinder are coaxially and fixedly connected with the flange plate; a first opening is formed in one end, far away from the flange, of the inner heat shielding cylinder, a gap is formed between the inner heat shielding cylinder and the outer heat shielding cylinder, and a heat shielding layer is arranged in the gap close to the first opening; the inner heat shields a section of thick bamboo and keeps away from the one end of ring flange is equipped with inner core and heater, the inner core with the butt has the negative pole piece between the first opening, the negative pole piece with be equipped with the carbon film between the inner heat shields a section of thick bamboo, the one end of heater is run through the lateral wall fixed connection of an inner heat shields a section of thick bamboo is in on the lateral wall of an inner heat shields a section of thick bamboo, the other end of heater is in through setting up the guide subassembly of an inner heat shields a section of thick bamboo extends the ring flange. The utility model discloses less thermal loss can be realized, heating efficiency is improved.
Description
Technical Field
The utility model relates to an electric vacuum device technical field, concretely relates to indirect type cathode electron source.
Background
The traditional linear microwave injection tube, such as klystron and traveling wave tube, is an important electronic device in electronic systems such as microwave relay communication, radar, electronic countermeasure and satellite communication. The electron gun is a heart of the linear injection microwave tube and provides electron beams required by interaction for a high-frequency circuit of the microwave tube. In the engineering field, electron guns generally use a hot cathode as an electron beam emitter, and the preheating time of the hot cathode usually takes tens to hundreds of seconds. The cathode electron source is used as the electron supply part of the electron gun, and is not a separate integral body, and the cathode electron source and the electron gun body are combined to form a component with a complete current loop. In some special scenes, the cathode electron source is required to have the characteristics of low power and shock resistance.
SUMMERY OF THE UTILITY MODEL
The utility model provides an indirect heating type cathode electron source, in particular to an indirect heating type cathode electron source with low power and shock resistance.
The utility model discloses a following technical scheme realizes:
an indirect-heating cathode electron source comprises a flange plate, an inner heat shielding cylinder and an outer heat shielding cylinder, wherein the inner heat shielding cylinder and the outer heat shielding cylinder are coaxially and fixedly connected with the flange plate; one end, far away from the flange, of the outer heat shielding cylinder is fixedly connected to the outer side wall of the inner heat shielding cylinder, a first opening is formed in one end, far away from the flange, of the inner heat shielding cylinder, a gap is formed between the inner heat shielding cylinder and the outer heat shielding cylinder, and a heat shielding layer is arranged in the gap close to the first opening;
an anti-seismic inner core and a heater are arranged at one end, away from the flange, of the inner heat shield cylinder, a cathode plate is abutted between the anti-seismic inner core and the first opening, a carbon film is arranged between the cathode plate and the inner heat shield cylinder, a thread groove is formed in the circumferential side wall of the anti-seismic inner core, the heater is tightly attached to the bottom of the thread groove, an anti-falling mechanism enabling the heater not to be separated from the thread groove is arranged on the outer side surface of the anti-seismic inner core, one end of the heater penetrates through the side wall of the inner heat shield cylinder and is fixedly connected to the outer side wall of the inner heat shield cylinder, and the other end of the heater extends out of the flange; and a support assembly for supporting the anti-seismic inner core is fixedly arranged in the cavity of the inner heat shield cylinder.
Among this technical scheme, shield a section of thick bamboo through setting up outer heat shield section of thick bamboo and interior heat shield, and set up the heat shield in the clearance that is close to first open-ended, can realize less thermal loss well, the heating efficiency is improved, thereby heating power can be reduced, simultaneously, set up the antidetonation inner core in the heat shield section of thick bamboo, the heater laminating is in the thread groove of antidetonation inner core lateral wall, can fix the heater better, cathode electron source has been reduced and tungsten filament (being close to first open-ended tungsten filament) fracture that leads to the high temperature section in the motion process has reduced, the shock resistance of this cathode electron source has been improved, and simultaneously, avoid cathode electron source when work, two point contacts on the heater lead to the short circuit.
As an optimization, the inner heat shielding cylinder comprises a cathode supporting cylinder and a cathode fixing cylinder which are provided with openings from top to bottom, the size of the cathode fixing cylinder is larger than that of the cathode supporting cylinder, the upper end opening of the cathode fixing cylinder is a first opening, the inner side wall of the cathode fixing cylinder is fixedly connected with the outer side wall of the cathode supporting cylinder, the cathode fixing cylinder is located above the cathode supporting cylinder, the upper end opening of the outer heat shielding cylinder is fixedly connected with the outer side wall of the cathode fixing cylinder, a carbon film is arranged on the part of the cathode sheet coinciding with the projection of the cathode supporting cylinder on the vertical surface, and the area of the cathode sheet is larger than that of the first opening.
Preferably, the height of the upper surface of the cathode sheet is flush with the upper end opening of the cathode supporting cylinder, the upper end surface of the cathode supporting cylinder is fixedly connected with the bottom of the top wall of the cathode fixing cylinder, and a carbon film is arranged on the part, coinciding with the projection of the top wall bottom of the cathode fixing cylinder on the horizontal plane, of the upper surface of the cathode sheet.
As the optimization, the supporting component is including fixing spacing inner tube on the cathode supporting barrel inner wall, all be equipped with the opening from top to bottom on the spacing inner tube, the top butt of spacing inner tube has been used for supporting the support top pearl of antidetonation inner core, support all to be equipped with the opening from top to bottom on the top pearl, just support the opening of top pearl with the coaxial setting of opening of spacing inner tube, support the top of top pearl with the bottom butt of antidetonation inner core, the top of antidetonation inner core with the bottom butt of negative pole piece.
As an optimization, anti-disengaging mechanism include with the antidetonation urceolus that the lateral wall sliding fit of antidetonation inner core set up, the inside wall of antidetonation urceolus with the lateral wall contact of antidetonation inner core, all be equipped with the opening from top to bottom of antidetonation urceolus, the opening of antidetonation urceolus with support the coaxial setting of opening of top pearl, just the height of antidetonation urceolus with the height of antidetonation inner core is the same, runs through the lateral wall upper portion of a cathode support section of thick bamboo and the lateral wall upper portion of antidetonation urceolus are equipped with the confession the through-hole that the heater passed, the heater passes the through-hole is fixed on the lateral wall of a cathode support section of thick bamboo, the top and the bottom of antidetonation urceolus respectively with the negative pole piece with support top pearl butt.
As optimization, flange plate axle center department is equipped with the flange hole, the downthehole thermal-insulated ball that pushes up of installing of flange, thermal-insulated ball that pushes up all is equipped with the opening from top to bottom, just thermal-insulated ball that pushes up the opening with the coaxial setting of a cathode support section of thick bamboo, the heater loops through support the upper end opening of ball, lower extreme opening, the upper end opening of thermal-insulated ball that pushes up, lower extreme opening extend to outside the flange plate.
Preferably, the flange plate comprises a flange hole positioned at the axle center of the flange plate and a clamping groove arranged at the bottom of the flange plate, the flange hole is communicated with the inner cavity of the inner heat shielding cylinder, the bottom of the clamping groove is communicated with the flange hole, a hard clamping piece is fixedly connected in the clamping groove, the central axis along outer heat shield section of thick bamboo runs through the stereoplasm card is equipped with the confession the perforation that the heater passed, the cross-section in flange hole is "protruding" font, thermal-insulated apical pearl is located in the flange is downthehole and pass through the stereoplasm card is fixed in the flange is downthehole.
Preferably, the cathode sheet is made of a hot cathode material
Preferably, the heater is made of a tungsten heating wire.
Preferably, the outer heat shielding cylinder, the inner heat shielding cylinder, the heat shielding layer and the limiting inner cylinder are all made of, but not limited to, tantalum metal.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
the utility model discloses a set up an outer thermal shield section of thick bamboo and an interior thermal shield section of thick bamboo, and set up the heat shield in the clearance that is close to first opening, can realize less thermal loss well, improve heating efficiency, thereby can reduce heating power, and increase the life-span of negative pole electron source to a certain extent, and simultaneously, set up the antidetonation inner core in the heat shield section of thick bamboo, the heating element laminating is in the thread groove of antidetonation inner core lateral wall, can avoid negative pole electron source in high-speed operation, two point contact on the heating element leads to the short circuit, therefore, this negative pole electron source's shock resistance has been improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a schematic cross-sectional structure diagram of an indirect cathode electron source according to the present invention.
Reference numbers and corresponding part names in the drawings:
1-cathode sheet, 2-cathode fixing cylinder, 3-cathode supporting cylinder, 4-anti-seismic inner core, 5-heater, 6-anti-seismic outer cylinder, 7-supporting top bead, 8-limiting inner cylinder, 9-heat shielding layer, 10-heat insulating top bead, 11-flange plate, 12-hard card and 13-external heat shielding cylinder.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more clearly understood, the following description is given for further details of the present invention with reference to the accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention, and are not intended to limit the present invention.
Example 1
This example 1 provides an indirect cathode electron source which, as shown in FIG. 1,
the heat shield comprises a flange plate 11, and an inner heat shield cylinder and an outer heat shield cylinder 13 which are coaxially and fixedly connected with the flange plate 11; one end, far away from the flange plate 11, of the outer heat shielding cylinder 13 is fixedly connected to the outer side wall of the inner heat shielding cylinder, a first opening is formed in one end, far away from the flange plate 11, of the inner heat shielding cylinder, a gap is formed between the inner heat shielding cylinder and the outer heat shielding cylinder 13, and a heat shielding layer 9 is arranged in the gap close to the first opening;
the utility model discloses a heating device, including ring flange 11, internal heat shielding barrel, cathode plate 1, carbon film, heater 5, antidetonation inner core 4, the carbon film is equipped with between the internal heat shielding barrel, and the carbon film is on the cathode plate, and the carbon film is attached to the cathode plate 1 with the butt has been connected between the first opening, cathode plate 1 with be equipped with the carbon film between the internal heat shielding barrel, the carbon film is attached to the cathode plate through current means with the projection coincidence of internal heat shielding barrel at horizontal plane and vertical face on the part, heater 5 encircles the circumference lateral wall setting of antidetonation inner core 4 with the form of screw thread form, specifically, the screw thread groove has been seted up to the circumference lateral wall of antidetonation inner core 4, heater 5 closely laminates in the slot bottom of screw thread groove, the cross-sectional dimension of screw thread groove is greater than the cross-sectional dimension of heater, can make the heater be located the inside of screw thread groove completely like this. An anti-falling mechanism which enables the heater 5 not to fall off the thread groove is arranged on the outer side surface of the anti-seismic inner core 4, and the flange plate 11 extends out of the other end of the heater 5; and a support assembly for supporting the anti-seismic inner core 4 is fixedly arranged in the cavity of the inner heat shield cylinder.
Like this, cover a section of thick bamboo through setting up outer heat shield and interior heat shield, and set up the heat shield in the clearance of being close to first open-ended, can realize less thermal loss well, improve heating efficiency, thereby can reduce heating power, and simultaneously, set up the antidetonation inner core in the heat shield section of thick bamboo, the heating element laminating is in the thread groove of antidetonation inner core lateral wall, can fix the heating element better, it leads to the tungsten filament (being close to first open-ended tungsten filament) fracture of high temperature section at the motion in-process to have reduced the cathode electron source, the shock resistance of this cathode electron source has been improved, and simultaneously, avoid the cathode electron source when work, two point contact on the heating element leads to the short circuit.
In this embodiment, the material of the cathode sheet 1 is a hot cathode material, specifically, the hot cathode material includes, but is not limited to, lanthanum hexaboride.
Like this, adopt the lanthanum hexaboride that emission performance is good as the emitter, can make the utility model discloses a cathode electron source has the transmission stably, and emission current density is big, long service life's function.
The heater is made of tungsten heating wires. Specifically, the tungsten-based heating wire can be but is not limited to be made of tungsten-rhenium alloy, and the tungsten-rhenium alloy has better mechanical property and ductility and high resistivity compared with pure tungsten, so that the tungsten-rhenium alloy has better processability and weldability. The tungsten-rhenium alloy containing 3% rhenium can be used as core metal of electronic tube filament, grid wire and direct heating cathode.
The anti-seismic inner core is made of, but not limited to, alumina ceramic.
And an outer heat shielding cylinder and an inner heat shielding cylinder are arranged at the same time, so that the heat shielding function of the cathode electron source can be enhanced.
In this embodiment, the interior heat shield section of thick bamboo all is equipped with open-ended negative pole support section of thick bamboo 3 and the fixed section of thick bamboo 2 of negative pole from top to bottom, just the size of the fixed section of thick bamboo 2 of negative pole is greater than the size that the negative pole supported section of thick bamboo 3, the upper end opening of the fixed section of thick bamboo 2 of negative pole is first opening, the inside wall of the fixed section of thick bamboo 2 of negative pole with the lateral wall fixed connection of the fixed section of thick bamboo 3 of negative pole, just the fixed section of thick bamboo 2 of negative pole is located the top that the negative pole supported section of thick bamboo 3, the upper end opening of outer heat shield section of thick bamboo 13 with the lateral wall fixed connection of the fixed section of thick bamboo 2 of negative pole, negative pole piece 1 with the part that the projection of the negative pole support section of thick bamboo 3 coincides in the vertical plane is equipped with the carbon film, just the area of negative pole piece 1 is greater than the area of first opening.
Therefore, the carbon film is arranged at the projection superposition part of the cathode sheet and the cathode supporting cylinder on the vertical surface, so that the cathode sheet and the cathode supporting cylinder are prevented from directly contacting to cause high-temperature reaction when the electron source works. In this embodiment, the height of the upper surface of the cathode sheet 1 is flush with the upper end opening of the cathode supporting cylinder 3, the upper end surface of the cathode supporting cylinder 3 is fixedly connected with the bottom of the top wall of the cathode fixing cylinder 2, and a carbon film is disposed on the projection coincidence part of the upper surface of the cathode sheet 1 and the bottom of the top wall of the cathode fixing cylinder 2 on the horizontal plane.
Therefore, the carbon film is arranged at the part of the cathode sheet and the cathode fixing barrel, which is superposed on the projection of the horizontal plane, so that the high-temperature reaction caused by the direct contact of the cathode sheet and the cathode fixing barrel when the electron source works can be avoided.
In this embodiment, the supporting component includes fixing spacing inner tube 8 on the 3 inner walls of negative pole supporting cylinder, spacing inner tube 8 all is equipped with the opening from top to bottom, the top butt of spacing inner tube 8 has been used for supporting support top pearl 7 of antidetonation inner core 4, support top pearl 7 and all be equipped with the opening from top to bottom, just support top pearl 7 the opening with spacing inner tube 8's opening is coaxial to be set up, support top pearl 7 the top with the bottom butt of antidetonation inner core 4, the top of antidetonation inner core 4 with the bottom butt of negative pole piece 1.
The support nail beads are made of, but not limited to, alumina ceramics.
In this embodiment, the anti-disengaging mechanism include with antidetonation urceolus 6 that antidetonation inner core 4's lateral wall sliding fit set up, the inside wall of antidetonation urceolus 6 with antidetonation inner core 4's lateral wall contact, antidetonation urceolus 6 all is equipped with the opening from top to bottom, the opening of antidetonation urceolus 6 with support the coaxial setting of opening of top pearl 7, just the height of antidetonation urceolus 6 with antidetonation inner core 4's height is the same, runs through lateral wall upper portion of cathode supporting cylinder 3 and the lateral wall upper portion of antidetonation urceolus 6 are equipped with the confession heater 5 passes the through-hole, heater 5 passes the through-hole is fixed on the lateral wall of cathode supporting cylinder 3, the top and the bottom of antidetonation urceolus 6 respectively with negative pole piece 1 and support top pearl 7 butt. The anti-seismic outer barrel is made of but not limited to alumina ceramics.
In this embodiment, a flange hole is formed in the axis of the flange plate 11, a heat insulating top bead 10 is installed in the flange hole, openings are formed in the upper portion and the lower portion of the heat insulating top bead 10, the opening of the heat insulating top bead 10 and the cathode supporting cylinder 3 are coaxially arranged, and the heater 5 sequentially passes through the upper end opening and the lower end opening of the supporting top bead 7, the upper end opening and the lower end opening of the heat insulating top bead 10 and extends out of the flange plate 11.
The material of the heat-insulating top bead is not limited to alumina ceramics.
In this embodiment, the ring flange 11 is including being located the flange hole and the setting of 11 axle centers of ring flange departments of 11 bottoms of ring flange's draw-in groove, the flange hole with the inner chamber intercommunication of interior heat shielding section of thick bamboo, the bottom of draw-in groove with flange hole intercommunication, fixedly connected with stereoplasm card 12 in the draw-in groove is followed the central axis of an outer heat shielding section of thick bamboo 13 runs through stereoplasm card 12 is equipped with the confession the perforation that heater 5 passed, the cross-section in flange hole is "protruding" font, thermal-insulated overhead bead 10 is located in the flange is downthehole and pass through stereoplasm card 12 is fixed in the flange is downthehole. Specifically, the heat-insulating top bead 10 is located at the large hole of the flange hole in the shape of the letter "convex", and of course, the heat-insulating top bead may also be in the shape of a letter "convex" matching the letter "convex" of the flange hole.
The flange plate is made of stainless steel or nickel, and the hard clamping plate is made of ceramic.
In this embodiment, the material of outer heat shield section of thick bamboo 13, interior heat shield section of thick bamboo, heat shielding layer 9, spacing inner tube 8 can be but not limited to be the tantalum metal material, and tantalum metal has higher melting point, simultaneously, has good heat shielding function, can not produce a large amount of heats and arouse and the interior part of heat shield section of thick bamboo produces huge thermal stress because of absorbing radiant energy after and lead to the interior part of heat shield section of thick bamboo to damage.
The utility model discloses an assembly method does:
the cathode supporting cylinder and the outer heat shielding cylinder are welded on the flange plate.
Circular helicla flute has been seted up to antidetonation inner core, heater inseparable laminating slot bottom is around on the antidetonation inner core, the through-hole that a width is greater than the heater diameter is opened to the upper end of cathode support section of thick bamboo, the through-hole that the end was seted up is passed through to the one end of heater, extend to the cathode support section of thick bamboo outside and weld on the lateral wall of cathode support section of thick bamboo, the other end of heater is as the one end of the heating electrode who draws, wind to the axis position and extend downwards outside the ring flange, antidetonation urceolus sliding fit cover is in the outside of antidetonation inner core, and the antidetonation urceolus is the same with antidetonation inner core height.
Spacing inner tube passes through resistance welding welded joint and supports the inboard of a section of thick bamboo at the negative pole to support the lower terminal surface of the support apical pearl of top, the antidetonation inner core supports at support apical pearl up end with antidetonation urceolus lower extreme face.
The lower terminal surface of negative pole piece supports on the up end of antidetonation inner core with the antidetonation urceolus, and the fixed section of thick bamboo cooperation of negative pole supports the subassembly with the negative pole piece butt and fixes in a negative pole supports a section of thick bamboo, and the negative pole piece all adheres to with the carbon film with the position of the fixed section of thick bamboo of negative pole and the contact of negative pole support section of thick bamboo, avoids negative pole piece and the fixed section of thick bamboo of negative pole and negative pole support section of thick bamboo direct contact to take place the high temperature reaction. The lower end of the cathode fixing cylinder is welded with the outer side surface of the cathode supporting cylinder.
The hard card is welded in the clamping groove of the flange plate and used for fixing the heat-insulating top bead, and the heat-insulating top bead can play a role in insulating the leading-out end of the fixed electrode.
The above-mentioned embodiments further describe the objects, technical solutions and advantages of the present invention in detail, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. An indirect cathode electron source is characterized by comprising a flange plate (11), and an inner heat shielding cylinder and an outer heat shielding cylinder (13) which are coaxially and fixedly connected with the flange plate (11); one end, far away from the flange plate (11), of the outer heat shielding cylinder (13) is fixedly connected to the outer side wall of the inner heat shielding cylinder, a first opening is formed in one end, far away from the flange plate (11), of the inner heat shielding cylinder, a gap is formed between the inner heat shielding cylinder and the outer heat shielding cylinder (13), and a heat shielding layer (9) is arranged in the gap close to the first opening;
an anti-vibration inner core (4) and a heater (5) are arranged at one end, away from the flange plate (11), of the inner heat shielding barrel, a cathode plate (1) is abutted between the anti-vibration inner core (4) and the first opening, a carbon film is arranged between the cathode plate (1) and the inner heat shielding barrel, a threaded groove is formed in the circumferential side wall of the anti-vibration inner core (4), the heater (5) is tightly attached to the bottom of the threaded groove, an anti-disengaging mechanism enabling the heater (5) not to be disengaged from the threaded groove is arranged on the outer side surface of the anti-vibration inner core (4), one end of the heater (5) penetrates through the side wall of the inner heat shielding barrel and is fixedly connected to the outer side wall of the inner heat shielding barrel, and the other end of the heater (5) extends out of the flange plate (11); and a support assembly for supporting the anti-seismic inner core (4) is fixedly arranged in the cavity of the inner heat shield cylinder.
2. The indirect cathode electron source of claim 1, wherein the internal heat shielding cylinder comprises a cathode supporting cylinder (3) and a cathode fixing cylinder (2) both provided with openings at the upper and lower sides, the size of the cathode fixing cylinder (2) is larger than that of the cathode supporting cylinder (3), the upper opening of the cathode fixing cylinder (2) is a first opening, the inner side wall of the cathode fixing cylinder (2) is fixedly connected with the outer side wall of the cathode supporting cylinder (3), the cathode fixing cylinder (2) is located above the cathode supporting cylinder (3), the upper opening of the external heat shielding cylinder (13) is fixedly connected with the outer side wall of the cathode fixing cylinder (2), a carbon film is provided at a part where projections of the cathode sheet (1) and the cathode supporting cylinder (3) coincide in a vertical plane, and the area of the cathode sheet (1) is larger than that of the first opening.
3. An indirect cathode electron source according to claim 2, wherein the height of the upper surface of the cathode sheet (1) is flush with the upper opening of the cathode supporting cylinder (3), the upper surface of the cathode supporting cylinder (3) is fixedly connected with the bottom of the top wall of the cathode fixing cylinder (2), and a carbon film is arranged on the upper surface of the cathode sheet (1) and the projection of the bottom of the top wall of the cathode fixing cylinder (2) on the horizontal plane.
4. The indirect cathode electron source according to claim 2 or 3, wherein the support assembly comprises a limiting inner cylinder (8) fixed on the inner wall of the cathode support cylinder (3), the limiting inner cylinder (8) is provided with an opening from top to bottom, the top of the limiting inner cylinder (8) is abutted with a supporting top bead (7) for supporting the inner core (4), the supporting top bead (7) is provided with an opening from top to bottom, the opening of the supporting top bead (7) and the opening of the limiting inner cylinder (8) are coaxially arranged, the top of the supporting top bead (7) is abutted with the bottom of the anti-seismic inner core (4), and the top of the anti-seismic inner core (4) is abutted with the bottom of the cathode sheet (1).
5. The indirect cathode electron source according to claim 4, wherein the anti-dropping mechanism comprises an anti-seismic outer barrel (6) which is arranged in a sliding fit with the outer side wall of the anti-seismic inner core (4), the inner side wall of the anti-seismic outer barrel (6) is in contact with the outer side wall of the anti-seismic inner core (4), openings are formed in the upper and lower portions of the anti-seismic outer barrel (6), the opening of the anti-seismic outer barrel (6) is coaxially arranged with the opening of the supporting top bead (7), the height of the anti-seismic outer barrel (6) is the same as that of the anti-seismic inner core (4), a through hole for the heater (5) to pass through is formed in the upper portion of the side wall of the cathode supporting barrel (3) and the upper portion of the side wall of the anti-seismic outer barrel (6), the heater (5) passes through the through hole and is fixed on the outer side wall of the cathode supporting barrel (3), and the top and the bottom of the anti-seismic outer barrel (6) are respectively abutted to the cathode sheet (1) and the supporting top bead (7).
6. The indirect type cathode electron source according to claim 5, wherein a flange hole is formed in the axis of the flange plate (11), a heat insulation top bead (10) is installed in the flange hole, openings are formed in the upper portion and the lower portion of the heat insulation top bead (10), the opening of the heat insulation top bead (10) and the cathode supporting cylinder (3) are coaxially arranged, and the heater (5) sequentially passes through the upper end opening and the lower end opening of the supporting top bead (7) and the upper end opening and the lower end opening of the heat insulation top bead (10) to extend out of the flange plate (11).
7. The indirect cathode electron source of claim 6, wherein the flange (11) comprises a flange hole located at the axis of the flange (11) and a slot disposed at the bottom of the flange (11), the flange hole is communicated with the inner cavity of the inner heat shield, the bottom of the slot is communicated with the flange hole, a hard card (12) is fixedly connected in the slot, a through hole for the heater (5) to pass through is disposed through the hard card (12) along the central axis of the outer heat shield (13), the flange hole has a cross section in a shape of "convex", and the heat-insulating top bead (10) is located in the flange hole and is fixed in the flange hole through the hard card (12).
8. An indirect cathode electron source according to claim 6, wherein the cathode sheet (1) is made of a hot cathode material.
9. The indirect-type cathode electron source of claim 1, wherein the heater is made of tungsten heating wires.
10. The indirect cathode electron source according to claim 1, wherein the outer heat shielding cylinder (13), the inner heat shielding cylinder, the heat shielding layer (9) and the limiting inner cylinder (8) are all made of tantalum metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221313898.4U CN217641200U (en) | 2022-05-26 | 2022-05-26 | Indirect-heating cathode electron source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221313898.4U CN217641200U (en) | 2022-05-26 | 2022-05-26 | Indirect-heating cathode electron source |
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| Publication Number | Publication Date |
|---|---|
| CN217641200U true CN217641200U (en) | 2022-10-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221313898.4U Active CN217641200U (en) | 2022-05-26 | 2022-05-26 | Indirect-heating cathode electron source |
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| CN (1) | CN217641200U (en) |
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- 2022-05-26 CN CN202221313898.4U patent/CN217641200U/en active Active
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