Feed-in device for microwave grid-control hot cathode electron injector and feed method

Abstract

The invention provides a feeder for a microwave grid-control hot cathode electron injector and a feeding method, and relates to the field of industrial application of electron accelerators. Comprising an isolation shell, a ground potential metal cover plate, a radio-frequency signal transmitting assembly, a radio-frequency signal receiving assembly, a direct-current signal feed-in assembly, a ground potential isolation plate, a high-voltage potential isolation plate and a high-voltage potential metal cover plate. The isolation shell, the ground potential isolation plate and the high-voltage potential isolation plate are used for isolating a ground potential and a high-voltage potential; the radio-frequency signal transmitting assembly is electrically connected with the ground potential metal cover plate and transmits a radio-frequency signal of the ground potential to the high-voltage potential. The radio-frequency signal source does not need to be placed on a high-voltage platform, the radio-frequency signal of the ground potential is isolated from the direct-current signal of the high-voltage potential, and the radio-frequency signal source and a power source system are prevented from being damaged due to the influence of high-voltage ignition.

Description

Technical Field

[0001] The invention relates to the field of industrial application of electron accelerators, and in particular to a feeder and a feeding method for a microwave grid-controlled hot cathode electron injector. Background Art

[0002] With the widespread application of electron beam irradiation technology, industrial electron accelerators have demonstrated efficient and reliable processing capabilities in the fields of material modification, irradiation sterilization, wastewater treatment, etc. As the core component of the production of electron accelerators, electron injectors (i.e. electron guns) play a vital role. In order to ensure the efficient operation of electron accelerators, the parameters of electron injectors are relatively high.

[0003] The electron injectors used in high-power industrial electron accelerators generally use microwave-controlled hot cathode electron injectors. Microwave-controlled hot cathode electron injectors include a cathode grid assembly, an anode, and RF and DC signal feeders. When emitting a beam, the RF signal at the ground potential and the DC signal at the high voltage potential need to be fed into the input port of the cathode grid assembly.

[0004] However, the cathode grid component itself is at a negative high voltage potential of tens of kilovolts compared to the ground potential, and the RF signal source and the DC signal source need to be placed on a high voltage platform. The RF power amplifier of the RF signal source may be damaged by high voltage sparks, thereby damaging the expensive power source system. Summary of the invention

[0005] The present invention provides a feeder and a feeding method for a microwave gate-controlled hot cathode electron injector, which solves the problem that a radio frequency signal source and a direct current signal source are placed on a high-voltage platform, and a radio frequency power amplifier of the radio frequency signal source may be damaged due to high voltage sparking, thereby damaging an expensive power source system.

[0006] The present invention provides a feeder for a microwave-controlled hot cathode electron injector, comprising an isolation shell, a ground potential metal cover, a radio frequency signal transmitting component, a radio frequency signal receiving component, a direct current signal feeding component, a ground potential isolation plate, a high voltage potential isolation plate and a high voltage potential metal cover, wherein the ground potential metal cover, the radio frequency signal transmitting component and the ground potential isolation plate are sequentially arranged on one side of the isolation shell, and the high voltage potential isolation plate, the radio frequency signal receiving component, the direct current signal feeding component and the high voltage potential metal cover are sequentially arranged on the other side of the isolation shell; The isolation housing, the ground potential isolation plate and the high voltage potential isolation plate are used to isolate the ground potential from the high voltage potential; The radio frequency signal transmitting component is electrically connected to the ground potential metal cover plate, and is used to transmit the radio frequency signal at the ground potential to the high voltage potential; The radio frequency signal receiving component is electrically connected to the high voltage potential metal cover plate, and is used to transmit the received radio frequency signal to the high voltage potential metal cover plate; The high-voltage potential metal cover plate is used to cooperate with the DC signal feeding component to output the radio frequency signal and the DC signal to the cathode grid component of the microwave grid-controlled hot cathode electron injector; Wherein, the high voltage potential is determined based on the operating voltage of the microwave gate-controlled hot cathode electron injector.

[0007] According to a feeder for a microwave gate-controlled hot cathode electron injector provided by the present invention, the DC signal feed assembly comprises a grid voltage high-voltage cable, a grid voltage high-voltage cable terminal, a DC heating loop high-voltage cable, a DC heating loop high-voltage cable terminal and a coaxial connector; One end of the gate voltage high-voltage cable passes through the isolation housing to receive the gate voltage, and the other end is arranged inside the isolation housing and connected to the gate voltage high-voltage cable terminal; The gate voltage high-voltage cable terminal is connected to the radio frequency signal receiving component, and is used to transmit the gate voltage to the high-voltage potential metal cover plate via the radio frequency signal receiving component, and use the high-voltage potential metal cover plate as a gate voltage contact; One end of the DC heating circuit high-voltage cable passes through the isolation shell, and the other end is connected to the DC heating circuit high-voltage cable terminal, the DC heating circuit high-voltage cable terminal is connected to the coaxial connector, and the coaxial connector is connected to the cathode grid assembly. The DC heating circuit high-voltage cable, the DC heating circuit high-voltage cable terminal and the coaxial connector are used to supply power to the heater in the cathode grid assembly.

[0008] According to a feeder for a microwave gate-controlled hot cathode electron injector provided by the present invention, the DC heating loop high-voltage cable includes a heating wire input current high-voltage cable and a heating wire output current high-voltage cable, the DC heating loop high-voltage cable terminal includes a heating wire input current high-voltage cable terminal and a heating wire output current high-voltage cable terminal, the coaxial joint is provided with a cathode heating wire current input contact and a cathode heating wire current output contact, the heating wire input current high-voltage cable terminal is respectively connected to the heating wire input current high-voltage cable and the cathode heating wire current input contact, and the heating wire output current high-voltage cable terminal is respectively connected to the heating wire output current high-voltage cable and the cathode heating wire current output contact.

[0009] According to a feeder for a microwave gate-controlled hot cathode electron injector provided by the present invention, a coaxial contact isolation support is provided between the cathode heating wire current input contact and the cathode heating wire current output contact.

[0010] According to a feeder for a microwave gate-controlled hot cathode electron injector provided by the present invention, the gate voltage high-voltage cable and the DC heating loop high-voltage cable are both made of single-layer cables.

[0011] According to a feeder for a microwave gate-controlled hot cathode electron injector provided by the present invention, the radio frequency signal transmitting component comprises a ground potential radio frequency input connector and a ground end radio frequency signal transmitting coil, the ground potential radio frequency input connector is arranged on the ground potential metal cover plate, and the ground end radio frequency signal transmitting coil is arranged on the side of the ground potential isolation plate facing the ground potential metal cover plate; The ground potential RF input connector is used to receive a ground potential RF signal and transmit it to the ground end RF signal transmitting coil; The ground-end radio frequency signal transmitting coil is used to transmit radio frequency signals at ground potential.

[0012] According to a feeder for a microwave gate-controlled hot cathode electron injector provided by the present invention, the RF signal receiving component includes a high-voltage end RF signal receiving coil, the shape of the high-voltage end RF signal receiving coil is determined based on the shape of the ground end RF signal transmitting coil, and is arranged on the side of the high-voltage potential isolation plate facing the high-voltage potential metal cover plate.

[0013] According to a feeder for a microwave gate-controlled hot cathode electron injector provided by the present invention, a cavity for accommodating insulating gas is provided between the ground potential isolation plate and the high voltage potential isolation plate to improve the voltage isolation effect.

[0014] According to a feeder for a microwave gate-controlled hot cathode electron injector provided by the present invention, the isolation shell, the ground potential isolation plate and the high voltage potential isolation plate are all made of polytetrafluoroethylene material, and the insulating gas includes sulfur hexafluoride gas.

[0015] The present invention also provides a feeding method for a microwave-gated hot cathode electron injector, comprising feeding a cathode grid assembly with a feeder for a microwave-gated hot cathode electron injector based on any one of the above.

[0016] The feeder and feeding method for a microwave gate-controlled hot cathode electron injector provided by the present invention transmit the radio frequency signal of the ground potential to the high voltage potential through the radio frequency signal transmitting component and the radio frequency signal receiving component, and there is no need to place the radio frequency signal source on the high voltage platform. In addition, by providing an isolation shell, a ground potential isolation plate and a high voltage potential isolation plate, the radio frequency signal of the ground potential is isolated from the DC signal of the high voltage potential, thereby preventing the radio frequency signal source and the power source system from being damaged by the influence of high voltage sparking. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is one of the structural schematic diagrams of the feeder for the microwave gate-controlled hot cathode electron injector provided by the present invention.

[0019] Figure 2 This is the second structural schematic diagram of the feeder for the microwave gate-controlled hot cathode electron injector provided by the present invention.

[0020] Figure 3 It is a schematic diagram of the vertical cross-sectional structure of a feeder for a microwave-gated hot cathode electron injector provided by the present invention.

[0021] Figure 4 The diagram is a horizontal cross-sectional structural diagram of a feeder for a microwave-gated hot cathode electron injector provided by the present invention.

[0022] Figure 5 It is a structural schematic diagram of a ground-end radio frequency signal transmitting coil and a high-voltage-end radio frequency signal receiving coil provided by the present invention.

[0023] In the figure, 1-isolation shell, 2-high voltage potential isolation plate, 3-high voltage potential metal cover, 4-cathode heating wire current input contact, 5-cathode heating wire current output contact, 6-coaxial contact isolation support, 7-heating wire output current high voltage cable terminal, 8-heating wire input current high voltage cable terminal, 9-gate voltage high voltage cable terminal, 10-high voltage end RF signal receiving coil, 11-cavity, 12-ground potential isolation plate, 13-ground potential metal cover, 14-ground potential RF input connector, 15-ground end RF signal transmitting coil, 16-heating wire input current high voltage cable, 17-heating wire output current high voltage cable, 18-gate voltage high voltage cable. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] like Figure 1-Figure 4As shown, the present invention provides a feeder for a microwave gate-controlled hot cathode electron injector, including an isolation shell 1, a ground potential metal cover plate 13, a radio frequency signal transmitting component, a radio frequency signal receiving component, a DC signal feeding component, a ground potential isolation plate 12, a high voltage potential isolation plate 2 and a high voltage potential metal cover plate 3.

[0026] The ground potential metal cover plate 13, the RF signal transmitting component and the ground potential isolation plate 12 are arranged on one side of the isolation housing 1 from left to right, and the high voltage potential isolation plate 2, the RF signal receiving component, the DC signal feeding component and the high voltage potential metal cover plate 3 are arranged on the other side of the isolation housing 1 from left to right. Figure 3 and Figure 4 shown.

[0027] The isolation shell 1 is a high-voltage isolation shell with a smooth outer surface, which wraps the high-voltage potential metal cover plate 3 and the ground potential metal cover plate 13 to form a receiving cavity, which contains the ground potential isolation plate 12 and the high-voltage potential isolation plate 2. The isolation shell 1, the ground potential isolation plate 12 and the high-voltage potential isolation plate 2 are used to isolate the ground potential from the high-voltage potential. The high-voltage potential is determined based on the working voltage of the microwave gate-controlled hot cathode electron injector.

[0028] The RF signal transmitting component is electrically connected to the ground potential metal cover plate 13, and is used to transmit the RF signal at the ground potential to the high voltage potential. The RF signal receiving component is electrically connected to the high voltage potential metal cover plate 3, and is used to transmit the received RF signal to the high voltage potential metal cover plate 3. The high voltage potential metal cover plate 3 is used to cooperate with the DC signal feeding component to output the RF signal and the DC signal to the cathode grid component of the microwave grid-controlled hot cathode electron injector.

[0029] The RF signal transmitting component emits an alternating magnetic field, and wirelessly transmits the RF signal at ground potential to the RF signal receiving component by magnetic coupling, and then transmits it from the ground potential to the high voltage, and then transmits it to the high voltage potential metal cover plate 3 via the RF signal receiving component. The high voltage potential metal cover plate 3 and the DC signal feeding component superimpose the DC signal transmitted from the high voltage platform and the RF signal of a certain power and frequency at the ground end, and input them into the microwave gate-controlled hot cathode electron injector at the same time.

[0030] It can be understood that the present invention transmits the RF signal at ground potential to the high voltage potential through the RF signal transmitting component and the RF signal receiving component, and there is no need to place the RF signal source on the high voltage platform. In addition, by providing an isolation shell 1, a ground potential isolation plate 12 and a high voltage potential isolation plate 2, the RF signal at ground potential is isolated from the DC signal at high voltage potential, thereby preventing the RF signal source and the power source system from being damaged by high voltage sparking.

[0031] Based on the above embodiment, as an optional embodiment, the DC signal feeding component includes a gate voltage high-voltage cable 18, a gate voltage high-voltage cable terminal 9, a DC heating loop high-voltage cable, a DC heating loop high-voltage cable terminal and a coaxial connector.

[0032] One end of the gate voltage high-voltage cable 18 passes through the isolation housing 1 for receiving the gate voltage, and the other end is arranged inside the isolation housing 1 and connected to the gate voltage high-voltage cable terminal 9 .

[0033] The gate voltage high-voltage cable terminal 9 is connected to the radio frequency signal receiving component, and is used to transmit the gate voltage to the high-voltage potential metal cover plate 3 via the radio frequency signal receiving component, and use the high-voltage potential metal cover plate 3 as a gate voltage contact.

[0034] One end of the DC heating circuit high-voltage cable passes through the isolation shell 1, and the other end is connected to the DC heating circuit high-voltage cable terminal, the DC heating circuit high-voltage cable terminal is connected to the coaxial connector, and the coaxial connector is connected to the cathode grid assembly. The DC heating circuit high-voltage cable, the DC heating circuit high-voltage cable terminal and the coaxial connector are used to supply power to the heater in the cathode grid assembly.

[0035] Optionally, the DC heating loop high-voltage cable includes a heating wire input current high-voltage cable 16 and a heating wire output current high-voltage cable 17, and the DC heating loop high-voltage cable terminal includes a heating wire input current high-voltage cable terminal 8 and a heating wire output current high-voltage cable terminal 7, and the coaxial connector is provided with a cathode heating wire current input contact 4 and a cathode heating wire current output contact 5, and the heating wire input current high-voltage cable terminal 8 is respectively connected to the heating wire input current high-voltage cable 16 and the cathode heating wire current input contact 4, and the heating wire output current high-voltage cable terminal 7 is respectively connected to the heating wire output current high-voltage cable 17 and the cathode heating wire current output contact 5.

[0036] Optionally, a protrusion can be set at the connection between the high-voltage potential metal cover plate 3 and the coaxial connector, and the protrusion can be used as a gate voltage contact. The gate voltage contact, the cathode heating wire current input contact 4 and the cathode heating wire current output contact 5 form a three-circle coaxial structure. The size of the coaxial structure depends on the structural size of the cathode grid assembly.

[0037] Optionally, a coaxial contact isolation support 6 is provided between the cathode heating wire current input contact 4 and the cathode heating wire current output contact 5. The coaxial contact isolation is usually made of insulating materials such as polytetrafluoroethylene, which can isolate the cathode heating wire current input contact 4 and the cathode heating wire current output contact 5 to avoid short circuit.

[0038] Optionally, the grid voltage high-voltage cable 18 and the DC heating loop high-voltage cable are both made of single-layer cables, including polytetrafluoroethylene or silicone insulation layers, and need to have sufficient withstand voltage value.

[0039] The cathode power supply and grid power supply of the electron injector are both located in the negative high voltage potential high voltage platform, and the radio frequency signal is generated by the radio frequency power source located at the ground potential. The cathode heating wire current input contact 4 and the cathode heating wire current output contact 5 are respectively connected to the two ends of the hot cathode heating wire in the cathode grid component. The hot cathode heating wire input current generated by the cathode power supply is transmitted to the heating wire of the cathode grid component through the heating wire input current high voltage cable 16, the heating wire input current high voltage cable terminal 8 and the heating wire current input contact. The heating wire output current is transmitted by the heating wire current output contact, the heating wire output current high voltage cable terminal 7 and the heating wire output current high voltage cable 17, thereby forming a circuit for powering the hot cathode heating wire. The grid voltage loaded on the grid in the cathode grid component is applied by the grid voltage high voltage cable 18, the grid voltage high voltage cable terminal 9 and the high voltage potential metal cover plate 3, and the grid voltage is generated by the grid power supply.

[0040] It is understandable that if a multi-layer coaxial cable is used to feed multiple signals at the same time, the coaxial cable and the shielding layer are prone to breakdown, and the multi-layer coaxial cable has a high cost and high requirements for the manufacturing process. The present invention uses independent single-layer cables to feed DC signals separately, without the need to use coaxial cables with more complex structures, effectively solving the problems of difficult coaxial cable processing and manufacturing, easy breakdown of the insulation layer, and complex feeder structure, and difficulty in design and manufacturing.

[0041] like Figure 5 As shown, based on the above embodiment, as an optional embodiment, the RF signal transmitting component includes a ground potential RF input connector 14 and a ground end RF signal transmitting coil 15, the ground potential RF input connector 14 is arranged on the ground potential metal cover plate 13, and the ground end RF signal transmitting coil 15 is arranged on the side of the ground potential isolation plate 12 facing the ground potential metal cover plate 13.

[0042] The ground potential RF input connector 14 is used to receive a ground potential RF signal and transmit it to the ground end RF signal transmitting coil 15; the ground end RF signal transmitting coil 15 is used to transmit a ground potential RF signal.

[0043] Optionally, the RF signal receiving component includes a high-voltage RF signal receiving coil 10, the shape of which is determined based on the shape of the ground-end RF signal transmitting coil 15, and is arranged on the side of the high-voltage potential isolation plate 2 facing the high-voltage potential metal cover plate 3.

[0044] It can be understood that the present invention uses two sets of coils to transmit the ground potential RF signal to the high voltage potential by magnetic coupling, and the RF voltage of a certain frequency is superimposed on the grid voltage and input into the grid of the cathode grid component, thereby achieving the effect of RF modulation. It can effectively improve the RF transmission efficiency, reduce the overheating problem caused by RF loss, and save costs to a certain extent.

[0045] On the basis of the above embodiment, as an optional embodiment, a cavity 11 for accommodating insulating gas is provided between the ground potential isolation plate 12 and the high voltage potential isolation plate 2 to improve the voltage isolation effect.

[0046] Optionally, the isolation housing 1, the ground potential isolation plate 12 and the high voltage potential isolation plate 2 are all made of polytetrafluoroethylene material PTFE, and the insulating gas includes sulfur hexafluoride gas.

[0047] It is understandable that the present invention adopts a combination of polytetrafluoroethylene and sulfur hexafluoride gas, which reduces the manufacturing cost while further improving the ability to isolate high voltage. The metal cover plate of the ground potential and the high voltage potential is wrapped in an isolation shell 1 made of PTFE material, and the cavity 11 is located in the center of the isolation shell 1, between the high voltage end and the ground end, and is filled with sulfur hexafluoride gas, which greatly improves the electrical breakdown strength of the entire feeder, so that the feeder has excellent insulation performance. In addition, since the dielectric constant of PTFE is about 2.0, it has extremely low signal loss at radio frequency and microwave frequencies, which improves the radio frequency transmission efficiency and anti-interference ability to a certain extent, and makes the structure of the entire feeder simpler, and the radio frequency transmission components are simple to repair and replace, with lower costs.

[0048] In summary, the feeder provided by the present invention is regarded as a set of RF transmitters and receivers with high voltage isolation function. Without affecting the transmission of RF signals, it effectively blocks negative high voltage, prevents the RF power source at ground potential from being damaged by high voltage, solves the overheating problem caused by RF loss induced by electrode plates / capacitors, and effectively reduces the difficulty and cost of processing and manufacturing, achieving miniaturization, which meets the needs of compact industrial electron accelerators.

[0049] The feeding method for a microwave gate-controlled hot cathode electron injector provided by the present invention is described below. The feeding method for a microwave gate-controlled hot cathode electron injector described below and the feeder for a microwave gate-controlled hot cathode electron injector described above can be referred to each other.

[0050] The present invention also provides a feeding method for a microwave gate-controlled hot cathode electron injector, comprising feeding a cathode grid assembly based on a feeder for a microwave gate-controlled hot cathode electron injector as described in any one of the items, which can greatly reduce the control difficulty of the cathode grid assembly, while taking into account the performance of high-voltage isolation and radio frequency transmission and reducing the overall size of the electron injector, so that the electron injector has more and wider applications, such as petal-shaped electron accelerators with relatively high compactness requirements.

[0051] As an embodiment, the DC signal feeding component includes a gate voltage high-voltage cable, a gate voltage high-voltage cable terminal, a DC heating loop high-voltage cable, a DC heating loop high-voltage cable terminal and a coaxial connector; One end of the gate voltage high-voltage cable passes through the isolation housing to receive the gate voltage, and the other end is arranged inside the isolation housing and connected to the gate voltage high-voltage cable terminal; The gate voltage high-voltage cable terminal is connected to the radio frequency signal receiving component, and is used to transmit the gate voltage to the high-voltage potential metal cover plate via the radio frequency signal receiving component, and use the high-voltage potential metal cover plate as a gate voltage contact; One end of the DC heating circuit high-voltage cable passes through the isolation shell, and the other end is connected to the DC heating circuit high-voltage cable terminal, the DC heating circuit high-voltage cable terminal is connected to the coaxial connector, and the coaxial connector is connected to the cathode grid assembly. The DC heating circuit high-voltage cable, the DC heating circuit high-voltage cable terminal and the coaxial connector are used to supply power to the heater in the cathode grid assembly.

[0052] As an embodiment, the DC heating loop high-voltage cable includes a heating wire input current high-voltage cable and a heating wire output current high-voltage cable, and the DC heating loop high-voltage cable terminal includes a heating wire input current high-voltage cable terminal and a heating wire output current high-voltage cable terminal, and the coaxial connector is provided with a cathode heating wire current input contact and a cathode heating wire current output contact, and the heating wire input current high-voltage cable terminal is respectively connected to the heating wire input current high-voltage cable and the cathode heating wire current input contact, and the heating wire output current high-voltage cable terminal is respectively connected to the heating wire output current high-voltage cable and the cathode heating wire current output contact.

[0053] As an embodiment, a coaxial contact isolation support is provided between the cathode heating wire current input contact and the cathode heating wire current output contact.

[0054] As an embodiment, the gate voltage high-voltage cable and the DC heating loop high-voltage cable are both made of single-layer cables.

[0055] As an embodiment, the RF signal transmitting component includes a ground potential RF input connector and a ground end RF signal transmitting coil, wherein the ground potential RF input connector is arranged on the ground potential metal cover plate, and the ground end RF signal transmitting coil is arranged on the side of the ground potential isolation plate facing the ground potential metal cover plate; The ground potential RF input connector is used to receive a ground potential RF signal and transmit it to the ground end RF signal transmitting coil; The ground-end radio frequency signal transmitting coil is used to transmit radio frequency signals at ground potential.

[0056] As an embodiment, the RF signal receiving component includes a high-voltage end RF signal receiving coil, the shape of which is determined based on the shape of the ground end RF signal transmitting coil, and is arranged on the side of the high-voltage potential isolation plate facing the high-voltage potential metal cover plate.

[0057] As an embodiment, a cavity for accommodating insulating gas is provided between the ground potential isolation plate and the high voltage potential isolation plate to improve the voltage isolation effect.

[0058] As an embodiment, the isolation housing, the ground potential isolation plate and the high voltage potential isolation plate are all made of polytetrafluoroethylene material, and the insulating gas includes sulfur hexafluoride gas.

[0059] It should be noted that the feeding method for a microwave gate-controlled hot cathode electron injector provided by the present invention is implemented based on the feeder described in any of the above embodiments, and has the technical effect corresponding to the feeder, which will not be elaborated in this embodiment.

[0060] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0061] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0062] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0063] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A feeder for a microwave-gated hot cathode electron injector, characterized in that: It comprises an isolation shell, a ground potential metal cover, a radio frequency signal transmitting component, a radio frequency signal receiving component, a direct current signal feeding component, a ground potential isolation plate, a high voltage potential isolation plate and a high voltage potential metal cover, wherein the ground potential metal cover, the radio frequency signal transmitting component and the ground potential isolation plate are sequentially arranged on one side of the isolation shell, and the high voltage potential isolation plate, the radio frequency signal receiving component, the direct current signal feeding component and the high voltage potential metal cover are sequentially arranged on the other side of the isolation shell; The isolation housing, the ground potential isolation plate and the high voltage potential isolation plate are used to isolate the ground potential from the high voltage potential; The radio frequency signal transmitting component is electrically connected to the ground potential metal cover plate, and is used to transmit the radio frequency signal at the ground potential to the high voltage potential; The radio frequency signal receiving component is electrically connected to the high voltage potential metal cover plate, and is used to transmit the received radio frequency signal to the high voltage potential metal cover plate; The high-voltage potential metal cover plate is used to cooperate with the DC signal feeding component to output the radio frequency signal and the DC signal to the cathode grid component of the microwave grid-controlled hot cathode electron injector; Wherein, the high voltage potential is determined based on the operating voltage of the microwave gate-controlled hot cathode electron injector.

2. The feeder for a microwave-gated hot cathode electron injector according to claim 1, characterized in that: The DC signal feeding component includes a gate voltage high-voltage cable, a gate voltage high-voltage cable terminal, a DC heating loop high-voltage cable, a DC heating loop high-voltage cable terminal and a coaxial connector; One end of the gate voltage high-voltage cable passes through the isolation housing to receive the gate voltage, and the other end is arranged inside the isolation housing and connected to the gate voltage high-voltage cable terminal; The gate voltage high-voltage cable terminal is connected to the radio frequency signal receiving component, and is used to transmit the gate voltage to the high-voltage potential metal cover plate via the radio frequency signal receiving component, and use the high-voltage potential metal cover plate as a gate voltage contact; One end of the DC heating circuit high-voltage cable passes through the isolation shell, and the other end is connected to the DC heating circuit high-voltage cable terminal, the DC heating circuit high-voltage cable terminal is connected to the coaxial connector, and the coaxial connector is connected to the cathode grid assembly. The DC heating circuit high-voltage cable, the DC heating circuit high-voltage cable terminal and the coaxial connector are used to supply power to the heater in the cathode grid assembly.

3. The feeder for a microwave-gated hot cathode electron injector according to claim 2, characterized in that: The DC heating loop high-voltage cable includes a heating wire input current high-voltage cable and a heating wire output current high-voltage cable, and the DC heating loop high-voltage cable terminal includes a heating wire input current high-voltage cable terminal and a heating wire output current high-voltage cable terminal, and the coaxial connector is provided with a cathode heating wire current input contact and a cathode heating wire current output contact, and the heating wire input current high-voltage cable terminal is respectively connected to the heating wire input current high-voltage cable and the cathode heating wire current input contact, and the heating wire output current high-voltage cable terminal is respectively connected to the heating wire output current high-voltage cable and the cathode heating wire current output contact.

4. The feeder for a microwave-gated hot cathode electron injector according to claim 3, characterized in that: A coaxial contact isolation support is provided between the cathode heating wire current input contact and the cathode heating wire current output contact.

5. The feeder for a microwave-gated hot cathode electron injector according to any one of claims 2 to 4, characterized in that: The grid voltage high-voltage cable and the DC heating loop high-voltage cable are both made of single-layer cables.

6. The feeder for a microwave-gated hot cathode electron injector according to claim 1, characterized in that: The RF signal transmitting assembly comprises a ground potential RF input connector and a ground end RF signal transmitting coil, wherein the ground potential RF input connector is arranged on the ground potential metal cover plate, and the ground end RF signal transmitting coil is arranged on the side of the ground potential isolation plate facing the ground potential metal cover plate; The ground potential RF input connector is used to receive a ground potential RF signal and transmit it to the ground end RF signal transmitting coil; The ground-end radio frequency signal transmitting coil is used to transmit radio frequency signals at ground potential.

7. The feeder for a microwave-gated hot cathode electron injector according to claim 6, characterized in that: The RF signal receiving component includes a high-voltage RF signal receiving coil, the shape of which is determined based on the shape of the ground-end RF signal transmitting coil, and is arranged on the side of the high-voltage potential isolation plate facing the high-voltage potential metal cover plate.

8. The feeder for a microwave-gated hot cathode electron injector according to any one of claims 1 to 4, 6 to 7, characterized in that: A cavity for accommodating insulating gas is provided between the ground potential isolation plate and the high voltage potential isolation plate to improve the voltage isolation effect.

9. The feeder for a microwave-gated hot cathode electron injector according to claim 8, characterized in that: The isolation shell, the ground potential isolation plate and the high voltage potential isolation plate are all made of polytetrafluoroethylene material, and the insulating gas includes sulfur hexafluoride gas.

10. A feeding method for a microwave gate-controlled hot cathode electron injector, characterized in that: The invention comprises feeding power to the cathode grid assembly by a feeder for a microwave-grid-controlled hot cathode electron injector according to any one of claims 1 to 9.

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