W波段永磁包装高次谐波潘尼管的研究
发布时间：2018-08-23 11:46
【摘要】：回旋管是毫米波波段最有发展前途的中、高功率、高效率器件之一,高功率回旋管成功地应用于核聚变等离子体回旋谐振加热中,同时回旋管在毫米波陶瓷烧结、材料加工、毫米波通信、毫米波武器(主动拒止系统)以及高分辨率雷达方面有着广泛的应用前景。短毫米波回旋管的严重不足是必须要使用超导磁体,由于其价格昂格,系统复杂,启动时间长,限制了回旋管在很多情况下的应用效果。潘尼管是另一类还未充分研究、应用的回旋器件,大量研究表明,它具有效率高,可高次谐波工作,因此具有可以实现永磁包装而不用超导磁体的潜在优势受到人们的高度重视。目前日本学者研制的潘尼管获得了W波段的微波辐射,美国学者也有研制Ka波段实用潘尼管的详细计划和实验结果,但是目前都还没有研制W波段实用样管的报道。近几年来,电子科技大学强辐射实验也开展了潘尼管的研究,进行了Ka波段3次谐波潘尼管的设计和大回旋电子枪的探索。根据对需求背景和可能性的分析,决定以研制W波段10kW量级的永磁包装潘尼管作为实验室的近期任务,同时该项目也受到国家自然科学基金的大力支持。本文以研制W波段10kW量级永磁包装潘尼管器件为目标,对器件总体方案的选择,注波互作用系统的理论分析与设计,永磁系统的设计,电子光学系统的设计,冷、热测系统设计和测试方法进行了系统深入的研究,实际加工了高频腔体并进行了冷测实验,得到了与理论计算基本符合的结果。在潘尼管总体方案选择上,兼顾永磁材料性能与器件效率,提出了6次谐波永磁包装磁控型潘尼管方案。高次谐波潘尼管主要是深入研究7开槽谐振腔中的模式竞争问题,证明其6次谐波2π模单模稳定工作的可能性,设计了相应的谐振腔并进行了器件的PIC全电磁粒子模拟,给出了功率达30k W,效率达40%的W波段6次谐波潘尼管参量设计。同时编制潘尼管的自洽非线性大信号计算程序,并用以深入研究了引导中心偏移、速度离散等因素对潘尼管性能的影响,表明在引导中心偏移不大于8%,相对纵向速度离散不大于8%,该器件的功率仍可达10千瓦,效率为17%,从而确定了W波段实用潘尼管对电子束质量的最低要求。潘尼管永磁包装系统研究了利用现已掌握径向极化永磁体技术制作潘尼管所需永磁体的可行性,并设计了一个结构紧凑的永磁体,虽然其磁场分布有缺点,但其特殊缓变倒向磁场和工作均匀区磁场基本可以分别满足产生大回旋电子注和实现潘尼管注波互作用的磁场要求。潘尼管大回旋电子枪是在上述永磁体可能得到的磁场分布下,运用一种新的设计理念,设计了适应这种特殊倒向场的大回旋电子枪,据模拟计算获得引导中心偏移为5.4%,纵向速度离散为6.9%,横向速度零散为1.3%,和速度比为2的大回旋电子注,该设计的大回旋电子束完全满足潘尼管工作的基本要求。论文同时深入研究了这种紧凑型永磁体的特殊磁场下电子注的流通规律,提出了在工作情况下监测电子枪的工作状态和优化电子束参量的实用方法。W波段永磁包装潘尼管测试技术及系统研究主要是对W波段永磁包装潘尼管进行系统设计,同时分别设计了潘尼管冷测实验用矩形TE10模式圆波导TE01模式转换器和圆波导TE01模式矩形TE10模式的诊断耦合腔,以此用来测试潘尼管的Q值以及确定潘尼管的工作模式,所得测试结果与预期基本一致。论文最终设计出W波段永磁包装高次谐波潘尼管的结构框架,并搭建了W波段永磁包装潘尼管系统热测试平台,整个潘尼管热测实验正处于积极的筹备当中。
[Abstract]:Gyrotron is one of the most promising high-power and high-efficiency devices in millimeter wave band. High-power gyrotron has been successfully used in nuclear fusion plasma gyrotron resonance heating. At the same time, gyrotron is used in millimeter wave ceramic sintering, material processing, millimeter wave communication, millimeter wave weapon (active stop system) and high-resolution radar. The shortage of short millimeter wave gyrotron is that it must use superconducting magnet. Because of its high price, complex system and long start-up time, the application effect of gyrotron is limited in many cases. The potential advantages of permanent magnet packaging without superconducting magnets have attracted much attention due to its ability to work in high-order harmonics. At present, Panitrons developed by Japanese scholars have obtained W-band microwave radiation, and American scholars have also made detailed plans and experimental results for developing Ka-band practical panitrons. However, no W-band practical panitrons have been developed yet. In recent years, the strong radiation experiment of the University of Electronic Science and Technology has also carried out the research of the Panitron, carried out the design of the Ka-band third harmonic Panitron and the exploration of the large cyclotron electron gun. This project is supported by the National Natural Science Foundation of China. In this paper, we aim to develop a W-band 10 kW permanent magnet packaged panitron device. We choose the overall scheme of the device, analyze and design the beam-wave interaction system, design the permanent magnet system, design the electronic optical system, design the cold and thermal measurement system and so on. The test method is studied systematically and thoroughly, the high frequency cavity is fabricated and the cold test experiment is carried out, and the results are basically in agreement with the theoretical calculation. In the overall scheme selection of the panitron, the magnetic control panitron with 6th harmonic permanent magnet packaging is proposed, which takes into account both the performance of the permanent magnet material and the efficiency of the device. The mode competition in a 7-Slot resonator is studied in depth to prove the possibility of stable operation of the 6th harmonic 2pi mode. The corresponding resonator is designed and the PIC full electromagnetic particle simulation of the device is carried out. The parameter design of the 6th harmonic Panitron in W-band with power up to 30kW and efficiency up to 40% is given. The large signal calculation program is used to study the influence of the guiding center offset and the velocity dispersion on the performance of the Panitron. The results show that the power of the device can still reach 10 kW and the efficiency is 17%, when the guiding center offset is less than 8% and the relative longitudinal velocity dispersion is less than 8%. The feasibility of using radial polarized permanent magnet technology to make permanent magnet for Panitron has been studied. A compact permanent magnet has been designed. Although its magnetic field distribution has shortcomings, its special slowly varying backward magnetic field and working uniform magnetic field can basically meet the requirements of producing large magnetic field respectively. The magnetic field requirement of the cyclotron beam-wave interaction and the realization of the Pennion beam-wave interaction is described. The large cyclotron electron gun is designed with a new design concept under the possible magnetic field distribution obtained by the above permanent magnet. The guide center deviation is 5.4% and the longitudinal velocity is discrete according to the simulation calculation. A large cyclotron electron beam with a transverse velocity of 1.3% and a velocity ratio of 2 is designed to meet the basic requirements of the Panitron operation. The flow pattern of the electron beam under the special magnetic field of the compact permanent magnet is studied in detail, and the monitoring of the working state of the electron gun is proposed. A practical method to optimize the parameters of electron beam is presented.The testing technology and system of W-band permanent magnet packaged panitron are mainly designed for the system design of W-band permanent magnet packaged panitron. Finally, the paper designs the structure frame of the high-order harmonic Panitron with W-band permanent magnet packaging, and builds the thermal test platform of the W-band permanent magnet packaging Panitron system. The whole Panitron thermal test experiment is being actively prepared. In the middle.
【学位授予单位】：电子科技大学
【学位级别】：博士
【学位授予年份】：2015
【分类号】：TN12
，
本文编号：2198989
[Abstract]:Gyrotron is one of the most promising high-power and high-efficiency devices in millimeter wave band. High-power gyrotron has been successfully used in nuclear fusion plasma gyrotron resonance heating. At the same time, gyrotron is used in millimeter wave ceramic sintering, material processing, millimeter wave communication, millimeter wave weapon (active stop system) and high-resolution radar. The shortage of short millimeter wave gyrotron is that it must use superconducting magnet. Because of its high price, complex system and long start-up time, the application effect of gyrotron is limited in many cases. The potential advantages of permanent magnet packaging without superconducting magnets have attracted much attention due to its ability to work in high-order harmonics. At present, Panitrons developed by Japanese scholars have obtained W-band microwave radiation, and American scholars have also made detailed plans and experimental results for developing Ka-band practical panitrons. However, no W-band practical panitrons have been developed yet. In recent years, the strong radiation experiment of the University of Electronic Science and Technology has also carried out the research of the Panitron, carried out the design of the Ka-band third harmonic Panitron and the exploration of the large cyclotron electron gun. This project is supported by the National Natural Science Foundation of China. In this paper, we aim to develop a W-band 10 kW permanent magnet packaged panitron device. We choose the overall scheme of the device, analyze and design the beam-wave interaction system, design the permanent magnet system, design the electronic optical system, design the cold and thermal measurement system and so on. The test method is studied systematically and thoroughly, the high frequency cavity is fabricated and the cold test experiment is carried out, and the results are basically in agreement with the theoretical calculation. In the overall scheme selection of the panitron, the magnetic control panitron with 6th harmonic permanent magnet packaging is proposed, which takes into account both the performance of the permanent magnet material and the efficiency of the device. The mode competition in a 7-Slot resonator is studied in depth to prove the possibility of stable operation of the 6th harmonic 2pi mode. The corresponding resonator is designed and the PIC full electromagnetic particle simulation of the device is carried out. The parameter design of the 6th harmonic Panitron in W-band with power up to 30kW and efficiency up to 40% is given. The large signal calculation program is used to study the influence of the guiding center offset and the velocity dispersion on the performance of the Panitron. The results show that the power of the device can still reach 10 kW and the efficiency is 17%, when the guiding center offset is less than 8% and the relative longitudinal velocity dispersion is less than 8%. The feasibility of using radial polarized permanent magnet technology to make permanent magnet for Panitron has been studied. A compact permanent magnet has been designed. Although its magnetic field distribution has shortcomings, its special slowly varying backward magnetic field and working uniform magnetic field can basically meet the requirements of producing large magnetic field respectively. The magnetic field requirement of the cyclotron beam-wave interaction and the realization of the Pennion beam-wave interaction is described. The large cyclotron electron gun is designed with a new design concept under the possible magnetic field distribution obtained by the above permanent magnet. The guide center deviation is 5.4% and the longitudinal velocity is discrete according to the simulation calculation. A large cyclotron electron beam with a transverse velocity of 1.3% and a velocity ratio of 2 is designed to meet the basic requirements of the Panitron operation. The flow pattern of the electron beam under the special magnetic field of the compact permanent magnet is studied in detail, and the monitoring of the working state of the electron gun is proposed. A practical method to optimize the parameters of electron beam is presented.The testing technology and system of W-band permanent magnet packaged panitron are mainly designed for the system design of W-band permanent magnet packaged panitron. Finally, the paper designs the structure frame of the high-order harmonic Panitron with W-band permanent magnet packaging, and builds the thermal test platform of the W-band permanent magnet packaging Panitron system. The whole Panitron thermal test experiment is being actively prepared. In the middle.
【学位授予单位】：电子科技大学
【学位级别】：博士
【学位授予年份】：2015
【分类号】：TN12
，
本文编号：2198989
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