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Three-dimensional particle-in-cell method of simulating high power terahertz gyrotrons with planar structure 被引量:1
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作者 陈再高 王建国 +3 位作者 王玥 乔海亮 郭伟杰 张殿辉 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第6期597-601,共5页
Based on analyzing the large-signal theory of the planar gyrotron, it is suggested that a simplified structure of the device is used for simulating this kind of device, with the working characteristics of the device k... Based on analyzing the large-signal theory of the planar gyrotron, it is suggested that a simplified structure of the device is used for simulating this kind of device, with the working characteristics of the device kept unchanged, i.e., the same as those of the device with the original structure. Thus, the computational burden can be significantly reduced. Using the proposed method, we simulate a planar gyrotron with its simplified parameters by using the UNIPIC-3D code. Numerical results show that the working frequency, output power, and electron efficiency are respectively about 0.813 THz, 14 kW, and 21%. 展开更多
关键词 planar gyrotron TERAHERTZ particle simulation
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The Analysis of the Phenomenon for ECRH Gyrotrons Test
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作者 RAO Jun KANG Zihua LI Bo ZHOU Jun WANG Mingwei FENG Kun XUAN Weimin YAO Lieying 《Southwestern Institute of Physics Annual Report》 2005年第1期49-51,共3页
in HL-2A tokamak the system of ECRH has been consisted of two gyrotrons that each is 500 kW of the microwave output power, the frequency is 68 ±0.1 GHz and the duration is 1 s. A set of appropriate parameters of ... in HL-2A tokamak the system of ECRH has been consisted of two gyrotrons that each is 500 kW of the microwave output power, the frequency is 68 ±0.1 GHz and the duration is 1 s. A set of appropriate parameters of the power supply and the control procedure are very important during the test of gyrotrons. Basing on analysis of the phenomenon observed, we conside that the troubles came from mainly the stability of the power supply, the sequence of control, the overcurrent protection and the grounding of the system. The solutions have been put forward and the system have been improved partly. The gyrotron has been adjusted one by one. This paper introduces the analysis of power supply for gyrotrons. 展开更多
关键词 ECRH Gyrotron Test
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Design and experimental results of a 28 GHz,400 kW gyrotron for electron cyclotron resonance heating 被引量:1
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作者 孙迪敏 黄麒力 +5 位作者 胡林林 胡鹏 卓婷婷 马国武 陈洪斌 马弘舸 《Plasma Science and Technology》 SCIE EI CAS CSCD 2023年第8期153-158,共6页
A high-power 28 GHz gyrotron has been successfully developed at the Institute of Applied Electronics,China Academy of Engineering Physics.This gyrotron was designed for electron cyclotron resonance heating(ECRH)in the... A high-power 28 GHz gyrotron has been successfully developed at the Institute of Applied Electronics,China Academy of Engineering Physics.This gyrotron was designed for electron cyclotron resonance heating(ECRH)in the spherical tokamak XL-50.A diode magnetron injection gun was designed to produce the required gyrating electron beam.The gyrotron operates in the TE8,3mode in a cylindrical open cavity.An internal quasi-optical mode converter was designed to convert the operating mode into a fundamental Gaussian wave beam and separate the spent electron beam from the outgoing microwave power.A tube has been built and successfully tested.The operational frequency of the tube is 28.1 GHz.For beam parameters at an accelerating voltage of 71 kV and beam current of 16 A,the gyrotron has delivered an output power of 400 kW,with a pulse length of 5 s.The output efficiency is about 50%with a singlestage depressed collector.The gyrotron has been installed on the XL-50 and has played an important role in the ECRH experiments. 展开更多
关键词 ECRH GYROTRON high power long pulse
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Investigation of gyrotron-based collective Thomson scattering for fast ion diagnostics in a compact high-field tokamak
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作者 徐登峰 黄梅 +4 位作者 陈曦璇 张峰 夏冬辉 王之江 潘垣 《Plasma Science and Technology》 SCIE EI CAS CSCD 2023年第6期14-22,共9页
As a promising method for fast ion diagnostics,collective Thomson scattering(CTS)can measure the one-dimensional velocity distribution of fast ions with high spatial and temporal resolution.The feasibility of diagnosi... As a promising method for fast ion diagnostics,collective Thomson scattering(CTS)can measure the one-dimensional velocity distribution of fast ions with high spatial and temporal resolution.The feasibility of diagnosing fast ions in a compact high-field tokamak by CTS was studied in this work,and the results showed that a wide range of probing frequencies could be applied.A high-frequency case and a low-frequency case were mainly considered for fast ion diagnostics in a compact high-field tokamak.The use of a high probing frequency could effectively avoid the refraction effect of the beams,while the application of a low probing frequency allows greater flexibility in the selection of scattering angle which may help to improve the spatial resolution.Based on typical plasma conditions(B_(0)=12.2 T,n_(e0)=4.3×10^(20)m^(-3),T_(e0)=22.2 keV,T_(i0)=19.8 keV)for a compact high-field tokamak,a220 GHz CTS diagnostic that utilizes a small scattering angle ofθ=30°and a 160 GHz CTS diagnostic that utilizes an orthogonal geometry were proposed.Further study showed that the high-frequency case could operate in a wider range of plasma conditions and provide more information on fast ions while the low-frequency case could achieve higher spatial resolution of the poloidal direction. 展开更多
关键词 fast ion collective Thomson scattering GYROTRON
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Design and preliminary test of a 105/140 GHz dual-frequency MW-level gyrotron 被引量:3
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作者 Linlin HU Dimin SUN +11 位作者 Qili HUANG Tingting ZHUO Guowu MA Yi JIANG Shenggang GONG Zaojin ZENG Zixing GUO Chaohai DU Fanhong LI Hongbin CHEN Fanbao MENG Hongge MA 《Plasma Science and Technology》 SCIE EI CAS CSCD 2022年第3期162-169,共8页
A dual-frequency(105/140 GHz)MW-level continuous-wave gyrotron was developed for fusion application at Institute of Applied Electronics,China Academy of Engineering Physics.This gyrotron employs a cylindrical cavity w... A dual-frequency(105/140 GHz)MW-level continuous-wave gyrotron was developed for fusion application at Institute of Applied Electronics,China Academy of Engineering Physics.This gyrotron employs a cylindrical cavity working in the TE18,7 mode at 105 GHz and the TE24,9 mode at 140 GHz.A triode magnetron injection gun and a built-in quasi-optical mode converter were designed to operate at these two frequencies.For the proof-test phase,the gyrotron was equipped with a single-disk boron nitride window to achieve radio frequency output with a power of~500 k W for a short-pulse duration.In the preliminary short-pulse proof-test in the first quarter of2021,the dual-frequency gyrotron achieved output powers of 300 k W at 105 GHz and 540 k W at140 GHz,respectively,under 5 Hz 1 ms continuous pulse-burst operations.Power upgrade and pulse-width extension were hampered by the limitation of the high-voltage power supply and output window.This gyrotron design was preliminarily validated. 展开更多
关键词 GYROTRON MEGAWATT plasma heating fusion application DUAL-FREQUENCY
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Improved method for analyzing quasi-optical launchers 被引量:2
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作者 吴泽威 李浩 +2 位作者 徐建华 李天明 李家胤 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第5期659-664,共6页
An improved method for analyzing the radiation characteristic of the quasi-optical launcher is presented. The launcher is decomposed into an open-ended waveguide and a helical cut according to the proposed method. The... An improved method for analyzing the radiation characteristic of the quasi-optical launcher is presented. The launcher is decomposed into an open-ended waveguide and a helical cut according to the proposed method. The radiation from the open-ended waveguide is obtained by using the Stratton-Chu formulation. The helical cut's radiation is calculated based on its current distribution, gained by several iterative computations, which helps to improve the calculation accuracy since the diffraction effect introduced by the helical cut is considered during the calculation. The proposed method is used to study different launches, and the results are compared with the existing results. Good agreement is achieved between the results obtained from our proposed method and the reported results. The present results provide an alternative for analysis and synthesis of the optical-mode converter. 展开更多
关键词 GYROTRON quasi-optical launcher Stratton-Chu formulation
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Development and Preliminary Commissioning Results of a Long Pulse 140 GHz ECRH System on EAST Tokamak(Invited) 被引量:7
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作者 徐旵东 王晓洁 +26 位作者 刘甫坤 张健 黄懿赟 单家方 吴大俊 胡怀传 李波 李妙辉 杨永 冯建强 徐伟业 汤允迎 韦维 徐立清 刘永 赵海林 J.LOHR Y.A.GORELOV J.P.ANDERSON 马文东 吴则革 王健 张立元 郭斐 孙浩章 闫新胜 EAST Team 《Plasma Science and Technology》 SCIE EI CAS CSCD 2016年第4期442-448,共7页
A long pulse electron cyclotron resonance heating(ECRH)system has been developed to meet the requirements of steady-state operation for the EAST superconducting tokamak,and the first EC wave was successfully injecte... A long pulse electron cyclotron resonance heating(ECRH)system has been developed to meet the requirements of steady-state operation for the EAST superconducting tokamak,and the first EC wave was successfully injected into plasma during the 2015 spring campaign.The system is mainly composed of four 140 GHz gyrotron systems,4 ITER-Like transmission lines,4 independent channel launchers and corresponding power supplies,a water cooling,control &inter-lock system etc.Each gyrotron is expected to deliver a maximum power of 1 MW and be operated at 100-1000 s pulse lengths.The No.1 and No.2 gyrotron systems have been installed.In the initial commissioning,a series of parameters of 1 MW 1 s,900 k W 10 s,800 k W 95 s and650 k W 753 s have been demonstrated successfully on the No.1 gyrotron system based on calorimetric dummy load measurements.Significant plasma heating and MHD instability suppression effects were observed in EAST experiments.In addition,high confinement(H-mode)discharges triggered by ECRH were obtained. 展开更多
关键词 gyrotron system ECRH millimeter wave EAST steady-state operation
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A 0.33-THz second-harmonic frequency-tunable gyrotron 被引量:1
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作者 李铮迪 杜朝海 +2 位作者 戚向波 罗里 刘濮鲲 《Chinese Physics B》 SCIE EI CAS CSCD 2016年第2期585-591,共7页
Dynamics of the axial mode transition process in a 0.33-THz second-harmonic gyrotron is investigated to reveal the physical mechanism of realizing broadband frequency tuning in an open cavity circuit. A new interactio... Dynamics of the axial mode transition process in a 0.33-THz second-harmonic gyrotron is investigated to reveal the physical mechanism of realizing broadband frequency tuning in an open cavity circuit. A new interaction mechanism about propagating waves, featured by wave competition and wave cooperation, is presented and provides a new insight into the beam-wave interaction. The two different features revealed in the two different operation regions of low-order axial modes (LOAMs) and high-order axial modes (HOAMs) respectively determine the characteristic of the overall performance of the device essentially. The device performance is obtained by the simulation based on the time-domain nonlinear theory and shows that using a 12-kV/150-mA electron beam and TE 3,4 mode, the second harmonic gyrotron can generate terahertz radiations with frequency-tuning ranges of about 0.85 GHz and 0.60 GHz via magnetic field and beam voltage tuning, respectively. Additionally, some non-stationary phenomena in the mode startup process are also analyzed. The investiga- tion in this paper presents guidance for future developing high-performance frequency-tunable gyrotrons toward terahertz applications. 展开更多
关键词 GYROTRON mode transition second harmonic frequency tuning TERAHERTZ
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Theoretical and numerical studies on a planar gyrotron with transverse energy extraction 被引量:1
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作者 陈再高 王建国 王玥 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第10期581-586,共6页
In this paper, we study the planar gyrotron theoretically and numerically. Applying the large-signal theory to the planar gyrotron, the wave equation of electric field and the equation of motion of an electron are sim... In this paper, we study the planar gyrotron theoretically and numerically. Applying the large-signal theory to the planar gyrotron, the wave equation of electric field and the equation of motion of an electron are simultaneously solved to obtain some characteristic parameters, such as the phase-space plot of electrons, working frequency, startup time, electronic efficiency, and output power of the device. To verify the formulations used in this paper, three-dimensional particle simula- tions are performed on the same device, and the numerical results accord well with those obtained by using the large-signal theory. Theoretical and numerical results show that the electronic efficiency can reach 21% for the prototype of the planar gyrotron working at the frequency of 0.81 THz. 展开更多
关键词 planar gyrotron TERAHERTZ large-signal theory particle simulation
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Study on dispersion characteristics of terahertz waves in helical waveguides 被引量:1
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作者 Jin-Hai Sun Shao-Hua Zhang +3 位作者 Xu-Tao Zhang He Cai Yong-Qiang Liu Zeng-Ming Chao 《Chinese Physics B》 SCIE EI CAS CSCD 2020年第11期386-390,共5页
Corresponding to the atmospheric transmission windows of the electromagnetic spectrum in the low terahertz range,the mode coupling and dispersion characteristics of two helically corrugated waveguides(HCW)in the frequ... Corresponding to the atmospheric transmission windows of the electromagnetic spectrum in the low terahertz range,the mode coupling and dispersion characteristics of two helically corrugated waveguides(HCW)in the frequency ranges of 90 GHz-100 GHz and 260 GHz-265 GHz are studied.Through analytic calculations and numerical simulations,dispersion curves and structural parameters of the two frequency ranges waveguides are obtained.A novel method was proposed to obtain the dispersion of the HCW from the eigenwave solution using a periodic boundary condition.The HCW in a frequency range of 90 GHz-100 GHz was fabricated and its dispersion performance was measured.By comparing the measured results with the theoretical and the simulated results,the validity of the analytical and simulation method is verified.Limited to our machining capability,the dispersion of the 260 GHz-265 GHz HCW was only simulated and calculated and it was found that the results agree well with each other. 展开更多
关键词 coupling coefficient dispersion curves gyrotron traveling wave tube(gyro-TWT) helical waveguide
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Study and Design of a High-Frequency Interaction Cavity for a 140 GHz Megawatts Gyrotron 被引量:1
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作者 周强 孙旭 +2 位作者 刘建卫 刘甫坤 赵青 《Plasma Science and Technology》 SCIE EI CAS CSCD 2015年第1期84-88,共5页
The gyrotron is one of the most promising high-power millimeter-wave sources for electron cyclotron resonance heating(ECRH) in controlled thermal nuclear fusion experiments.In this paper,the design of a high-frequen... The gyrotron is one of the most promising high-power millimeter-wave sources for electron cyclotron resonance heating(ECRH) in controlled thermal nuclear fusion experiments.In this paper,the design of a high-frequency interaction cavity of a 1 MW/140 GHz gyrotron is described in detail.The cavity is designed by using eigen mode analysis and radio frequency(RF) behavior calculation.Rounded transitions at the input and output tapers are designed for reducing mode conversion.With the obtained cavity structure,non-linear self-consistent equations are adopted to calculate its output power and efficiency.A particle-in-cell(PIC) method is used to simulate the beam-wave interaction process for obtaining the resonant frequency and output power of the cavity.The PIC simulation results match considerably well with the results obtained by the non-linear self-consistent calculation.The cavity is currently under construction and will be integrated with other components for overall testing. 展开更多
关键词 megawatts gyrotron electron cyclotron resonance heating(ECRH) mode competition particle-in-cell
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Rocket Propulsion Powered Using a Gyrotron 被引量:1
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作者 Masafumi Fukunari Kimiya Komurasaki +2 位作者 Yusuke Nakamura Yasuhisa Oda Keishi Sakamoto 《Journal of Energy and Power Engineering》 2017年第6期363-371,共9页
Abstract: This paper presents a review of a beamed energy propulsion rocket, the Microwave Rocket, WlllCn proauces propmslve thrust from millimeter-wave beams transferred from the ground. The thrust is generated thro... Abstract: This paper presents a review of a beamed energy propulsion rocket, the Microwave Rocket, WlllCn proauces propmslve thrust from millimeter-wave beams transferred from the ground. The thrust is generated through millimeter-wave discharge driven in a cylindrical thruster. As a high-power millimeter-wave generator, a Gyrotron is promising as the beam source. The salient benefit of Microwave Rockets is the resultant drastic cost reduction of mass transportation into space. We have already conducted launch experiments and have achieved continuous thrust generation under multi-pulse operation. Recently, a long-distance beam transfer system has been developed. Ignition tests have been conducted. The physics of the millimeter-wave discharge remain unclear. Additional studies using exoerimentation and calculations must be conducted to optimize the thrust generation. 展开更多
关键词 Beamed energy propulsion microwave discharge wireless power transfer gyrotron.
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Denisov-type quasi-optical mode converter forhigher-order asymmetric volume mode gyrotron
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《强激光与粒子束》 EI CAS CSCD 北大核心 2016年第7期89-96,共8页
The principle and design method of Denisov-type quasi-optical mode converter is investigated indetail. The operation process of the Denisov-type launcher is analyzed by applying the geometrical optics, andthe Gaussian... The principle and design method of Denisov-type quasi-optical mode converter is investigated indetail. The operation process of the Denisov-type launcher is analyzed by applying the geometrical optics, andthe Gaussian-like field distribution achieved on the waveguide wall is also derived. The method for designing arippled-wall launcher is proposed on the basis of coupled mode theory. A simulation code for Denisov-type qua-si-optical mode converter GQOMC-D is developed based on coupled mode theory, vector diffraction integrationand physical optics, which is compared to the design parameters and experimental results reported in literaturefor its validity. According to this code, a Denisov-type quasi-optical mode converter used in 110 GHz TE22.6mode gyrotron oscillators is designed. Simulation results indicate that a Gaussian-like beam is obtained at theoutput window with a scalar content of 98.4 % and a conversion efficiency of 94.7 %. 展开更多
关键词 GYROTRON quasi-optical MODE converter Denisov-type LAUNCHER coupled MODE theory
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The 5.8 T Cryogen-Free Gyrotron Superconducting Magnet System on HL-2A
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作者 夏冬辉 黄梅 +4 位作者 周俊 白兴宇 郑铁流 饶军 庄革 《Plasma Science and Technology》 SCIE EI CAS CSCD 2014年第4期410-414,共5页
A 5.8 T cryogen-free superconducting magnet (SCM) system with a warm bore hole of 160 mm in diameter, used for gyrotrons operating in the frequency range from 68 GHz to 140 GHz, is installed on the site of the HL-2A... A 5.8 T cryogen-free superconducting magnet (SCM) system with a warm bore hole of 160 mm in diameter, used for gyrotrons operating in the frequency range from 68 GHz to 140 GHz, is installed on the site of the HL-2A tokamak. The SCM consists of two separate solenoidal magnetic coils connected in series, a 4.2 K Gifford-McMahon (GM) refrigerator, a com- pressor, a coil power supply and two temperature monitors. The performance, test and preliminary experimental results of this SCM system are described in this paper. The magnetic field distribu- tion was measured along the axis, and a dummy tube was used for adjusting the magnet system. Finally, the magnet was used for the operation of a 68 GHz/500 kW gyrotron, which is part of an electron cyclotron resonance heating (ECRH) system. With an additional auxiliary coil and after adjusting tile magnet system, a maximum output power for the ECRH system of up to 400 kW was achieved. 展开更多
关键词 ECRH GYROTRON superconducting magnet cryogen free
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The Introduction to the ECRH System of the HL-2A Tokamak 被引量:1
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作者 RAO Jun KANG Zhihua ZHOU Jun WANG Mingwei LU Zhihong LI Xiujuan 《Southwestern Institute of Physics Annual Report》 2004年第1期58-61,共4页
The 1 MW/68 GHz/1 s ECRH system of HL-2A device is being designed or fabricated. The O mode wave beams are injected into plasma from low field side of the HL-2A tokomak. Because the EC wave can heat plasma locally, it... The 1 MW/68 GHz/1 s ECRH system of HL-2A device is being designed or fabricated. The O mode wave beams are injected into plasma from low field side of the HL-2A tokomak. Because the EC wave can heat plasma locally, it is a very versatile scheme which has been employed to heating, current drive, profile control, confinement improvement. Up to now, the basic physical and engineering parameters of the whole system have been fixed and the subsystems are being designed or fabricated. 展开更多
关键词 ECRH GYROTRON
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PHASE-LOCKING OF HIGH POWER GYROTRON OSCILLATOR
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作者 Tang Changjian (Department of Applied Physics, Chengdu University of Science & Technology of China, Chengdu 610065)Yang Zhonghai Liu Pukun(Institute of High Energy Electronics, University of Electronic Science & Technology of China, Chengdu 610054) 《Journal of Electronics(China)》 1996年第1期89-96,共8页
The phase-locking process is studied for high-power gyrotron oscillator driven by an external signal. The phase-locking nonlinear differential equations are derived, and the condition of phase-locking is shown and ana... The phase-locking process is studied for high-power gyrotron oscillator driven by an external signal. The phase-locking nonlinear differential equations are derived, and the condition of phase-locking is shown and analyzed. The phase-locking signal can be introduced after gyrotron oscillates into saturation or before it. Two different ways of inputting signal make markable influence on the phase-locking process, this phenomenon is discussed. In this paper, the numerical calculations and analysis are given for gyrotron TE13 mode. 展开更多
关键词 Microwave OSCILLATOR GYROTRON SELF-CONSISTENT nonlinear theory PHASE-LOCKING STABILIZED frequency
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STUDY OF CROSSED FIELD GYROTRON OPERATING ON WHISPERING-GALLERY MODE
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作者 罗积润 张世昌 《Journal of Electronics(China)》 1991年第1期1-9,共9页
A linear and nonlinear analysis of crossed-field gyrotron operating on whispering-gallery mode TE<sub>m11</sub> is presented. The detailed discussions are given for the starting oscillationcondition, the e... A linear and nonlinear analysis of crossed-field gyrotron operating on whispering-gallery mode TE<sub>m11</sub> is presented. The detailed discussions are given for the starting oscillationcondition, the effect of the internal conductor in coaxial cavity on the cut-off frequency of modeand the spacing between adjacent modes as well as the effect of the applied voltage on thecyclotron frequency of electron, the starting oscillation beam power and the electron efficiency.It is shown that the efficiency of 41% can be attained for m=2. A comparison of these resultswith those in cylindrical cavity is made. The analyses are helpful for the engineering design. 展开更多
关键词 GYROTRON Whispering-gallery-mode STARTING oscillation condition Beam-wave interaction
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Study of Mode Coupling on Coaxial Resonators
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作者 Rui Liu Hong-Fu Li 《Journal of Electronic Science and Technology》 CAS 2011年第3期221-226,共6页
A study of mode coupling phenomenon of coaxial resonators has been conducted with theories. Through establishing the source-free transmission line equation, boundary conditions of the coaxial resonators with a corruga... A study of mode coupling phenomenon of coaxial resonators has been conducted with theories. Through establishing the source-free transmission line equation, boundary conditions of the coaxial resonators with a corrugated inner conductor are analyzed. In the end, calculations are performed in a wide range of corrugation parameters for the resonator of the Karlsruhe Institute of Technology (KIT) relevant coaxial gyrotron. 展开更多
关键词 Index Terms--Coaxial resonators GYROTRON mode coupling simple surface impedance model.
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Development of the Highly Homogeneous Magnetic Field for Simulative Gyrotron by HTS
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作者 HOU Binglin ZHU Xuewu LIN Jianlong SU Bin 《Southwestern Institute of Physics Annual Report》 2004年第1期152-154,共3页
The low temperature superconducting magnet system, with the highly homogeneous magnetic field, has been applied extensively, and has had important effects on many domains. With the development of the cryogenic and sup... The low temperature superconducting magnet system, with the highly homogeneous magnetic field, has been applied extensively, and has had important effects on many domains. With the development of the cryogenic and superconducting techniques, it is possible that high temperature superconducting magnet with highly homogeneous magnetic field is manufactured by high temperature superconductor(HTS). Therefore, a simulative gyrotron applied into war, with highly homogeneous magnetic field, is designed and manufactured by high temperature superconducting material. 展开更多
关键词 HTS Highly homogeneous magnetic field GYROTRON
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Design of Anode HVPS of ECRH on HL-2A Tokamak
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作者 KANG Zihua WANG Mingwei FENG Kun LI Xiujuan RAO Jun LI Bo ZHENG Tieliu WANG Xuehua 《Southwestern Institute of Physics Annual Report》 2005年第1期58-59,共2页
The ECRH is an effective way of plasma heating on tokamak. The gyrotrons with two high voltage power supplies ( HVPS ) are used in ECRH experiment on the HL-2A tokamak. This type of gyrotron is benefit to improve th... The ECRH is an effective way of plasma heating on tokamak. The gyrotrons with two high voltage power supplies ( HVPS ) are used in ECRH experiment on the HL-2A tokamak. This type of gyrotron is benefit to improve the output efficiency and HVPS design. So the anode HVPS with higher output power, reliable characteristic and controlling easily are necessary for the work of gyrotron normally. 展开更多
关键词 HVPS Gyrotron
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