| 太赫兹二次谐波回旋振荡管 |
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| 引用本文： | 史少辉,纪登辉,封顺珍,韩万强.太赫兹二次谐波回旋振荡管[J].微波学报,2019,35(5):40-44. |
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| 作者姓名： | 史少辉 纪登辉 封顺珍 韩万强 |
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| 作者单位： | 石家庄学院物理学院,石家庄 050035 |
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| 基金项目： | 河北省高等学校科学技术研究项目(Z2017053);石家庄学院博士科研启动基金(14BS005);石家庄学院教学改革研究项目(JGXM-201623A); 河北省科技计划项目(19K57635D) |
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| 摘 要： | 针对应用于动态核极化核磁共振成像的太赫兹回旋振荡器管展开研究,采用相对论电子回旋脉塞非线性理论分析0.46 THz 回旋振荡管互作用系统的动力学行为,研究系统模式竞争问题。优化器件系统参数以获得较高的注-波能量转化效率。利用粒子模拟(PIC)方法验证非线性动力学研究结果,模拟结果显示当工作电压为12 kV、工作电流为0.24 A 时,输出功率和效率分别为173 W 和6%。若采用降压收集极后,则整管效率可进一步提高至14.4%。
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| 关 键 词： | 太赫兹 回旋振荡管 核磁共振成像 粒子模拟 |
A Terahertz Second Harmonic Gyrotron Oscillator |
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| SHI Shao-hui,JI Deng-hui,FENG Shun-zhen,HAN Wan-qiang.A Terahertz Second Harmonic Gyrotron Oscillator[J].Journal of Microwaves,2019,35(5):40-44. |
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| Authors: | SHI Shao-hui JI Deng-hui FENG Shun-zhen HAN Wan-qiang |
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| Affiliation: | Department of Physics,Shijiazhuang University,Shijiazhuang 050035, China |
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| Abstract: | Gyrotron oscillators for the application of dynamic nuclear polarization enhanced nuclear magnetic resonance (DNP-NMR) are studied. The nonlinear theory of realistic electron cyclotron maser (ECM) is used to analyze the dynamitic behavior of a 0.46THz gyrotron oscillator, and the mode competition problem is also studied. The system parameters of the device are optimized to obtain higher beam-wave interaction efficiency. The particle in cell( PIC ) simulation is used to verify the results of nonlinear dynamics theory. Simulation results show that the output power and efficiency are 137 W and 6% respectively with the beam voltage of 12 kV and beam current of 0.24 A. The efficiency can be increased to 14.4% by utilizing a single stage depressed collector (SDC). |
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| Keywords: | terahertz gyrotron oscillator nuclear magnetic resonance imaging particle in cell simulation |
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