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根据动态核极化核磁共振(DNP-NMR)发展需要,对应用于400 MHz DNP-NMR的263 GHz回旋振荡管高频系统进行研究,通过非线性理论计算程序对其进行分析,给出了工作模式为TE03的高频系统的设计参数。并通过粒子模拟(PIC)软件进行注波互作用计算,结果表明,在工作电压10 kV,注电流0.2 A,电子注速度比为2.0时,设计的高频系统输出功率为460.2 W,效率达到23.1%,约1 GHz的调频率范围,可满足263 GHz整管参数设计要求,从而为DNP-NMR用回旋振荡管的研制打下技术基础。
According to the development of DNP-NMR, a 263 GHz gyrotron oscillating tube high-frequency system applied to 400 MHz DNP-NMR was studied and analyzed by non-linear theoretical calculation program, and the work was given The model is the design parameter of the high-frequency system of TE03. The simulation results show that the output power of the high frequency system is 460.2 W when the operating voltage is 10 kV, the injection current is 0.2 A, and the electron injection speed ratio is 2.0. The efficiency reaches 23.1%, about 1 GHz frequency modulation range to meet the design requirements of 263 GHz pipe parameters, so as to DNP-NMR cycloidal oscillator with the development and lay the technical foundation.