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RF power commissioning and an electron beam diagnostic station for a new RF-gun at Chiang Mai University

机译:RF功率调试和清迈大学新RF-GUN的电子束诊断站

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This paper presents results of the RF power commissioning for a new thermionic RF electron gun of the linear accelerator system at the Plasma and Beam Physics Research Facility, Chiang Mai University. The research focuses on generation and measurements of a radio-frequency wave for using as a power source for electron acceleration. The low-level RF power measurements were conducted to study the performance of the system. Then, the commissioning of the RF-gun with the high-level RF power obtained from a new 7-MW klystron tube was performed to study the proper condition for the RF-gun operation. The gun temperature was optimized and the proper temperature was about 33°C-34°C. In nominal operation, the RF system produces the RF pulses with the repetition rate of 10 Hz for the proper RF pulse length of 3-4 us and the maximum peak power of ~3.9 MW. The absorbed RF peak power is 2.7 MW, which leads to the average power of 81 W. In order to investigate the influence of the asymmetric electromagnetic field distribution inside the RF-gun, an integrated electron beam diagnostic station has been developed and is installed in the accelerator beam transport line. The results of the RF commissioning and development of the diagnostic system for measurements of the electron pulse current, the transverse beam emittance and the beam energy are reported and discussed.
机译:本文介绍了清迈大学等离子和梁物理研究设施的线性加速器系统的新型热离子射频电子枪的RF功率调试的结果。该研究侧重于使用作为电子加速度的电源的射频波的产生和测量。进行低级RF功率测量以研究系统的性能。然后,进行RF-GU枪的高级RF功率从新的7MW klystron管获得的高级RF功率,以研究RF枪操作的适当条件。优化枪温度,适当的温度约为33℃-34℃。在标称操作中,RF系统产生RF脉冲,重复率为10 Hz,适当的RF脉冲长度为3-4 US和〜3.9 mW的最大峰值功率。吸收的RF峰值功率为2.7兆瓦,导致81W的平均功率。为了研究RF-GU枪内部的不对称电磁场分布的影响,已经开发了一种集成的电子束诊断站并安装在加速度梁运输线。报告并讨论了用于测量电子脉冲电流的诊断系统的RF调试和开发的结果,并讨论了横向光束发射率和光束能量。

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