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<p>PAL-XFEL uses 51 klystron modulators as high-voltage pulse-switching devices to accelerate electron beams to 10 GeV. The output stability of the modulator is a key factor in stably accelerating the electron beam. Thyratrons are considered the most suitable device for high-voltage switching for a pulse modulator due to their high voltage, repeatability, and easy impedance matching. We use the E2V thyratron model (CX1836A) as a key component in the modulator system. To stably manage the components of the thyratron, system improvement R&amp;D was conducted to reduce damage of components from the switching noise that affects the RC snubber, control grid G<sub>1</sub>, and grid circuit. This paper describes the improvement results of these three devices.</p>

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Stabilization of beam quality and increase in lifetime of thyratron System for PAL-XFEL

  • 期刊论文

  • 发表日期：

    2026年2月6日

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  • Sang-Hee Kim,
  • Chang-Ki Min,
  • Hoon Heo,
  • Jaeyu Lee

摘要

PAL-XFEL uses 51 klystron modulators as high-voltage pulse-switching devices to accelerate electron beams to 10 GeV. The output stability of the modulator is a key factor in stably accelerating the electron beam. Thyratrons are considered the most suitable device for high-voltage switching for a pulse modulator due to their high voltage, repeatability, and easy impedance matching. We use the E2V thyratron model (CX1836A) as a key component in the modulator system. To stably manage the components of the thyratron, system improvement R&D was conducted to reduce damage of components from the switching noise that affects the RC snubber, control grid G1, and grid circuit. This paper describes the improvement results of these three devices.