Suppression of Initial Energy Spreads in Electron Radio Frequency Linacs for Intense Irradiation Applications

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概要

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• RF linacs for high-power beams are operated under the fully beam-loaded condition for power efficiency. Under this condition, initial energy spreads are generated by the transient beam-loading effect. Irradiation sources require a beam energy of less than 10 MeV for radiation safety. In order to maximize the beam power and maintain the beam energy at a safe level, we need to suppress the initial energy spreads. In an L-band traveling-wave linac for irradiation applications, the initial high-energy electrons are suppressed by beam current modulation with RF power modulation. In this study, the temporal profile of beam energy is calculated by a numerical method and verified by measurement. As a result, the average beam energy and the corresponding beam power are improved by nearly 60% compared with the case without any modulations. The effect of beam current modulation on bunching and acceleration is also discussed in this paper.

• Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
• 2011-11-25

著者

• Park Sung-ju

  Pohang Accelerator Laboratory Postech

• Chung Kie-Hyung

  Korea Accelerator and Plasma Research Association, Cheorwon, Gangwon 269-843, Korea

• Son Yoon-Gyu

  Pohang University of Science and Technology, Pohang, Gyeongbuk 790-784, Korea

• Kim Sang-Hoon

  Pohang University of Science and Technology, Pohang, Gyeongbuk 790-784, Korea

• Yang Hae-Ryong

  Pohang University of Science and Technology, Pohang, Gyeongbuk 790-784, Korea

• Oh Jong-Seok

  National Fusion Research Institute, Daejeon 305-333, Korea

• Ha Gwanghui

  Pohang University of Science and Technology, Pohang, Gyeongbuk 790-784, Korea

• Jang Sung-Duck

  Pohang University of Science and Technology, Pohang, Gyeongbuk 790-784, Korea

• Lee Kangok

  Korea Accelerator and Plasma Research Association, Cheorwon, Gangwon 269-843, Korea

• Cho Moo-Hyun

  Pohang University of Science and Technology, Pohang, Gyeongbuk 790-784, Korea

• Namkung Won

  Pohang University of Science and Technology, Pohang, Gyeongbuk 790-784, Korea

• Park Sung-Ju

  Pohang University of Science and Technology, Pohang, Gyeongbuk 790-784, Korea

関連論文

• High Power Beam Test and Measurement of Emittance Evolution of a 1.6-Cell Photocathode RF Gun at Pohang Accelerator Laboratory
• Reduction of Multipole Fields in Photocathode RF Gun
• Suppression of Initial Energy Spreads in Electron Radio Frequency Linacs for Intense Irradiation Applications

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