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<p>This work presents the design, development, and measurement results of the Allison scanner installed in the low energy beam transport (LEBT) section of the 100 MeV proton accelerator at KOMAC. The Allison scanner is a widely used diagnostic device that enables precise measurement of transverse emittance by electrostatically sweeping the beam with position scan. In this study, we describe the Allison scanner development process, highlight the issues encountered during fabrication and integration, and discuss their underlying causes along with the solutions that were implemented. Furthermore, we present the measurement results obtained with the scanner and evaluate its performance in characterizing the beam quality. In addition, the stability of the ion source, monitored with the Allison scanner during the first half of the 2025 user service period, is analyzed and discussed.</p>

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Allison scanner development and measurements in the LEBT of the KOMAC 100 MeV proton accelerator

  • 期刊论文

  • 发表日期：

    2026年4月30日

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  • Seokho Moon,
  • Dong-Hwan Kim,
  • Seunghyun Lee,
  • Sang-Pil Yun,
  • Sung-Yun Cho,
  • Han-Sung Kim,
  • Hyeok-Jung Kwon

摘要

This work presents the design, development, and measurement results of the Allison scanner installed in the low energy beam transport (LEBT) section of the 100 MeV proton accelerator at KOMAC. The Allison scanner is a widely used diagnostic device that enables precise measurement of transverse emittance by electrostatically sweeping the beam with position scan. In this study, we describe the Allison scanner development process, highlight the issues encountered during fabrication and integration, and discuss their underlying causes along with the solutions that were implemented. Furthermore, we present the measurement results obtained with the scanner and evaluate its performance in characterizing the beam quality. In addition, the stability of the ion source, monitored with the Allison scanner during the first half of the 2025 user service period, is analyzed and discussed.