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<p>Beam commissioning of the RAON linac has been carried out with various ion species in the injector and with <sup>40</sup>Ar<sup>9+</sup> and <sup>40</sup>Ar<sup>8+</sup> beams in the low-energy superconducting linac SCL3. This paper primarily reports the results obtained with <sup>40</sup>Ar<sup>8+</sup> beams, while data from other ion species are included when needed. A beam-tuning procedure for the LEBT based on Allison scanner data was established, enabling proper beam matching at the RFQ entrance. In the MEBT, transverse beam parameters were refined through wire-scanner measurements. During SCL3 beam commissioning, cavity settings obtained from phase scans yielded beam energies consistent with TRACK predictions and were confirmed by TOF measurements. The SCL3 transmission was lower than expected, indicating that further study is required to clarify and mitigate the beam-loss mechanisms, including possible limitations in the longitudinal acceptance.</p>

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Beam commissioning of the RAON injector and low-energy superconducting linac SCL3

  • 期刊论文

  • 发表日期：

    2026年5月11日

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  • Ji-Ho Jang,
  • Dong-O Jeon,
  • Hyung Jin Kim,
  • Jeongil Heo,
  • Bum Sik Park,
  • Jang Won Kwon,
  • Yujung Ahn,
  • Chul Jin Choi,
  • Eunhun Im,
  • Sangyoon Bae,
  • Kyung Tae Seol,
  • Ki Taek Son,
  • Do Yoon Lee,
  • In Seok Hong,
  • Yoochul Jung,
  • Youngkwon Kim,
  • Hyojae Jang,
  • Heetae Kim,
  • Juwan Kim,
  • Joonsun Kang,
  • Hyung Joo Son,
  • Chang Seok Seo,
  • Yeon Sei Chung,
  • Hyunchang Jin,
  • Sukho Moon

摘要

Beam commissioning of the RAON linac has been carried out with various ion species in the injector and with 40Ar9+ and 40Ar8+ beams in the low-energy superconducting linac SCL3. This paper primarily reports the results obtained with 40Ar8+ beams, while data from other ion species are included when needed. A beam-tuning procedure for the LEBT based on Allison scanner data was established, enabling proper beam matching at the RFQ entrance. In the MEBT, transverse beam parameters were refined through wire-scanner measurements. During SCL3 beam commissioning, cavity settings obtained from phase scans yielded beam energies consistent with TRACK predictions and were confirmed by TOF measurements. The SCL3 transmission was lower than expected, indicating that further study is required to clarify and mitigate the beam-loss mechanisms, including possible limitations in the longitudinal acceptance.