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<p>Automatic phase-setting is essential for modern linacs which have increasingly stringent time demands for beam tune-up and fault compensation. A key challenge in automatic phase-setting is obtaining an accurate knowledge of the position and phase offsets of all cavities. This study proposes a beam-based method that employs time-of-flight experiments for simultaneous alignment and phase calibration of a superconducting hadron linac. The proposed method is verified using the CAFE2 accelerator at the Institute of Modern Physics, where offset measurements enable rapid tune-up via automatic phase-setting, and the output beam energies closely match the predicted values. The proposed method is able to address longitudinal position shifts within cryomodules due to cool-down, readily applicable to superconducting hadron linacs, and expected to be employed in the upcoming commissioning of CiADS and HIAF.</p>

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Automatic phase-setting via time-of-flight alignment and phase calibration on a superconducting hadron linac

  • 期刊论文

  • 发表日期：

    2025年5月13日

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  • Chi Feng,
  • Jonathan C. Wong,
  • Zhi-Jun Wang,
  • Zhong-Yi Li,
  • Wang-Sheng Wang,
  • Wei-Long Chen,
  • Yuan He

摘要

Automatic phase-setting is essential for modern linacs which have increasingly stringent time demands for beam tune-up and fault compensation. A key challenge in automatic phase-setting is obtaining an accurate knowledge of the position and phase offsets of all cavities. This study proposes a beam-based method that employs time-of-flight experiments for simultaneous alignment and phase calibration of a superconducting hadron linac. The proposed method is verified using the CAFE2 accelerator at the Institute of Modern Physics, where offset measurements enable rapid tune-up via automatic phase-setting, and the output beam energies closely match the predicted values. The proposed method is able to address longitudinal position shifts within cryomodules due to cool-down, readily applicable to superconducting hadron linacs, and expected to be employed in the upcoming commissioning of CiADS and HIAF.