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<p>The radio-frequency (RF) cavities in a storage ring are commonly used to compensate for the energy loss of electrons by emitting synchrotron radiation. The RF system has inevitable timing and amplitude jitters owing to a technical limitation of the low-level radio-frequency (LLRF) system. These jitters cause longitudinal oscillations of the electron beam stored in the storage ring, making it difficult to provide the synchrotron radiation reliably. With contemporary technologies, phase and amplitude relative jitters are on the order of <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="40042_2025_1357_Article_IEq1.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="33" /> </InlineMediaObject> <EquationSource Format="TEX">\(10^{-4}\)</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mn>10</mn> <mrow> <mo>-</mo> <mn>4</mn> </mrow> </msup> </math></EquationSource> </InlineEquation>, and this level is generally considered sufficient for reliable operation. We performed a beam physics study of the electron beam motion as a function of amplitude and phase jitter to define the tolerance of the LLRF system for stable operation at the Korea-4GSR storage ring.</p>

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Beam dynamics study for RF tolerance estimation in Korea-4GSR

  • 期刊论文

  • 发表日期：

    2025年4月8日

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  • Eunkyoung Shin,
  • Ji-Gwang Hwang,
  • Bonghyuk Choi,
  • Hyunchang Jin,
  • Seunghwan Shin

摘要

The radio-frequency (RF) cavities in a storage ring are commonly used to compensate for the energy loss of electrons by emitting synchrotron radiation. The RF system has inevitable timing and amplitude jitters owing to a technical limitation of the low-level radio-frequency (LLRF) system. These jitters cause longitudinal oscillations of the electron beam stored in the storage ring, making it difficult to provide the synchrotron radiation reliably. With contemporary technologies, phase and amplitude relative jitters are on the order of \(10^{-4}\) 10 - 4 , and this level is generally considered sufficient for reliable operation. We performed a beam physics study of the electron beam motion as a function of amplitude and phase jitter to define the tolerance of the LLRF system for stable operation at the Korea-4GSR storage ring.