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首页> 外文期刊>Physical Review. Accelerators and Beams >Comparison of coaxial higher order mode couplers for the CERN Superconducting Proton Linac study
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Comparison of coaxial higher order mode couplers for the CERN Superconducting Proton Linac study

机译：用于CERN超导质子直线加速器研究的同轴高阶模态耦合器的比较

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摘要

Higher order modes (HOMs) may affect beam stability and refrigeration requirements of superconducting proton linacs such as the Superconducting Proton Linac, which is studied at CERN. Under certain conditions beam-induced HOMs can accumulate sufficient energy to destabilize the beam or quench the superconducting cavities. In order to limit these effects, CERN considers the use of coaxial HOM couplers on the cutoff tubes of the 5-cell superconducting cavities. These couplers consist of resonant antennas shaped as loops or probes, which are designed to couple to potentially dangerous modes while sufficiently rejecting the fundamental mode. In this paper, the design process is presented and a comparison is made between various designs for the high-beta SPL cavities, which operate at 704.4 MHz. The rf and thermal behavior as well as mechanical aspects are discussed. In order to verify the designs, a rapid prototype for the favored coupler was fabricated and characterized on a low-power test-stand.
机译：高阶模（HOM）可能会影响超导质子直线加速器（例如CERN所研究的超导质子直线加速器）的束稳定性和制冷要求。在某些条件下，束流诱导的HOM可以积累足够的能量，以使束流不稳定或淬灭超导腔。为了限制这些影响，CERN考虑在5单元超导腔的截止管上使用同轴HOM耦合器。这些耦合器由形状为环或探头的谐振天线组成，这些天线被设计为耦合到潜在危险模式，同时充分抑制基本模式。本文介绍了设计过程，并对在704.4 MHz下工作的高βSPL腔的各种设计进行了比较。讨论了射频和热行为以及机械方面。为了验证设计，制造了适用于快速耦合器的快速原型，并在低功耗试验台上进行了表征。

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