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首页> 外文期刊>Physical Review. Accelerators and Beams >Measurement and analysis of the impact of transverse incoherent wakefields in a light source storage ring
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Measurement and analysis of the impact of transverse incoherent wakefields in a light source storage ring

机译：测量和分析光源存储环中横向非相干尾波场的影响

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摘要

The influence of incoherent wakefields arising from a high current beam circulating in a ring composed of many flat chambers on the beam is analyzed numerically and experimentally for the SOLEIL storage ring. Three distinct ranges of the excited field are studied: the long multiturn regime in multibunch fillings, the medium regime involving neighboring bunches, and the short intrabunch regime. Two theoretical models, which both take into account the field diffusion across chamber walls of finite thickness, are employed to compare the measurement with theoretical expectations. Specific experimental methods, based respectively upon orbit analysis, bunch-by-bunch transverse feedback and a single particle betatron resonance, are introduced to measure the incoherent focusing effect in the three regimes. It is found that the excited incoherent fields can be large enough to affect the ring performance. The non-negligible contribution of nonevaporable getter coating is shown to improve the agreement between measurements and calculations.
机译：对于SOLEIL存储环，通过数值和实验分析了由在许多平坦腔室组成的环中循环的高电流束引起的非相干尾流场对束的影响。研究了三个不同范围的激发场：多束充填中的长多圈机制，涉及相邻束的中等域和短束内机制。两种理论模型都考虑了跨有限厚度腔室壁的场扩散，将测量结果与理论预期值进行了比较。分别基于轨道分析，逐束横向反馈和单粒子倍速电子共振的具体实验方法被引入，以测量这三种情况下的非相干聚焦效应。发现激发的非相干场可以足够大以影响振铃性能。不可蒸发的吸气剂涂层的贡献不可忽略，可以改善测量和计算之间的一致性。

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