Space charge induced resonance excitation in high intensity rings
Space charge induced resonance excitation in high intensity rings
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DOI：
10.1103/physrevstab.6.034205
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发表时间：
2003-03
影响因子：
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通讯作者：
S. Cousineau;S. Lee;J. Holmes;V. Danilov;A. Fedotov
中科院分区：
文献类型：
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作者：
S. Cousineau;S. Lee;J. Holmes;V. Danilov;A. Fedotov
我们提出了一个粒子核心模型研究空间电荷对高强度同步加速器光束的影响，特别强调了洛斯阿拉莫斯国家实验室的质子存储环（PSR）。我们的粒子核心模型公式包括现实的晶格聚焦和色散。我们在实际晶格结构中传输匹配和不匹配的光束，并将结果与等效均匀聚焦近似的结果进行比较。特别针对晶格结构和有限动量扩散对共振行为的影响。构建了错配包络的频闪图，并显示了高阶共振和在高错配或高强度下占主导地位的随机效应。我们观察了高强度PSR光束积累过程中包络相空间结构的演化。最后，我们研究了包络-粒子参数共振条件，并讨论了由于这一机制在同步加速器光束中产生晕的可能性。
We present a particle core model study of the space charge effect on high intensity synchrotron beams, with specific emphasis on the Proton Storage Ring (PSR) at Los Alamos National Laboratory. Our particle core model formulation includes realistic lattice focusing and dispersion. We transport both matched and mismatched beams through real lattice structure and compare the results with those of an equivalent uniform-focusing approximation. The effects of lattice structure and finite momentum spread on the resonance behavior are specifically targeted. Stroboscopic maps of the mismatched envelope are constructed and show high-order resonances and stochastic effects that dominate at high mismatch or high intensity. We observe the evolution of the envelope phase-space structure during a high intensity PSR beam accumulation. Finally, we examine the envelope-particle parametric resonance condition and discuss the possibility for halo growth in synchrotron beams due to this mechanism.