A transverse phase-space measurement technique for high-brightness, H - beams
A transverse phase-space measurement technique for high-brightness, H - beams
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高亮度H梁横向相空间测量技术
DOI：
10.1016/0168-9002(92)90189-b
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发表时间：
1992
影响因子：
1.4
通讯作者：
V. Yuan
中科院分区：
文献类型：
--
作者：
R. Connolly;K. Johnson;D. Sandoval;V. Yuan
测量带电粒子束横向相空间分布的一种常见方法是用狭缝、针孔板或线栅截取束流，然后用平行通道收集器或荧光屏测量漂移后的束流分布。许多下一代加速器应用(例如，在重离子聚变和核废料的变形中)将利用相空间分布较小的高束电流。波束的功率密度将太大，不能拦截整个波束。本文描述了一种适用于H-−光束的测量技术：用扫描磁铁上游的激光进行光中和，使一小部分光束与全束分离。相空间测量只在中和光束上进行。
A common method of measuring transverse phase-space distributions in charged-particle beams is to intercept the beam with slits, pinhole plates, or wire grids, and to measure the beam distribution after a drift with a parallel-channel collector or a fluorescent screen. Many of the next generation of accelerator applications (e.g., in heavy-ion fusion and transmutation of nuclear waste) will utilize high-beam currents with small phase-space distributions. The power densities of beams will be too large to permit the interception of entire beams. This paper describes a measurement technique that is applicable to H−beams: a small portion of the beam is separated from the full beam by means of photoneutralization with a laser that is upstream from a sweep magnet. Phase-space measurements are made on only the neutralized beam.