在LEDA装置上进行的束晕实验
The Beam Halo Experiment at the LEDA Facility
摘要：
由于在强质子束中产生晕粒子的潜在不利影响，因此必须清楚地了解当前和拟议的高强度直线加速器可能导致晕形成的机制。为此，已经开发了一个理论模型，该模型表明，在强空间电荷力和线性传输通道中的周期性聚焦的联合影响下，质子可以被踢到晕轨道中。然而，还没有实验测量质子束中的束晕。在本文中，我们报告的进展，努力进行一项实验，以测量束晕使用现有的高强度质子束的LEDA设施。一个线性传输通道已组装与适当的诊断用于测量作为光束参数的函数的束晕中的预期的小光束分量。该实验是基于使用一个阵列的高动态范围线和光束刮刀，以确定沿运输通道的晕和核心配置文件。将介绍实验设计的详细信息和预期的晕圈测量特性。
英文摘要：
Due to the potentially adverse effects of the generation of halo particles in intense proton beams, it is imperative to have a clear understanding of the mechanisms that can lead to halo formation for current and proposed high- intensity linacs. To this end a theoretical model has been developed, which indicates that protons under the combined influence of strong space charge forces and periodic focussing in a linear transport channel can be kicked into halo orbits. However, no experimental measurements of beam halo in proton beams have yet been carried out. In this paper we report the progress of an effort to carry out an experiment to measure beam-halo using the existing high- intensity proton beam of the LEDA facility. A linear transport channel has been assembled with the appropriate diagnostics for measuring the expected small beam component in the beam halo as a function of beam parameters. The experiment is based on the use of an array of high-dynamic-range wire and beam scrapers to determine the halo and core profiles along the transport channel. Details of the experimental design, the expected halo measurement properties will be presented.
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