“神龙一号”电子束时间分辨能谱测量新方案
New layout of time resolved beam energy spectrum measurement for Dragon-Ⅰ
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摘要: 介绍了“神龙一号”直线感应加速器电子束时间分辨能谱测量新方案——用螺线管磁场旋转束流法测量其出口电子束能谱,阐述了旋转束流法基本原理及测量方案设计，并且讨论了测量误差。此方案所测能谱为时间分辨离散型束流能谱，其误差与所测离散束流能谱相关。通过测量“神龙一号”加速器末端的电子束流在螺线管磁场中的旋转角度及角度展宽，从而得到脉冲电子束流能谱。Abstract: A new layout of time resolved beam energy spectrum measurement is proposed for Dragon-Ⅰ by a new method named RBS(rotating beams in solenoids). The basic theory of RBS and the new layout are presented and the measuring error is also discussed. The derived time resolved beam energy spectrum is discrete and is determined by measuring the beam’s rotating angle and expanding width through a group of solenoids at the export of Dragon-Ⅰ.
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