BES-III束流能量测量系统的改进

Jianyong Zhang, Xiao Cai, Xiaohu Mochizuki, Muchnoi Nickolai, A. Mikhail, E. Abakumova, H. Fred
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引用次数: 0

摘要

束流能量测量系统对BES-III探测器和BEPC-II加速器都具有重要的实用价值。利用康普顿后向散射原理实现了高能散射光子的探测。采用了许多先进的技术和精密的仪器来获得高精度的正电子/电子束能量测量。在5年的运行过程中,为了满足数据采集的需要,提高系统本身的测量能力,对系统进行了升级改造,包括对激光和光学分系统的部件进行改造,将激光器的视口更换为真空插入分系统,对高纯锗探测器采用电冷却系统,对数据采集和处理分系统进行了改进。系统的升级保证了BEPC-II的光束能量的顺利有效测量,并为BES-III的进一步物理分析提供了准确的离线能量值。
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Improvement of Beam Energy Measurement System for BES-III
The beam energy measurement system is significant and profit for both BES-III detector and BEPC-II accelerator. The detection of the high energy scattering photons is realized by virtue of the Compton backscattering principle. Many advanced techniques and precise instruments are employed to acquire the highly accurate measurement of positron/electron beam energy. During five years’ running period, in order to satisfy the requirement of data taking and enhance the capacity of measurement itself, the upgradation of system is continued, which involves the components reformation of laser and optics subsystem, replacement of view-port of the laser to vacuum insertion subsystem, the usage of electric cooling system for high purity germanium detector, and the refinement of data acquisition and processing subsystem. The upgrading of system guarantees the smooth and effective measuring of beam energy at BEPC-II and accommodates the accurate offline energy values for further physics analysis at BES-III.
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