Application of movable collimators to the BEPCⅡ |
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引用本文: | 罗涛,金大鹏,邢军,黄楠,董明义,李卫国,李海波,吴英志,张清江,刘冠川.Application of movable collimators to the BEPCⅡ[J].中国物理 C,2010,34(11):1742-1748. |
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作者姓名: | 罗涛 金大鹏 邢军 黄楠 董明义 李卫国 李海波 吴英志 张清江 刘冠川 |
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作者单位: | Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China; Graduate University of Chinese Academy of Sciences, Beijing 100049, China |
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基金项目: | Supported by National Natural Science Foundation of China(10491300); National Science Fund for Distinguished Young Scholars(10225524); Major Programs of Chinese Academy of Sciences(KJ95T-03) |
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摘 要: | BEPCⅡ is a double ring e+ecollider with high beam currents and luminosity,so the high beamrelated backgrounds may disturb the detector.In order to have a good quality of data taking,backgrounds should be kept at a level as low as possible.A series of collimators are designed and installed in both the e+ and erings.Two of the collimators are horizontally movable,each for one ring,about 8 m upstream from the interaction point.Experiments have been done to identify the e-ectiveness of the movable collimators with different apertures and beam currents.The results show that the movable collimators are very effective and can reduce as much as about 50% of beam-related backgrounds.
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关 键 词: | 正负电子对撞机 准直器 应用 数据质量 灯电流 探测器 平动 水 |
收稿时间: | 2009-12-10 |
修稿时间: | 2010-4-30 |
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