Application of movable collimators to the BEPC

Application of movable collimators to the BEPC

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 th...

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Veröffentlicht in:Chinese physics C 2010, Vol.34 (11), p.1742-1748
1. Verfasser: 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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准直器
探测器
数据质量
正负电子对撞机
灯电流
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container_end_page 1748
container_issue 11
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container_title Chinese physics C
container_volume 34
creator 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
description 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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subjects 准直器
探测器
数据质量
正负电子对撞机
灯电流
title Application of movable collimators to the BEPC
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