摘要
介绍了多种测量加速器与探测器亮度的方法,并着重描述了利用了e+e-→e+e-末态事例测量亮度的算法。尤其是针对加速器与探测器联合调试初期的具体情况,充分利用量能器的端盖信息进行事例筛选,结合在线算法计算得到亮度值,同时利用在线亮度实现对加速器运行状态和谱仪工作状态的监测。检测结果表明,在线亮度测量系统可以起到对运行状态和数据获取质量与稳定性的监测作用。
As a crucial parameter of both accelerator and detector, the realization of online luminosity measurement is of great importance. Several methods of luminosity measurement are recapitulated and the emphasis is laid on the algorithm of using e^＋ e^- and γγ final states. Taking into account the status at the beginning of the joint commissioning of detector and accelerator, the information from endcap electromagnetic calorimeter is used to select the good event. With the help of online Eventfilter, the luminosity is calculated and the monitoring of online cross section of hadron is realized. The preliminary results indicate that the online luminosity measurement is stable and its role for machine tuning and monitoring of the overall running status is indispensable.
出处
《核电子学与探测技术》
CAS
CSCD
北大核心
2010年第6期730-738,747,共10页
Nuclear Electronics & Detection Technology
基金
国家自然科学基金(10491303
10775412
10825524)
国家重点基础研究发展计划(973项目)(2009CB825200
2009CB825206)
中国科学院重大科研装备研制项目(H729330S7)
中国科学院知识创新工程重要方向项目(KJCX-YW-N29)资助
关键词
Bhabha事例
亮度
截面
在线监测
Bhabha Event, Lunimosity, Cross section, Online monitoriring
