The BaBar muon system upgrade

IEEE Nuclear Science Symposium Conference Record, 2005 Pub Date : 2006-09-05 DOI:10.1109/NSSMIC.2005.1596597

W. Menges

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引用次数: 12

Abstract

Resistive plate chambers (RPCs) were used for the instrumentation of the iron flux return of the BaBar detector as a muon system. Unfortunately the efficiency of the original RPCs degraded rapidly with time. Limited streamer tubes (LSTs) were chosen for an upgrade of the barrel portion of the detector. The phased installation started in summer 2004 with replacing two sextants of the BaBar barrel muon system with LSTs. The modules for the remaining four sextants are under long-term test at SLAC and ready for installation, expected in 2006. The modules become inaccessible once installed in BaBar, so it is critical to select only perfectly working tubes. To accomplish this a strong QC system was established during the prototype phase, and fully implemented throughout pre-production and construction. To spot any damage during transport, the final modules are subjected to comprehensive tests at SLAC immediately after arrival and kept under long-term test till installation into BaBar. Details of these tests and results from long-term testing will be discussed. Since spring 2005 the PEP-II accelerator is running and BaBar is collecting data. First experience from data taking with the LSTs will be presented and the performance of the detector discussed

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BaBar介子系统升级

电阻板室(RPCs)作为一个介子系统，用于BaBar探测器铁通量返回的仪器测量。不幸的是，原始rpc的效率随着时间的推移而迅速下降。选择了有限的拖缆管(LSTs)来升级探测器的桶部分。2004年夏天开始分阶段安装，用lst替换了BaBar桶形介子系统的两个六分仪。其余四个六分仪的模块正在SLAC进行长期测试，并准备在2006年安装。一旦安装到BaBar中，模块就变得不可访问，因此选择完美工作的管是至关重要的。为了实现这一目标，在原型阶段建立了一个强大的质量控制系统，并在整个预生产和建设过程中全面实施。为了发现运输过程中的任何损坏，最终模块在到达后立即在SLAC进行全面测试，并保持长期测试，直到安装到BaBar。将讨论这些试验的细节和长期试验的结果。自2005年春季以来，PEP-II加速器开始运行，BaBar开始收集数据。本文将介绍使用lst采集数据的初步经验，并讨论探测器的性能

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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IEEE Nuclear Science Symposium Conference Record, 2005

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