LHCb顶点定位器升级

P. Tsopelas
{"title":"LHCb顶点定位器升级","authors":"P. Tsopelas","doi":"10.1109/NSSMIC.2014.7431238","DOIUrl":null,"url":null,"abstract":"The upgrade of the LHCb experiment, planned for 2018, will transform the experiment to a trigger-less system reading out the full detector at 40 MHz event rate with all data reduction algorithms executed in high level software on a computing farm. The Vertex Locator (VELO) detector which surrounds the interaction region is used to reconstruct primary and secondary vertices and measure the flight distance of long-lived particles. The upgraded VELO will be a hybrid pixel detector read out by the VeloPix ASIC with on-chip zero-suppression. The hottest region will have peak pixel hit rates of 900 Mhits/s yielding a total data rate more than 3 Tbit/s for the upgraded VELO. The data will be read out on high-speed electrical and optical serial links. The detector modules are located in a secondary vacuum, separated from the beam vacuum by a thin custom made foil. The detector halves are retracted during injection of the LHCb beams and closed when the beams are declared stable. In the closed position the innermost sensitive pixels are at 5.1 mm from the beams. The material budget will be minimised by the use of evaporative CO2 coolant circulating in micro channels within 400 μm thick silicon substrates. Microchannel cooling brings many advantages: very efficient heat transfer with almost no temperature gradients across the module, no CTE mismatch with silicon components, and low material contribution. The current status of the VELO upgrade will be described together with a presentation of recent test results.","PeriodicalId":144711,"journal":{"name":"2014 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":"{\"title\":\"The LHCb Vertex Locator upgrade\",\"authors\":\"P. Tsopelas\",\"doi\":\"10.1109/NSSMIC.2014.7431238\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The upgrade of the LHCb experiment, planned for 2018, will transform the experiment to a trigger-less system reading out the full detector at 40 MHz event rate with all data reduction algorithms executed in high level software on a computing farm. The Vertex Locator (VELO) detector which surrounds the interaction region is used to reconstruct primary and secondary vertices and measure the flight distance of long-lived particles. The upgraded VELO will be a hybrid pixel detector read out by the VeloPix ASIC with on-chip zero-suppression. The hottest region will have peak pixel hit rates of 900 Mhits/s yielding a total data rate more than 3 Tbit/s for the upgraded VELO. The data will be read out on high-speed electrical and optical serial links. The detector modules are located in a secondary vacuum, separated from the beam vacuum by a thin custom made foil. The detector halves are retracted during injection of the LHCb beams and closed when the beams are declared stable. In the closed position the innermost sensitive pixels are at 5.1 mm from the beams. The material budget will be minimised by the use of evaporative CO2 coolant circulating in micro channels within 400 μm thick silicon substrates. Microchannel cooling brings many advantages: very efficient heat transfer with almost no temperature gradients across the module, no CTE mismatch with silicon components, and low material contribution. The current status of the VELO upgrade will be described together with a presentation of recent test results.\",\"PeriodicalId\":144711,\"journal\":{\"name\":\"2014 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)\",\"volume\":\"35 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2014-11-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"2\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2014 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/NSSMIC.2014.7431238\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2014 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/NSSMIC.2014.7431238","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 2

摘要

LHCb实验的升级计划于2018年进行,将把实验转变为一个无触发系统,以40 MHz的事件速率读取整个探测器,所有数据缩减算法在计算场的高级软件中执行。围绕相互作用区域的顶点定位器(VELO)探测器用于重建主、次顶点和测量长寿命粒子的飞行距离。升级后的VELO将是一个混合像素检测器,由片上零抑制的VeloPix ASIC读出。最热门的区域将具有900 Mhits/s的峰值像素命中率,使升级后的VELO的总数据速率超过3 Tbit/s。数据将在高速电气和光串行链路上读出。探测器模块位于二次真空中,通过定制的薄箔与光束真空分开。在注入LHCb束流时,探测器的一半被收回,当束流被宣布稳定时,探测器的一半被关闭。在封闭位置,最内层的敏感像素距光束5.1毫米。通过在400 μm厚的硅衬底内的微通道中循环使用蒸发CO2冷却剂,将材料预算降至最低。微通道冷却带来了许多优点:非常有效的传热,几乎没有整个模块的温度梯度,CTE与硅组件不匹配,材料贡献低。将描述VELO升级的当前状态,并介绍最近的测试结果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The LHCb Vertex Locator upgrade
The upgrade of the LHCb experiment, planned for 2018, will transform the experiment to a trigger-less system reading out the full detector at 40 MHz event rate with all data reduction algorithms executed in high level software on a computing farm. The Vertex Locator (VELO) detector which surrounds the interaction region is used to reconstruct primary and secondary vertices and measure the flight distance of long-lived particles. The upgraded VELO will be a hybrid pixel detector read out by the VeloPix ASIC with on-chip zero-suppression. The hottest region will have peak pixel hit rates of 900 Mhits/s yielding a total data rate more than 3 Tbit/s for the upgraded VELO. The data will be read out on high-speed electrical and optical serial links. The detector modules are located in a secondary vacuum, separated from the beam vacuum by a thin custom made foil. The detector halves are retracted during injection of the LHCb beams and closed when the beams are declared stable. In the closed position the innermost sensitive pixels are at 5.1 mm from the beams. The material budget will be minimised by the use of evaporative CO2 coolant circulating in micro channels within 400 μm thick silicon substrates. Microchannel cooling brings many advantages: very efficient heat transfer with almost no temperature gradients across the module, no CTE mismatch with silicon components, and low material contribution. The current status of the VELO upgrade will be described together with a presentation of recent test results.
求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
自引率
0.00%
发文量
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信