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arXiv 1209.4845physics.ins-dethep-ex
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LHCb Vertex ™性能和Vertex ™升级

The LHCb Vertex Locator performance and Vertex Locator upgrade

Pablo Rodríguez Pérez

摘要:

LHCb是欧洲核子研究中心大型强子对撞机(LHC)上的一项实验,致力于研究美丽和魅力强子衰变中的新物理。顶点探测器(VELO)是围绕LHCb相互作用点的硅探测器。探测器工作在严重和高度不均匀的辐射环境中。小间距和模拟读数导致最佳单次命中精度为4 $\rm μ$ m。计划于2018年升级的LHCb实验将把整个读出转换为一个以40 MHz事件速率运行的无干扰系统。顶点探测器将不得不应对高达10 $^{16}$ 1 MeV $\rm n_{eq}/cm^2$的辐射水平,比目前实验中预期的高出一个数量级。正在开发一种基于Timepix/Medipix系列芯片的像素检测器解决方案,该芯片具有55 x 55 $\rm μm$像素。此外,微带解决方案也在开发中,具有比当前检测器更细的间距,更高的粒度和更低的质量。VELO的当前状态将与最近的测试结果一起描述。

英文摘要:

LHCb is an experiment dedicated to the study of new physics in the decays of beauty and charm hadrons at the Large Hadron Collider (LHC) at CERN. The Vertex Locator (VELO) is the silicon detector surrounding the LHCb interaction point. The detector operates in a severe and highly non-uniform radiation environment. The small pitch and analogue readout result in a best single hit precision of 4 $\rm μ$m. The upgrade of the LHCb experiment, planned for 2018, will transform the entire readout to a trigger-less system operating at 40 MHz event rate. The vertex detector will have to cope with radiation levels up to 10$^{16}$ 1 MeV$\rm n_{eq}/cm^2$, more than an order of magnitude higher than those expected at the current experiment. A solution is under development with a pixel detector, based on the Timepix/Medipix family of chips with 55 x 55 $\rm μm$ pixels. In addition a micro-strip solution is also under development, with finer pitch, higher granularity and lower mass than the current detector. The current status of the VELO will be described together with recent testbeam results.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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