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arXiv 1012.0865physics.ins-dethep-exnucl-ex
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用于T2K近探测器的时间投影室

Time Projection Chambers for the T2K Near Detectors

T2K ND280 TPC collaboration

摘要:

T2 K实验旨在研究中微子振荡特性,方法是将日本东海J-PARC产生的高强度中微子束射向位于295公里外日本神冈的大型Super-Kamiokande探测器。该实验包括一个精密的近探测器复合体,位于中微子产生靶下游280米处,以测量中微子束的性质,并更好地了解能量低于几个GeV的中微子相互作用。近距离探测器的一个关键元件是ND 280跟踪器,它由两个有源闪烁棒靶系统组成,周围环绕着三个大型时间投影室(TPC),用于带电粒子跟踪。用跟踪器收集的数据被用来研究带电电流中微子相互作用率和运动学振荡前,以减少振荡测量的不确定性的远探测器。跟踪器被前UA 1/Nomad偶极磁体包围,TPC测量通过它们的带电粒子的电荷、动量和粒子类型。TPC设计的新功能包括由复合板构成的矩形盒布局,使用散装micromegas气体放大检测器,基于新ASIC的电子读出,以及光电子校准系统。本文介绍了TPC的设计和建设,micromegas模块,读出电子,气体处理系统,并显示的TPC的性能推导出与粒子束,宇宙射线,和校准系统的测量。

英文摘要:

The T2K experiment is designed to study neutrino oscillation properties by directing a high intensity neutrino beam produced at J-PARC in Tokai, Japan, towards the large Super-Kamiokande detector located 295 km away, in Kamioka, Japan. The experiment includes a sophisticated near detector complex, 280 m downstream of the neutrino production target in order to measure the properties of the neutrino beam and to better understand neutrino interactions at the energy scale below a few GeV. A key element of the near detectors is the ND280 tracker, consisting of two active scintillator-bar target systems surrounded by three large time projection chambers (TPCs) for charged particle tracking. The data collected with the tracker is used to study charged current neutrino interaction rates and kinematics prior to oscillation, in order to reduce uncertainties in the oscillation measurements by the far detector. The tracker is surrounded by the former UA1/Nomad dipole magnet and the TPCs measure the charges, momenta, and particle types of charged particles passing through them. Novel features of the TPC design include its rectangular box layout constructed from composite panels, the use of bulk micromegas detectors for gas amplification, electronics readout based on a new ASIC, and a photoelectron calibration system. This paper describes the design and construction of the TPCs, the micromegas modules, the readout electronics, the gas handling system, and shows the performance of the TPCs as deduced from measurements with particle beams, cosmic rays, and the calibration system.

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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