Time Projection Chambers for the T2K near detector
Time Projection Chambers for the T2K near detector
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DOI：
10.1088/1742-6596/136/4/042036
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发表时间：
2008-11
期刊：
影响因子：
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通讯作者：
C. Hearty;E. Mazzucato
中科院分区：
文献类型：
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作者：
C. Hearty;E. Mazzucato
T2K 是一项长基线中微子实验，主要目的是通过观察 JPARC 加速器复合体和超级神冈探测器之间的 vμ ⟩ ve 振荡来测量混合角 θ13。一个名为 ND280 的近距离探测器位于距中微子产生目标 280 m 处，将用于测量中微子能谱、味道含量和非振荡光束的相互作用率，从而预测超级神冈探测器的中微子相互作用。 ND280 是一款磁化离轴跟踪探测器，包括三个大型时间投影室 (TPC) 作为关键探测器元件，这将在带电粒子的动量、电荷和身份测量中发挥至关重要的作用。 T2K TPC 目前正在建造中，并将于 2009 年底在 JPARC 进行调试。这些探测器使用基于新型体 MicroMegas 技术的气体微图案装置。 T2K TPC 的设计和构造方面以及预期的探测器性能一起呈现。讨论了最近对大容量 MicroMegas 原型的测试以及基于新 AFTER ASIC 的 TPC 前端电子器件获得的性能。
T2K is a long baseline neutrino experiment aiming primarily at the measurement of the mixing angle θ13 through the observation of vμ ⟩ ve oscillations between the JPARC accelerator complex and the Super Kamiokande detector. A near detector, called ND280 and located 280 m from the neutrino production target, will be used to measure the neutrino energy spectrum, flavour content and interaction rates of the un-oscillated beam and hence to predict the neutrino interactions at Super Kamiokande. ND280 is a magnetized off-axis tracking detector that includes as key detector elements three large Time Projection Chambers (TPCs) that will play a crucial role in the measurement of the momentum, charge and identity of charged particles. The T2K TPCs are now being constructed and will be commissioned at JPARC at the end of 2009. These detectors use gaseous micro-pattern devices which are based on the novel bulk-MicroMegas technology. Design and construction aspects of the T2K TPCs are presented together with the expected detector performances. Recent tests of bulk-MicroMegas prototypes are discussed as well as the performance obtained with the TPC front-end electronics based on the new AFTER ASIC.