Upgrade of the T2K Near Detector Time Projection Chamber Data Concentrator Cards

本提案旨在支持东海至神冈（T2K）探测器时间投影室（TPCs）附近数据集中卡（DCCs）的升级。T2K实验是一项旨在寻找介子中微子束中电子中微子的自发量子力学外观的实验。高强度的介子中微子束是在日本质子加速研究中心（J-PARC）产生的，并由距离生产（ND280） 280米的近距离探测器和距离神冈矿295公里的远距离探测器Super-Kamiokande测量。如果电子中微子在远端探测器上的出现被观察到，它就可以允许测量中微子中的电荷宇称（CP）不对称性。CP不对称意味着物质中微子和反物质中微子的振荡方式不同，这有助于解释为什么在宇宙中观测到的反物质如此之少。近距离探测器的设计目的是提供中微子相互作用的详细信息，因为它们在细粒度探测器（fgd）中相互作用，并在tpc中进行跟踪。tpc提供了极好的轨道动量测量，并且可以区分介子和电子轨道。随着T2K波束强度的不断增加，需要对TPC dcs进行升级，以提高TPC的可靠性和性能。

This proposal is to support the upgrade of the Data Concentrator Cards (DCCs) for the Tokai to Kamioka (T2K) near detector Time Projection Chambers (TPCs). The T2K experiment is an experiment built to look for the spontaneous quantum mechanical appearance of electron neutrinos in a beam of muon neutrinos. The high intensity muon neutrino beam is produced at the Japan Proton Acceleration Research Complex (J-PARC), and is measured by a near detector at 280m from the production (ND280), and by a far detector, Super-Kamiokande, 295km away in the Kamioka mine. If the appearance of electron neutrinos at the far detector is observed, it could allow for the measurement of a Charge-Parity (CP) asymmetry in neutrinos. A CP asymmetry would mean that the matter and anti-matter neutrino oscillate differently, and could help explain why there is so little anti-matter observed in the universe. The near detectors are designed to provide detailed information about the neutrino interactions, as they interact in the fine grained detectors (FGDs), and are tracked in the TPCs. The TPCs provide excellent momentum measurements of the tracks, and can discriminate between muon and electron tracks. An upgrade to the TPC DCCs is needed to improve the TPC reliability and performance as the intensity of the T2K beam continues to increase.