用TPC的原型用电阻微羊群用于检测器升级的T2K的TPC原型分析测试光束数据

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用TPC的原型用电阻微羊群用于检测器升级的T2K的TPC原型分析测试光束数据

Analysis of test beam data taken with a prototype of TPC with resistive Micromegas for the T2K Near Detector upgrade

论文作者

Attié, D., Ballester, O., Batkiewicz-Kwasniak, M., Billoir, P., Blanchet, A., Blondel, A., Bolognesi, S., Boullon, R., Calvet, D., Casado, M. P., Catanesi, M. G., Cicerchia, M., Cogo, G., Colas, P., Collazuol, G., Dalmazzone, C., Daret, T., Delbart, A., De Lorenzis, A., Dolan, S., Dygnarowicz, K., Dumarchez, J., Emery-Schrenk, S., Ershova, A., Eurin, G., Feltre, M., Forza, C., Giannessi, L., Giganti, C., Gramegna, F., Grassi, M., Guigue, M., Hamacher-Baumann, P., Hassani, S., Henaff, D., Iacob, F., Jesús-Valls, C., Joshi, S., Kurjata, R., Lamoureux, M., Langella, A., Laporte, J. F., Lavitola, L., Lehuraux, M., Longhin, A., Lux, T., Magaletti, L., Marchi, T., Mellet, L., Mezzetto, M., Munteanu, L., Nguyen, Q. V., Orain, Y., Pari, M., Parraud, J. -M., Pastore, C., Pepato, A., Pierre, E., Garcia, C. Pio, Popov, B., Porthault, J., Przybiliski, H., Pupilli, F., Radermacher, T., Radicioni, E., Rossi, F., Roth, S., Russo, S., Rychter, A., Scomparin, L., Smyczek, D., Steinmann, J., Suvorov, S., Swierblewski, J., Terront, D., Thamm, N., Toussenel, F., Valentino, V., Varghese, M., Vasseur, G., Virginet, U., Yevarouskaya, U., Ziembicki, M., Zito, M.

论文摘要

在本文中，我们描述了用于近检测器（ND280）升级的高角度投影室（HA-TPC）原型的性能。 ND280的两个HA-TPC将在每个端板上用八个封装的电阻阳极微羊皮（ERAM）进行仪器，从而构成总计32个ERAM。这种创新的技术允许在几个垫子上通过电离电子发出的电荷检测，从而改善了轨道位置的测定。 TPC原型已配备了针对T2K和HA-TPC读数电子链生产的第一个ERAM模块，并已暴露于DESY测试光束，以测量空间和DE/DX分辨率。在本文中，我们表征了ERAM的性能，并首次将它们与对检测器响应的新开发的模拟进行了比较。对于所有入射角度和所有感兴趣的漂移距离，观察到比800 $ {μ\ rm m} $ {μ\ rm m} $更好的空间分辨率。数据的所有主要功能都是由模拟正确复制的，并且这些性能完全满足了T2K的HA-TPC的要求。

In this paper we describe the performance of a prototype of the High Angle Time Projection Chambers (HA-TPCs) that are being produced for the Near Detector (ND280) upgrade of the T2K experiment. The two HA-TPCs of ND280 will be instrumented with eight Encapsulated Resistive Anode Micromegas (ERAM) on each endplate, thus constituting in total 32 ERAMs. This innovative technique allows the detection of the charge emitted by ionization electrons over several pads, improving the determination of the track position. The TPC prototype has been equipped with the first ERAM module produced for T2K and with the HA-TPC readout electronics chain and it has been exposed to the DESY Test Beam in order to measure spatial and dE/dx resolution. In this paper we characterize the performances of the ERAM and, for the first time, we compare them with a newly developed simulation of the detector response. Spatial resolution better than 800 ${μ\rm m}$ and dE/dx resolution better than 10% are observed for all the incident angles and for all the drift distances of interest. All the main features of the data are correctly reproduced by the simulation and these performances fully fulfill the requirements for the HA-TPCs of T2K.

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