CERN Accelerating science

Article
Report number	arXiv:2303.04481
Title	Characterization of Charge Spreading and Gain of Encapsulated Resistive Micromegas Detectors for the Upgrade of the T2K Near Detector Time Projection Chambers
Author(s)	Ambrosi, L. (Padua U., Astron. Dept. ; INFN, Padua) ; Attié, D. (IRFU, Saclay) ; Ballester, O. (Barcelona, IFAE) ; Batkiewicz-Kwasniak, M. (Cracow, INP) ; Billoir, P. (Paris U., VI-VII) ; Blanchet, A. (Paris U., VI-VII) ; Blondel, A. (Paris U., VI-VII) ; Bolognesi, S. (IRFU, Saclay) ; Boullon, R. (IRFU, Saclay) ; Calvet, D. (IRFU, Saclay) ; Casado, M.P. (Barcelona, IFAE ; Barcelona, Autonoma U.) ; Catanesi, M.G. (Bari U. ; INFN, Bari) ; Cicerchia, M. (INFN, Legnaro) ; Cogo, G. (Padua U., Astron. Dept. ; INFN, Padua) ; Colas, P. (IRFU, Saclay) ; Collazuol, G. (Padua U., Astron. Dept. ; INFN, Padua) ; D'Ago, D. (Padua U., Astron. Dept. ; INFN, Padua) ; Dalmazzone, C. (Paris U., VI-VII) ; Daret, T. (IRFU, Saclay) ; Delbart, A. (IRFU, Saclay) ; De Lorenzis, A. (Barcelona, IFAE ; Unlisted, ES) ; de Oliveira, R. (CERN) ; Dolan, S. (CERN) ; Dygnarowicz, K. (Warsaw U. of Tech. (main)) ; Dumarchez, J. (Paris U., VI-VII) ; Emery-Schrenk, S. (IRFU, Saclay) ; Ershova, A. (IRFU, Saclay) ; Eurin, G. (IRFU, Saclay) ; Feltre, M. (Padua U., Astron. Dept. ; INFN, Padua) ; Forza, C. (Padua U., Astron. Dept. ; INFN, Padua) ; Giannessi, L. (Padua U., Astron. Dept. ; INFN, Padua) ; Giganti, C. (Paris U., VI-VII) ; Gramegna, F. (INFN, Legnaro) ; Grassi, M. (Padua U., Astron. Dept. ; INFN, Padua) ; Guigue, M. (Paris U., VI-VII) ; Hamacher-Baumann, P. (Aachen, Tech. Hochsch.) ; Hassani, S. (IRFU, Saclay) ; Henaff, D. (IRFU, Saclay) ; Iacob, F. (Padua U., Astron. Dept. ; INFN, Padua) ; Jesús-Valls, C. (Barcelona, IFAE) ; Joshi, S. (IRFU, Saclay) ; Kurjata, R. (Warsaw U. of Tech. (main)) ; Lamoureux, M. (Padua U., Astron. Dept. ; INFN, Padua) ; Langella, A. (Naples U.) ; Laporte, J.F. (IRFU, Saclay) ; Lachner, K. (Warwick U.) ; Lavitola, L. (Naples U.) ; Lehuraux, M. (IRFU, Saclay) ; Levorato, S. (Padua U., Astron. Dept. ; INFN, Padua ; INFN, Trieste) ; Longhin, A. (Padua U., Astron. Dept. ; INFN, Padua) ; Lux, T. (Barcelona, IFAE) ; Magaletti, L. (Bari U. ; INFN, Bari) ; Marchi, T. (INFN, Legnaro) ; Mattiazzi, M. (Padua U., Astron. Dept. ; INFN, Padua) ; Mehl, B. (CERN) ; Mellet, L. (Paris U., VI-VII) ; Mezzetto, M. (Padua U., Astron. Dept. ; INFN, Padua) ; Munteanu, L. (CERN) ; Obrębski, W. (Warsaw U. of Tech. (main)) ; Orain, Y. (Paris U., VI-VII) ; Pari, M. (Padua U., Astron. Dept. ; INFN, Padua) ; Parraud, J.-M. (Paris U., VI-VII) ; Pastore, C. (Bari U. ; INFN, Bari) ; Pepato, A. (Padua U., Astron. Dept. ; INFN, Padua) ; Pierre, E. (Paris U., VI-VII) ; Garcia, C. Pio (Barcelona, IFAE) ; Pizzirusso, O. (CERN) ; Popov, B. (Paris U., VI-VII) ; Porthault, J. (IRFU, Saclay) ; Przybiliski, H. (Cracow, INP) ; Pupilli, F. (Padua U., Astron. Dept. ; INFN, Padua) ; Radermacher, T. (Aachen, Tech. Hochsch.) ; Radicioni, E. (Bari U. ; INFN, Bari) ; Riccio, C. (IRFU, Saclay) ; Rinaldi, L. (INFN, Trieste) ; Rossi, F. (IRFU, Saclay) ; Roth, S. (Aachen, Tech. Hochsch.) ; Russo, L. (Paris U., VI-VII) ; Russo, S. (Paris U., VI-VII) ; Rychter, A. (Warsaw U. of Tech. (main)) ; Saenz-Arevalo, W. (Paris U., VI-VII) ; Schune, Ph. (IRFU, Saclay) ; Scomparin, L. (Padua U., Astron. Dept. ; INFN, Padua) ; Smyczek, D. (Aachen, Tech. Hochsch.) ; Steinmann, J. (Aachen, Tech. Hochsch.) ; Suvorov, S. (Paris U., VI-VII) ; Swierblewski, J. (Cracow, INP) ; Teixeira, A. (CERN) ; Terront, D. (Paris U., VI-VII) ; Thamm, N. (Aachen, Tech. Hochsch.) ; Toussenel, F. (Paris U., VI-VII) ; Valentino, V. (Bari U. ; INFN, Bari) ; Varghese, M. (Barcelona, IFAE) ; Vasseur, G. (IRFU, Saclay) ; Villa, E. (CERN) ; Virginet, U. (Paris U., VI-VII) ; Vuillemin, C. (IRFU, Saclay) ; Yevarouskaya, U. (Paris U., VI-VII) ; Ziembicki, M. (Warsaw U. of Tech. (main)) ; Zito, M. (Paris U., VI-VII)
Publication	2023-08-06
Imprint	2023-03-08
Number of pages	40
In:	Nucl. Instrum. Methods Phys. Res., A 1056 (2023) 168534
DOI	10.1016/j.nima.2023.168534
Subject category	hep-ex ; Particle Physics - Experiment ; physics.ins-det ; Detectors and Experimental Techniques
Accelerator/Facility, Experiment	T2K
Abstract	An upgrade of the near detector of the T2K long baseline neutrino oscillation experiment is currently being conducted. This upgrade will include two new Time Projection Chambers, each equipped with 16 charge readout resistive Micromegas modules. A procedure to validate the performance of the detectors at different stages of production has been developed and implemented to ensure a proper and reliable operation of the detectors once installed. A dedicated X-ray test bench is used to characterize the detectors by scanning each pad individually and to precisely measure the uniformity of the gain and the deposited energy resolution over the pad plane. An energy resolution of about 10% is obtained. A detailed physical model has been developed to describe the charge dispersion phenomena in the resistive Micromegas anode. The detailed physical description includes initial ionization, electron drift, diffusion effects and the readout electronics effects. The model provides an excellent characterization of the charge spreading of the experimental measurements and allowed the simultaneous extraction of gain and RC information of the modules.
Copyright/License	publication: © 2023-2024 Elsevier B.V. preprint: (License: CC BY 4.0)

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