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Article | |
Report number | arXiv:2304.03881 |
Title | Correction of the baseline fluctuations in the GEM-based ALICE TPC |
Author(s) |
Alme, J. (Bergen U.) ; Alt, T. (Frankfurt U., Inst. Kernphys.) ; Andrei, C. (Bucharest, IFIN-HH) ; Anguelov, V. (Heidelberg U.) ; Appelshäuser, H. (Frankfurt U., Inst. Kernphys.) ; Arslandok, M. (CERN ; Yale U.) ; Barnaföldi, G.G. (Wigner RCP, Budapest) ; Bartsch, E. (Frankfurt U., Inst. Kernphys.) ; Becht, P. (Heidelberg U. ; Darmstadt, EMMI) ; Bellwied, R. (Houston U.) ; Berdnikova, A. (Moscow Phys. Eng. Inst. ; Heidelberg U.) ; Bialas, N. (Frankfurt U., Inst. Kernphys.) ; Bialas, P. (Frankfurt U., Inst. Kernphys.) ; Biswas, S. (CAPSS, Kolkata) ; Blidaru, B. (Heidelberg U. ; Darmstadt, EMMI) ; Boldizsár, L. (Wigner RCP, Budapest) ; Bratrud, L. (Frankfurt U., Inst. Kernphys.) ; Braun-Munzinger, P. (Darmstadt, EMMI) ; Bregant, M. (Sao Paulo U.) ; Britton, C.L. (Oak Ridge) ; Brucker, S. (Heidelberg U.) ; Brücken, E.J. (Helsinki Inst. of Phys.) ; Büsching, H. (Frankfurt U., Inst. Kernphys.) ; Camacho, R. Soto (Puebla U., Mexico) ; Castro, A.J. (Tennessee U.) ; Chatzidaki, P. (Heidelberg U.) ; Christiansen, P. (Lund U.) ; Clonts, L.G. (Oak Ridge) ; Cormier, T.M. (Oak Ridge) ; Dhankher, P. (Indian Inst. Tech., Mumbai) ; Dittrich, S. (Frankfurt U., Inst. Kernphys.) ; Ehlers, R. (Yale U.) ; Ericson, M.N. (Oak Ridge) ; Ezell, N.B. (Oak Ridge) ; Fabbietti, L. (Munich, Tech. U.) ; Flor, F. (Houston U.) ; Gaardhøje, J.J. (Bohr Inst.) ; Munhoz, M.G. (Sao Paulo U.) ; Garabatos, C. (Darmstadt, EMMI) ; Gasik, P. (Munich, Tech. U. ; Darmstadt, EMMI) ; Geiger, T. (Frankfurt U., Inst. Kernphys.) ; Gera, Á. (Wigner RCP, Budapest) ; Glässel, P. (Heidelberg U.) ; Goh, D.J.Q. (Nagasaki Inst. Appl. Sci.) ; Grein, A. (Frankfurt U., Inst. Kernphys.) ; Gundem, T. (Frankfurt U., Inst. Kernphys.) ; Gunji, T. (Tokyo U.) ; Habib, M. (Darmstadt, EMMI) ; Hamagaki, H. (Nagasaki Inst. Appl. Sci.) ; Hamar, G. (Wigner RCP, Budapest) ; Hansen, J.C. (Bohr Inst.) ; Harris, J.W. (Yale U.) ; Hauer, P. (Bonn U., HISKP) ; Hayashi, S. (Tokyo U.) ; Hehner, J. (Darmstadt, EMMI) ; Heino, J.K. (Helsinki Inst. of Phys.) ; Hellbär, E. (Frankfurt U., Inst. Kernphys.) ; Helstrup, H. (HVL, Norway) ; Hemmer, M. (Frankfurt U., Inst. Kernphys.) ; Herghelegiu, A. (Bucharest, IFIN-HH) ; Hernandez, R.A. (Sao Paulo U.) ; Herrera, H.D. Hernandez (Sao Paulo U.) ; Hilden, T.E. (Helsinki Inst. of Phys.) ; Hughes, C. (Tennessee U.) ; Hummel, S. (Heidelberg U.) ; Ivanov, M. (Darmstadt, EMMI) ; Jäger, J. (Frankfurt U., Inst. Kernphys.) ; Jung, J. (Frankfurt U., Inst. Kernphys.) ; Jung, M. (Frankfurt U., Inst. Kernphys.) ; Kangasaho, E. (Helsinki Inst. of Phys.) ; Ketzer, B. (Bonn U., HISKP) ; Kirsch, S. (Frankfurt U., Inst. Kernphys.) ; Kleiner, M. (Frankfurt U., Inst. Kernphys.) ; Klemenz, T. (Munich, Tech. U.) ; Knospe, A.G. (Houston U.) ; Kowalski, M. (Cracow, INP) ; Kreis, L. (Darmstadt, EMMI) ; Krüger, M. (Frankfurt U., Inst. Kernphys.) ; Kupfer, N. (Heidelberg U.) ; Lang, R. (Munich, Tech. U.) ; Lautner, L. (Munich, Tech. U.) ; Lesch, M. (Munich, Tech. U.) ; Lesenechal, Y. (CERN) ; Liebske, F. (Frankfurt U., Inst. Kernphys.) ; Lippmann, C. (Darmstadt, EMMI) ; Majka, R.D. (Yale U.) ; Markert, C. (Texas U.) ; Martins, T.A. (Sao Paulo U.) ; Masciocchi, S. (Darmstadt, EMMI) ; Matonoha, O. (Lund U.) ; Matyja, A. (Cracow, INP) ; Meres, M. (Comenius U. ; Masaryk U., Brno) ; Mihaylov, D.L. (Munich, Tech. U.) ; Miśkowiec, D. (Darmstadt, EMMI) ; Mittelstaedt, T. (Heidelberg U.) ; Mordasini, C. (Munich, Tech. U.) ; Morhardt, T. (Darmstadt, EMMI) ; Muley, S. (Heidelberg U.) ; Mulligan, J. (Yale U.) ; Munzer, R.H. (Frankfurt U., Inst. Kernphys.) ; Murakami, H. (Tokyo U.) ; Münning, K. (Bonn U., HISKP) ; Nassirpour, A. (Lund U.) ; Nattrass, C. (Tennessee U.) ; Nielsen, B.S. (Bohr Inst.) ; Noije, W.A.V. (Sao Paulo U.) ; Ogino, M. (Nagasaki Inst. Appl. Sci.) ; Oliveira, A.C. ; Silva, Da ; Oskarsson, A. (Lund U.) ; Oyama, K. (Nagasaki Inst. Appl. Sci.) ; Önnerstad, A. (Lund U.) ; Österman, L. (Lund U.) ; Pachmayer, Y. (Heidelberg U.) ; Paić, G. (Mexico U., ICN) ; Patra, R.N. (Calcutta, VECC) ; Peskov, V. (Frankfurt U., Inst. Kernphys.) ; Petris, M. (Bucharest, IFIN-HH) ; Petrovici, M. (Bucharest, IFIN-HH) ; Planinic, M. (Zagreb U., Phys. Dept.) ; Prodan, L. (Bucharest, IFIN-HH) ; Radu, A. (Bucharest, IFIN-HH) ; Rasson, J. (Oak Ridge) ; Read, K.F. (Oak Ridge) ; Rehman, A. (Bergen U.) ; Renfordt, R. (Frankfurt U., Inst. Kernphys.) ; Røed, K. (Oslo U.) ; Röhrich, D. (Bergen U.) ; Rubio, E. (Heidelberg U.) ; Rusu, A. (Oak Ridge) ; Sanches, B.C.S. (Sao Paulo U.) ; Schambach, J. (Texas U.) ; Scheid, S. (Frankfurt U., Inst. Kernphys.) ; Schmidt, C. (Darmstadt, EMMI) ; Schmier, A. (Tennessee U.) ; Schweda, K. (Darmstadt, EMMI) ; Sekihata, D. (Tokyo U.) ; Siebig, S. (Heidelberg U.) ; Silva, R.W.D. (Sao Paulo U.) ; Silvermyr, D. (Lund U.) ; Sitar, B. (Comenius U. ; Masaryk U., Brno) ; Smirnov, N. (Yale U.) ; Soltveit, H.K. (Heidelberg U.) ; Sorensen, S.P. (Tennessee U.) ; Stachel, J. (Heidelberg U.) ; Šerkšnyte, L. (Munich, Tech. U.) ; Tambave, G. (Bergen U.) ; Ullaland, K. (Bergen U.) ; Ulukutlu, B. (Munich, Tech. U.) ; Varga, D. (Wigner RCP, Budapest) ; Rueda, O. Vazquez (Lund U.) ; Velure, A. (Bergen U.) ; Vergara Limón, S. (Puebla U., Mexico) ; Vorbach, O. (Heidelberg U.) ; Voss, B. (Darmstadt, EMMI) ; Weidlich, C. (Frankfurt U., Inst. Kernphys.) ; Wiechula, J. (Frankfurt U., Inst. Kernphys.) ; Windelband, B. (Heidelberg U.) ; Winkler, S. (Munich, Tech. U.) |
Publication | 2023-11-24 |
Imprint | 2023-04-07 |
Number of pages | 30 |
In: | JINST 18 (2023) P11021 |
DOI | 10.1088/1748-0221/18/11/P11021 |
Subject category | hep-ex ; Particle Physics - Experiment |
Accelerator/Facility, Experiment | CERN LHC ; ALICE |
Abstract | To operate the ALICE Time Projection Chamber in continuous mode during the Run 3 and Run 4 data-taking periods of the Large Hadron Collider, the multi-wire proportional chamber-based readout was replaced with gas-electron multipliers. As expected, the detector performance is affected by the so-called common-mode effect, which leads to significant baseline fluctuations. A detailed study of the pulse shape with the new readout has revealed that it is also affected by ion tails. Since reconstruction and data compression are performed fully online, these effects must be corrected at the hardware level in the FPGA-based common readout units. The characteristics of the common-mode effect and of the ion tail, as well as the algorithms developed for their online correction, are described in this paper. The common-mode dependencies are studied using machine-learning techniques. Toy Monte Carlo simulations are performed to illustrate the importance of online corrections and to investigate the performance of the developed algorithms. |
Copyright/License | preprint: (License: arXiv nonexclusive-distrib 1.0) publication: © 2023-2024 The Authors (License: CC-BY-4.0) |