The accumulation of positive ions, produced by ionizing particles crossing Liquid Argon Time Projection Chambers (LAr-TPCs), may generate distortions of the electric drift field affecting the track reconstruction of the ionizing events. These effects could become relevant for large LAr-TPCs operating at surface or at shallow depth, where the detectors are exposed to a copious flux of cosmic rays. A detailed study of such possible field distortions in the ICARUS T600 LAr-TPC has been performed analyzing a sample of cosmic muon tracks recorded with one T600 module operated at surface in 2001. The maximum track distortion turns out to be of few mm in good agreement with the prediction by a numerical calculation. As a cross-check, the same analysis has been performed on a cosmic muon sample recorded during the ICARUS T600 run at the LNGS underground laboratory, where the cosmic ray flux was suppressed by a factor ∼106 by 3400 m water equivalent shielding. No appreciable distortion has been observed, confirming that the effects measured on surface are actually due to ion space charge.

Antonello, M., Baibussinov, B., Bellini, V., Boffelli, F., Bonesini, M., Bubak, A., et al. (2020). Study of space charge in the ICARUS T600 detector. JOURNAL OF INSTRUMENTATION, 15(7) [10.1088/1748-0221/15/07/P07001].

Study of space charge in the ICARUS T600 detector

Bonesini M.;Falcone A.;Spanu M.;Torti M.
;
2020

Abstract

The accumulation of positive ions, produced by ionizing particles crossing Liquid Argon Time Projection Chambers (LAr-TPCs), may generate distortions of the electric drift field affecting the track reconstruction of the ionizing events. These effects could become relevant for large LAr-TPCs operating at surface or at shallow depth, where the detectors are exposed to a copious flux of cosmic rays. A detailed study of such possible field distortions in the ICARUS T600 LAr-TPC has been performed analyzing a sample of cosmic muon tracks recorded with one T600 module operated at surface in 2001. The maximum track distortion turns out to be of few mm in good agreement with the prediction by a numerical calculation. As a cross-check, the same analysis has been performed on a cosmic muon sample recorded during the ICARUS T600 run at the LNGS underground laboratory, where the cosmic ray flux was suppressed by a factor ∼106 by 3400 m water equivalent shielding. No appreciable distortion has been observed, confirming that the effects measured on surface are actually due to ion space charge.
Articolo in rivista - Articolo scientifico
Charge transport and multiplication in liquid media; Neutrino detectors; Noble liquid detectors (scintillationionization double-phase); Time projection Chambers (TPC); Physics - Instrumentation and Detectors; Physics - Instrumentation and Detectors; High Energy Physics - Experiment
English
2-lug-2020
2020
15
7
P07001
open
Antonello, M., Baibussinov, B., Bellini, V., Boffelli, F., Bonesini, M., Bubak, A., et al. (2020). Study of space charge in the ICARUS T600 detector. JOURNAL OF INSTRUMENTATION, 15(7) [10.1088/1748-0221/15/07/P07001].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/287098
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