The High Voltage distribution system of the ATLAS Tile Calorimeter and its performance during data taking

Journal Article · Mon Aug 06 00:00:00 EDT 2018 · Journal of Instrumentation

DOI:https://doi.org/10.1088/1748-0221/13/08/p08006· OSTI ID:1468949

Calvet, D. ^[1]; Calvet, S. ^[1]; Chadelas, R. ^[1]; Cinca, D. ^[2]; Grenier, Ph. ^[3]; Gris, Ph. ^[1]; Lafarguette, P. ^[1]; Lambert, D. ^[1]; Marjanović, M. ^[1]; Seabra, L. F. Oleiro ^[4]; Martins, F. M. Pedro ^[4]; Campos, J. B. Pena Madeira Gouveia De ^[5]; Saez, S. M. Romano ^[1]; Rosnet, Ph. ^[1]; Santoni, C. ^[1]; Valéry, L. ^[6]; Vazeille, F. ^[1]

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1. Univ. Clermont Auvergne, Aubiere (France)
2. Univ. Clermont Auvergne, Aubiere (France); Technische Univ. Dortmund, Dortmund (Germany)
3. Univ. Clermont Auvergne, Aubiere (France); SLAC National Accelerator Lab., Menlo Park, CA (United States)
4. Lab. de Instrumentacao e Fisica Experimental de Particulas, Lisboa (Portugal)
5. Lab. de Instrumentacao e Fisica Experimental de Particulas, Lisboa (Portugal); Univ. de Lisboa, Lisboa (Portugal)
6. Univ. Clermont Auvergne, Aubiere (France); Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)

This study documents the characteristics of the high voltage (HV) system of the hadronic calorimeter TileCal of the ATLAS experiment. Such a system is suitable to supply reliable power distribution into particles physics detectors using a large number of PhotoMultiplier Tubes (PMTs). Measurements performed during the 2015 and 2016 data taking periods of the ATLAS detector show that its performance, in terms of stability and noise, fits the specifications. In particular, almost all the PMTs show a voltage instability smaller than 0.5 V corresponding to a gain stability better than 0.5%. A small amount of channels was found not working correctly. To diagnose the origin of such defects, the results of the HV measurements were compared to those obtained using a Laser system. The analysis shows that less than 0.2% of the about 10 thousand HV channels were malfunctioning.

• Research Organization: SLAC National Accelerator Lab., Menlo Park, CA (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: AC02-76SF00515
• OSTI ID: 1468949
• Journal Information: Journal of Instrumentation, Vol. 13, Issue 8; ISSN 1748-0221
• Publisher: Institute of Physics (IOP)
• Country of Publication: United States
• Language: English

Related Subjects

47 OTHER INSTRUMENTATION
Large detector systems for particle and astroparticle physics
Calorimeters
Performance of High Energy Physics Detectors
Voltage distributions