Space charge in ionization detectors and the NA48 electromagnetic calorimeter

The subject of space charge due to positive ions slowly moving in parallel plate ionization chambers is considered. A model for the degradation of the detector response is developed, with particular emphasis on electromagnetic calorimeters. The topics discussed include: (a) the stationary and (b) th...

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Detalles Bibliográficos
Autores principales: Palestini, S, Barr, Giles David, Ceccucci, Augusto, Cogan, J, Cundy, Donald C, Fischer, G, Funk, W, Gianoli, A, Gonidec, A, Govi, G, Kubischta, Werner, Luitz, S, Norton, Alan Robert, Schinzel, D, Velasco, M, Vossnack, O, Wahl, H, Kekelidze, V D, Tatishvili, G T, Tkachev, A L, Formica, A, Frabetti, P L, Martini, M, Chollet, J C, Crépé, S, Fayard, Louis, Iconomidou-Fayard, L, Ocariz, J, Unal, G, Calafiura, P, Cerri, C, Cirilli, M, Costantini, F, Fantechi, R, Giudici, Sergio, Gorini, B, Mannelli, I, Sozzi, M, Biino, C, Mikulec, I
Lenguaje:eng
Publicado: 1998
Materias:
Detectors and Experimental Techniques
Acceso en línea:https://dx.doi.org/10.1016/S0168-9002(98)01193-0
http://cds.cern.ch/record/369960
Descripción
Sumario:The subject of space charge due to positive ions slowly moving in parallel plate ionization chambers is considered. A model for the degradation of the detector response is developed, with particular emphasis on electromagnetic calorimeters. The topics discussed include: (a) the stationary and (b) the time dependent cases; (c) the limit of very large space charge; (d) the electric field dependence of the electron drift velocity; (e) the effect of longitudinal development of showers; (f) the behavior of the average reductions of response and (g) the non-uniformity of response for different positions of the shower axis inside the cell defined by the electrodes. The NA48 calorimeter is used as application and for comparison of results.

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