Space charge in ionization detectors and the NA48 electromagnetic calorimeter

S. Palestini*, G. D. Barr, C. Biino, P. Calafiura, A. Ceccucci, C. Cerri, J. C. Chollet, M. Cirilli, J. Cogan, F. Costantini, S. Crépé, D. Cundy, R. Fantechi, L. Fayard, G. Fischer, A. Formica, P. L. Frabetti, W. Funk, A. Gianoli, S. GiudiciA. Gonidec, B. Gorini, G. Govi, L. Iconomidou-Fayard, V. Kekelidze, W. Kubischta, S. Luitz, I. Mannelli, M. Martini, I. Mikulec, A. Norton, J. Ocariz, D. Schinzel, M. Sozzi, G. Tatishvili, A. Tkatchev, G. Unal, M. Velasco, O. Vossnack, H. Wahl

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


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; (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 behaviour 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.

Original languageEnglish (US)
Pages (from-to)75-89
Number of pages15
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Issue number1-2
StatePublished - Jan 21 1999


  • Electromagnetic calorimeters
  • Ion mobility
  • Ionization detectors
  • Liquid noble gases
  • Space charge

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation


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