Space charge in ionization detectors and the NA48 electromagnetic calorimeter
Abstract
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; (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.
- Publication:
-
Nuclear Instruments and Methods in Physics Research A
- Pub Date:
- January 1999
- DOI:
- 10.1016/S0168-9002(98)01193-0
- Bibcode:
- 1999NIMPA.421...75P