Space charge effects and induced signals in resistive plate chambers
نویسندگان
چکیده
Using special integral representations of the solution for the static electric field of a point charge in a three layer geometry with different permittivities, we calculate the effect of the space charge on the avalanche in the gas gap of an RPC. A detailed Monte Carlo simulation was developed which allows calculation of the actual charge spectrum. Results of this simulation are presented, using the example of a trigger-RPC with 2 mm gas gap, similar to the ones used by ATLAS (ATLAS TDR 10, CERN-LHCC-97-22), and a timing RPC with 300 mm gas gap (Nucl. Instr. and Meth. A 449 (2000) 295). Finally, we also present analytic solutions for the weighting field of an RPC readout strip, which allow to calculate the directly induced crosstalk and induced signals. r 2003 Elsevier Science B.V. All rights reserved. PACS: 07.05.Tp; 29.40.Cs
منابع مشابه
Simulation of Space Charge Effects in Resistive Plate Chambers
Multigap resistive plate chambers [1] with 0.3-mm gas gaps operated in avalanche mode at atmospheric pressure have reached timing accuracies below 50 ps (standard deviation) with efficiencies above 99% [2]. The avalanches in high homogeneous electric fields of 100 kV/cm are strongly influenced by space charge effects which are the main topic of this paper. We extend a previously discussed Monte...
متن کاملSpace Charge Effects in Resistive Plate Chambers
We extend an existing one dimensional simulation model for avalanche mode RPCs by the inclusion of diffusion and space charge effects. We investigate the influence of space charge on charge spectra, signal rise time, time resolution and charge-to-time correlation. We present a 1.5-dimensional model, which allows fast simulation of events and a two dimensional model that is slower but allows to ...
متن کاملInduced signals in resistive plate chambers
We derive theorems for induced signals on electrodes embedded in a medium with a position and frequencydependent permittivity eð~x; sÞ and conductivity sð~x; sÞ that are connected with arbitrary discrete elements. The problem is treated using the quasi-static approximation of Maxwell’s equations for weakly conducting media. The induced signals can be derived by time-dependent weighting fields a...
متن کاملThe simulation of resistive plate chambers in avalanche mode: charge spectra and e$ciency
A model to simulate the avalanche formation process and the induced signal in a Resistive Plate Chamber is presented. A "rst investigation of the e!ects of various parameters on the performance of this detector is reported. ( 1999 Published by Elsevier Science B.V. All rights reserved.
متن کاملObservation of light from resistive plate chambers
Electrically induced signals and light emissions from Restrictive Plate Chamber (RPC) are simultaneously measured using a glass RPC with transparent high-voltage planes, operating in the streamer mode. With one exception, good correspondence is seen in between the electrical and optical signals in every aspect: signal shapes, pulse heights, timing and afterpulses. The one exception is a possibl...
متن کامل