Gain Reduction Due to Space Charge at High Counting Rates in Multiwire Proportional Chambers

摘要

Measurements with a small MWPC of gas gain reduction, due to ion space charge at high counting rates, have been compared with theoretical predictions. The quantity ln(q/q sub 0 )/(q/q sub 0 ), where (q/q sub 0 ) is the relative reduced avalanche charge, has been found to be closely proportional to count rate, as predicted. The constant of proportionality is in good agreement with calculations made with a modified version of the original, simplified theory. (ERA citation 12:012197)