Ep. Prendergast et al., PROPERTIES OF CF4 AND ISOBUTANE FOR USE IN MICROSTRIP GAS COUNTERS, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 385(2), 1997, pp. 243-247
The gain of microstrip gas counters (MSGCs) was studied for two of the
most commonly used gases, CF4 and isobutane, in the range of 100 to 1
015 mbar gas pressure and of 100 to 400 V bias voltage. It was found t
hat the microstrip gain decreases with increasing gas pressure, howeve
r the signal induced by non-relativistic ions exhibits a maximum at a
gas-dependent pressure. This behaviour is described by computer simula
tions of the evolution of single-electron avalanches.