Abstract
A two-dimensional micro-strip Gas Chamber (MSGC) with a 20 × 20 mm2 detection area had been developed. The MSGC had a thin diamond film of 10 μm deposited on a silicon wafer as substrate and lots of micro-strip anode and cathode electrodes made by multi-chip module technology. Energy resolution and pulse signal under 5.9 keV 55 Fe X-rays were measured by a multi-channel energy spectrometer with different voltage under room temperature in atmospheric pressure. Results indicated high signal-to-noise ratio, count rate ≥103 Hz and stable gas gain of the MSGC were obtained. When Ar : CH 4=90:10, drift voltage, cathode voltage and anode voltage was -1000 V, -650 V and 0 V, respectively. However, the energy resolution of 12.3% for 5.9 keV 55 Fe X-rays was achieved. The effects of cathode voltage and drift voltage on energy resolution and count rate were also obtained.
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