Gas gain stability in MSGCs and MGCs at high-rate operation

• Published in: Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 1997-06, Vol.392 (1), p.94-98
• Main Authors: van den Berg, F.D., Daum, C., van Eijk, B., van Eijk, C.W.E., Hartjes, F.G., van der Marel, J., Udo, F., Zhukov, V.
• Format: Article
• Language: English
• ISSN: 0168-9002; 1872-9576
• DOI: 10.1016/S0168-9002(97)00234-9

MicroStrip Gas Counters (MSGCS) with strip patterns on bare and coated borosilicate glass as well as MicroGap Counters (MGCs) have been irradiated with 5.4 keV X-rays to investigate their high rate capability and ageing behaviour. The application of semiconductive coatings under the strips of MSGCs results in an improved short- and long-term gain stability in comparison to counters with uncoated borosilicate substrates, for count rates up to 10 5 Hz/mm 2. However, the absolute gain of a coated detector is significantly smaller than that of a conventional one. The MGC has high-rate characteristics, as good as those for coated MSGCs. Results on the ageing of MSGCs on coated and uncoated glass, and of the MGC, are presented.