Microgap gas chamber studies

Abstract

Hydrogenated amorphous silicon carbide (a-Si:C:H) has been used as an insulating support pedestal for the anode strip in microgap gas chambers (MGCs) in an attempt to make a thicker high quality insulating layer. MGCs having 2.3 or 4.6 pm thick a-Si:C:H and 2.0 ym thick SiOz insulating layers have been built and tested. In this paper, the results of gas gains, strip damage by discharges, and preliminary aging studies are presented.