Carbon coated gas electron multipliers
Abstract
Gas electron multipliers (GEMs) have been overcoated with a high resistivity 10 14- 10 15 Ω/ □ amorphous carbon layer. The coating avoids charging up of the holes and provides a constant gain immediately after switching on independent of the rate. The gain uniformity across the GEM is improved. Coating opens the possibility to produce thick GEMs of very high gain.
- Publication:
-
Nuclear Instruments and Methods in Physics Research A
- Pub Date:
- March 1999
- DOI:
- 10.1016/S0168-9002(98)01315-1
- arXiv:
- arXiv:physics/9807039
- Bibcode:
- 1999NIMPA.423..297B
- Keywords:
-
- Instrumentation and Detectors
- E-Print:
- 14 pages, 9 figures, submitted to Nucl. Instr. and Meth. A 1998