Advances in Thick GEM-like gaseous electron multipliers. Part II: low-pressure operation

Details Advances in Thick GEM-like gaseous electron multipliers. Part II: low-pressure operation Advances in Thick GEM-like gaseous electron multipliers. Part II: low-pressure operation

2006-01-17

arxiv.org/abs/physics/0601119v1

Nucl.Instrum.Meth.A558:468-474,2006

Physics

Instrumentation and Detectors

19 pages, 13 figures. Submitted to Nuclear Instruments and Methods A, Dec 21, 2005

Scientific paper

10.1016/j.nima.2005.12.219

We present results on THGEM operation at low gas pressures, in the range 0.5-50 Torr. Gaseous gain up to 100000 was recorded at 10 Torr of Isobutane in a single multiplier element, with pulses rise-time in the few ns range. Cascaded operation of two THGEMs is reported, with similar total gain but at lower voltages on each element. The present work encompasses a large variety of THGEM geometries and includes electric-field distribution calculations and electron transport simulations. We discuss the operation mechanism and some possible applications of THGEMs at low gas pressures.

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