Study of ion feedback in multi-GEM structures

Abstract

We study the feedback of positive ions in triple and quadruple Gas Electron Multiplier (GEM) detectors. The effects of GEM hole diameter, detector gain, applied voltages, number of GEMs and other parameters on ion feedback are investigated in detail. In particular, it was found that the ion feedback is independent of the gas mixture and the pressure. In the optimized multi-GEM structure, the ion feedback current can be suppressed down to 0.5% of the anode current, at a drift field of 0.1 kV/cm and gain of 10^4. A simple model of ion feedback in multi-GEM structures is suggested. The results obtained are relevant to the performance of time projection chambers and gas photomultipliers.

9 pages, 11 figures. Submitted to Nucl. Instr. and Meth. A

References in corpus (3)

• Physics of multi-GEM structures
• High pressure operation of the triple-GEM detector in pure Ne, Ar and Xe
• Triple GEM operation in compressed He and Kr

Cited by in corpus (22)

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• Development of high-gain gaseous photomultipliers for the visible spectral range
• Further progress in ion back-flow reduction with patterned gaseous hole-multipliers
• Advances in ion back-flow reduction in cascaded gaseous electron multipliers incorporating R-MHSP elements
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• Electric and Photoelectric Gates for ion backflow suppression in multi-GEM structures
• MHSP in reversed-biased operation mode for ion blocking in gas-avalanche multipliers
• The Photon-Assisted Cascaded Electron Multiplier: a Concept for Potential Avalanche-Ion Blocking
• Studies of THGEM-based detector at low-pressure Hydrogen/Deuterium, for AT-TPC applications
• Ion-induced secondary electron emission from K-Cs-Sb, Na-K-Sb and Cs-Sb photocathodes and its relevance to the operation of gaseous avalanche photomultipliers
• Evolution and Recent Developments of the Gaseous Photon Detectors Technologies
• Characteristic study of a quadruple GEM detector and its comparison with a triple GEM detector
• Nanodiamond photocathodes for MPGD-based single photon detectors at future EIC
• Study of nanodiamond photocathodes for MPGD-based detectors of single photons
• Nanodiamond photocathodes for MPGD-based single photon detectors at future EIC
• Progress in coupling MPGD-based Photon Detectors with Nanodiamond Photocathodes
• Measurement of the ion blocking by the passive bi-polar grid