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Reduction of ion back flow using a quadruple GEM detector with various gas mixtures

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arxiv 2110.08838 v1 pith:LFUS7RVN submitted 2021-10-17 physics.ins-det

Sourav Tarafdar , Senta V. Greene , Julia Velkovska , Brandon Blankenship , Michael Z. Reynolds ( Vanderbilt University , Nashville , USA) This is my paper · ORCID
classification physics.ins-det
keywords layersbackdetectorsgaseousquadrupletrackingvolumeactive
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In gaseous tracking detectors with a large gaseous volume multiple layers of Gas Electron Multipliers (GEM) can be used to block positive ions from flowing back into the active volume, which is detrimental to the tracking performance. We report on studies of effective gain, ion backflow (IBF), and energy resolution in quadruple GEM detectors, and on strategies for minimizing IBF by optimizing the operating voltages of the individual GEM layers and the potential differences between different layers.

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