Electron collection and ion feedback in GEM-based detectors

Electron collection and ion feedback in GEM-based detectors

We report the results of systematic experimental investigations on electron transmission and ion feedback in a single gas electron multiplier (GEM) detector for the operating region close to unity gain. Critical factors for obtaining good collection are the transverse diffusion coefficient and the h...

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Veröffentlicht in:IEEE transactions on nuclear science 2003-08, Vol.50 (4), p.803-808
Hauptverfasser: Sauli, F., Kappler, S., Ropelewski, L.
Format: Artikel
Sprache:eng
Schlagworte:
Assembly
Chambers
Collection
Current measurement
Detectors
Diffusion coefficient
Electrodes
Electron multipliers
Feedback
Gain
Gain measurement
Ionization
Magnetic field measurement
Projection
Unity
Voltage
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Beschreibung
Zusammenfassung:We report the results of systematic experimental investigations on electron transmission and ion feedback in a single gas electron multiplier (GEM) detector for the operating region close to unity gain. Critical factors for obtaining good collection are the transverse diffusion coefficient and the hole diameter. A unit gain GEM can be used for instance as first element in a cascade to improve collection efficiency and ion feedback suppression in time projection chambers.
ISSN:0018-9499
1558-1578
DOI:10.1109/TNS.2003.814543