Title :
Electron collection and ion feedback in GEM-based detectors
Author :
Sauli, Fabio ; Kappler, Steffen ; Ropelewski, Leszek
Author_Institution :
CERN, Geneva, Switzerland
Abstract :
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.
Keywords :
circuit feedback; electron detection; ionisation chambers; photomultipliers; position sensitive particle detectors; GEM-based detectors; electron collection; electron transmission; gaseous detectors; ion feedback; single gas electron multiplier; time projection chambers; transverse diffusion coefficient; Assembly; Current measurement; Detectors; Electrodes; Electron multipliers; Feedback; Gain measurement; Ionization; Magnetic field measurement; Voltage;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.2003.814543
