Modelling and Measurement of Charge Transfer in Multiple GEM Structures

Abstract

Measurements and numerical simulations on the charge transfer in Gas Electron Multiplier (GEM) foils are presented and their implications for the usage of GEM foils in Time Projection Chambers are discussed. A small test chamber has been constructed and operated with up to three GEM foils. The charge transfer parameters derived from the electrical currents monitored during the irradiation with an Fe-55 source are compared with numerical simulations. The performance in magnetic fields up to 2 T is also investigated.

21 pages, 16 figures, submitted to NIM-A

Cited by in corpus (6)

• Charge Transfer and Charge Broadening of GEM Structures in High Magnetic Fields
• Development of a Time Projection Chamber Using Gas Electron Multipliers (GEM-TPC)
• Secondary discharge studies in single and multi GEM structures
• Measurements of the Charging-Up Effect in Gas Electron Multipliers
• Ion backflow studies with a triple-GEM stack with increasing hole pitch
• Analytic approximation of energy resolution in cascaded gaseous detectors