Speakers
Description
Simulations of propagation and interaction of electrons and ions in Gas Electron Multiplier (GMSs) [1] is performed with Garfiled++ [2] using ANSYS [3] based calculations of potential and structure of GEM stacks. Aim of the simulation study is to optimize the 4-GEM configu- rations to operate a detector in a preferred gain, resolution and ion backflow with gas mixture of Ar:CO2:70:30. The study extends to the effect of various detector geometry structure like rectangular, hexagonal hole positioning and the misalignments of the hole positions from layer to layer. We will present a systematic study of the electron gain, induced signal for electrons and ions, signal shape and resolutions with various transfer fields, induction field and the drift field. A typical working region of the detector is shown in Fig 1. The study would help to understand the behavior of the 4-GEM fabrication in our lab for ALICE-TPC in particular, and a 4-GEM detector in general.
References
[1] F. Sauli, GEM: A new concept for electron amplification in gas detectors, Nucl. Instrum. Meth. A ,386 (1997) 531 - 534
[2] https://cern.ch/garfieldpp
[3] ANSYS Inc., Southpointe. http://www.ansys.com
| Presentation type | Oral |
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