Detailed 3D Simulation of the GEM-based detector

27th IUPAP Conference on Computational Physics

物理学;计算机科学

Bhattacharya, P.^1 ; Biswas, S.^2 ; Mohanty, B.^1 ; Majumdar, N.^3 ; Mukhopadhyay, S.^3

School of Physical Science, National Institute of Science Education and Research, Jatni, Khurda

Odisha

752050, India^1

Physics Department, Bose Institute, EN, Saltlake Kolkata

700091, India^2

Applied Nuclear Physics Department, Saha Institute of Nuclear Phyics, 1/AF, Bidhannagar, Kolkata

700064, India^3

关键词: Detector geometry;    Different geometry;    Electrical parameter;    Electron transparency;    Fundamental features;    Gas electron multipliers;    Physics experiments;    Simulation framework;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/759/1/012071/pdf
DOI  :  10.1088/1742-6596/759/1/012071

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

The operation of Micro Pattern Gaseous Detectors (MPGDs) has often suffered from effects such as distortion of the electric field due to space charge, despite their widespread use in particle-physics and nuclear-physics experiments, astro-particle research, medical imaging, material science etc. To keep distortions due to space-charge at a manageable level, a lower ion feedback is required while maintaining substantial detector gain and good resolution. Thus, a proper optimization of the detector geometry, field configuration and gas mixtures are required to have a higher electron transparency and lower ion backflow. In our work, Garfield simulation framework has been adopted as a tool to evaluate the fundamental features of Gas Electron Multiplier (GEM). Our study begins with the computation of electrostatic field and its variation with different geometrical and electrical parameters using the neBEM toolkit. Different efficient algorithms have been implemented to increase the computational efficiency of the field solver. Finally, ion backflow and electron transparency of single and quadruple GEMs with different geometry and field configurations suitable for the ALICE-TPC, have been studied.