Open AccessA numerical investigation on the track distortion at the Micromegas based LPTPC endplate
Author(s) -
Deb Sankar Bhattacharya,
Purba Bhattacharya,
Supratik Mukhopadhyay,
N. Majumdar,
S. Bhattacharya,
Sandip Sarkar,
P. Colas,
D. Attié,
S. Ganjour,
A. Bhattacharya
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1498/1/012021
Subject(s) - micromegas detector , distortion (music) , track (disk drive) , desy , physics , beam (structure) , modular design , electric field , detector , computational physics , computer science , optics , engineering , optoelectronics , mechanical engineering , amplifier , quantum mechanics , operating system , cmos
The R&D activities for the Linear Collider TPC (LCTPC) are currently focused on the adoption of the Micro-Pattern Gaseous Detectors (MPGDs). Different MPGD modules which are commissioned on the endplate of a Large Prototype TPC (LPTPC) at DESY, were tested with a 5 GeV electron beam, under a 1 T magnetic field. During the tests, reduced signal sensitivity as well as distortion in the reconstructed track, were observed at the boundary of these modules. We have numerically investigated the origin of the track distortions observed close to the edges of the Micromegas modules. The study clearly shows that the electric field non-uniformity near the inter-modular gaps is responsible for such track distortion. We have been able to simulate the observed patterns and magnitudes of distortion successfully. The obtained agreements with 2015 beam test data encourage us to continue with the study and, to propose module design modifications that can alleviate the problem of electrostatic field distortion at the module boundaries.