Track distortion in the Large prototype of a Time Projection Chamber for the International Linear Collider

27th IUPAP Conference on Computational Physics

物理学;计算机科学

Bhattacharya, Deb Sankar^1,3,4 ; Bhattacharya, Purba^2 ; Mukhopadhyay, Supratik^1 ; Majumdar, Nayana^1 ; Bhattacharya, Sudeb^5 ; Sarkar, Sandip^1 ; Colas, Paul^3 ; Attie, David^3 ; Ganjour, Serguei^3 ; Bhattacharya, Aparajita^4

Applied Nuclear Physics Division, Saha Institute Nuclear Physics, Kolkata , West Bengal

700064, India^1

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

Odisha

752050, India^2

DSM/IRFU/SPP, CEA Saclay, Gif Sur Yvette

91191, France^3

Department of Physics, Jadavpur University, Jadavpur, Kolkata

West Bengal

700032, India^4

Retired Senior Prof., Applied Nuclear Physics Division, Saha Institute of Nuclear Physics, Kolkata

700064, India^5

关键词: End;    plates;    Field lines;    GeV electron beam;    International Linear Collider;    Peripheral frames;    Simulated results;    Spatial resolution;    Time projection chambers;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/759/1/012075/pdf
DOI  :  10.1088/1742-6596/759/1/012075

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

A Micromegas (MM) based Time Projection Chamber (TPC) can meet the ILC requirements of continuous 3-D tracking, excellent spatial resolution and efficient pattern recognition. Seven MM modules which are commissioned on the end-plate of a Large Prototype TPC (LPTPC) at DESY, have been tested with a 5 GeV electron beam, under a 1 T magnetic field. Due to the grounded peripheral frame of the MM modules, at short drift, the electric field near the detector edge remain no longer parallel to the TPC axis. This causes signal loss along the boundaries of the MM modules as well as distortion in the reconstructed track. In presence of magnetic field, the distorted electric field introduces E×B effect. A detailed numerical study has been accomplished to understand the features of this distortion. Four Micromegas modules have been simulated resembling the experimental setup. The field lines, drift line of electrons considering diffusion in gas, nature of track distortion, residuals are numerically calculated in presence and in absence of magnetic field. The E×B effect has been simulated as well. Simulated results follow the experimental observations.