Investigation of Micropatent Gaseous Detector for X-ray Polarimetry
Abstract
We present an investigation of the Micropatent Gaseous Detector (THGEM and MicroMegas) for the X-ray polarimeter. THGEMs with different thickness and diameter have been studied with vary electrical parameter. The energy resolution of 15.9% with 5.9 keV X-rays was obtained for the thinner-THGEM. MicroMegas with ITO glass has been assembled and tested in Ne-5%CF _{4} which emits light during the electron multiplication. The track of the primary photoelectron excited by the incident X-ray was imaged on an intensified CCD. For the expected sensitivity of the polarimeter, we used the Monte Carlo package Geant4 and Garfield to simulate the charge distribution of the photoelectron, diffusion of the charge track during drift and track image of the detector. The associated Monte Carlo calculation of energy resolution dependence on drift electric field and induction field has been compared with the experimental results.
- Publication:
-
41st COSPAR Scientific Assembly
- Pub Date:
- July 2016
- Bibcode:
- 2016cosp...41E1176L