Design and performance of a 2-D multi-wire position sensitive X-ray detector

Pramana

A M Shaikh¹  J N Joshi¹  S S Desai¹ 

[1] Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India$$

关键词: Radiation detectors;    gas filled proportional counters;    position sensitive detectors;    X-ray diffraction and scattering.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

A 2-D multi-wire position sensitive detector for X-ray diffraction and small angle X-ray scattering studies is described. The detector has an active area of 100 mm × 100 mm and consists of an anode plane with 10 𝜇m SS wires at 3 mm spacing and a pair of orthogonal cathode readout planes with 25 𝜇m SS wires placed at 1.5 mm spacing. The position information is obtained using charge division method and recorded using a laboratory built data acquisition system. The resolution and gas gain was measured for 5.9 keV X-rays (55Fe-source) as a function of the anode wire voltage and gas pressure. It was observed that the proportional region of the PSD at 100 kPa pressure extended up to a high voltage value of around 1.5 kV and it shifted to high values up to 2 kV for gas pressure of 300 kPa. The energy resolution improved from 18% (FWHM) to 12% with increase in pressure. The spatial resolution of the PSD also showed improvement, with a value of 1.2 mm × 1.4 mm at 300 kPa gas pressure. A maximum gain of 5 × 104 is obtained.

【 授权许可】

Unknown