Development of one-coordinate gaseous detector for wide angle diffraction studies

TL;DR

This paper reports the development and testing of a one-coordinate gaseous detector based on GEM technology for wide-angle X-ray scattering, capable of high spatial resolution and suitable for diffraction studies.

Contribution

A novel one-coordinate gaseous detector with GEM technology designed for wide-angle X-ray scattering, featuring high spatial resolution and partial electronics integration.

Findings

Achieved 470 um spatial resolution (FWHM).

Demonstrated detector's ability to distinguish diffraction spots at 0.1 degrees.

Successfully assembled a full-size detector with 67-degree aperture.

Abstract

A one-coordinate gaseous detector of soft X-ray photons for wide-angle X-ray scattering (WAXS) studies is being developed. The detector operates in counting mode and is based on multi-stage Gas Electron Multiplier(GEM). Full size detector is assembled and has 67 degrees aperture with 350mm distance to the source, readout multi-strip structure with 2048 strips at 0.2mm pitch and is partially equipped with readout electronics in the central part. Main parameters of the detector have been measured with 8keV X-ray beam at VEPP-3 synchrotron ring. Spatial resolution of 470 um (FWHM) has been demonstrated that will allow to distinguish diffraction spots at 0.1 degrees.