Photostimulated phosphor based image plate detection system for HRVUV beamline at Indus-1 synchrotron radiation source

TL;DR

This paper reports the first use of a phosphor-based image plate detection system in a VUV synchrotron beamline, significantly improving spectral recording speed and sensitivity for high-resolution vacuum ultraviolet studies.

Contribution

Introduction of a BaFBr:Eu2+ phosphor image plate detection system for HRVUV beamline, replacing traditional photomultiplier systems, enabling faster and more sensitive spectral measurements.

Findings

Achieved ~0.5 Å spectral resolution for Xe atomic line.

Reproducibility within experimental resolution.

Enhanced sensitivity and signal-to-noise ratio compared to PMT system.

Abstract

A high resolution vacuum ultraviolet (HRVUV) beamline based on a 6.65 meter off-plane Eagle spectrometer is in operation at the Indus-1 synchrotron radiation source, RRCAT, Indore, India. To facilitate position sensitive detection and fast spectral recording, a new BaFBr:Eu2+ phosphor based image plate (IP) detection system interchangeable with the existing photomultiplier (PMT) scanning system has been installed on this beamline. VUV photoabsorption studies on Xe, O2, N2O and SO2 are carried out to evaluate the performance of the IP detection system. An FWHM of ~ 0.5 {\AA} is achieved for the Xe atomic line at 1469.6 {\AA}. Reproducibility of spectra is found to be within the experimental resolution. Compared to the PMT scanning system, the IP shows several advantages in terms of sensitivity, recording time and S/N ratio, which are highlighted in the paper. This is the first report of incorporation of an IP detection system in a VUV beamline using synchrotron radiation. Commissioning of the new detection system is expected to greatly enhance the utilization of the HRVUV beamline as a number of spectroscopic experiments which require fast recording times combined with a good signal to noise ratio are now feasible.