Indus-1同步辐射光源HRVUV光束线的光激励荧光像板探测系统
Photostimulated phosphor based image plate detection system for HRVUV beamline at Indus-1 synchrotron radiation source
摘要：
基于6.65米离面Eagle光谱仪的高分辨率真空紫外（HRVUV）光束线在印度RRCAT的Indus-1同步辐射源上运行。为了便于位置敏感检测和快速光谱记录，一个新的BaFBr：Eu 2+荧光粉为基础的图像板（IP）检测系统与现有的光电倍增管（PMT）扫描系统互换已安装在此光束线。利用真空紫外光吸收光谱研究了该IP探测系统对CO_2、O_2、N_2O和SO_2的吸收特性。在1469.6 μ m处获得了~ 0.5 μ m的半高宽。光谱的重现性被发现是在实验分辨率。与PMT扫描系统相比，IP在灵敏度、记录时间和信噪比方面显示出了几个优势。这是第一个报告的IP检测系统的结合在真空紫外光束线使用同步辐射。新的检测系统的调试，预计将大大提高利用的HRVUV光束线的光谱实验，需要快速的记录时间结合良好的信噪比，现在是可行的。
英文摘要：
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 Å is achieved for the Xe atomic line at 1469.6 Å. 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.
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