One-dimensional space resolving flat-field holographic grating soft x-ray framing camera spectrograph for laser plasma diagnostics

Gang Xiong; Zhimin Hu; Hang Li; Yang Zhao; Wanli Shang; Tuo Zhu; Minxi Wei; Guohong Yang; Jiyan Zhang; Jiamin Yang

doi:10.1063/1.3579494

One-dimensional space resolving flat-field holographic grating soft x-ray framing camera spectrograph for laser plasma diagnostics

Rev Sci Instrum. 2011 Apr;82(4):043109. doi: 10.1063/1.3579494.

Authors

Gang Xiong¹, Zhimin Hu, Hang Li, Yang Zhao, Wanli Shang, Tuo Zhu, Minxi Wei, Guohong Yang, Jiyan Zhang, Jiamin Yang

Affiliation

¹ Research Center of Laser Fusion, China Academy of Engineering Physics, P.O. Box 919-986, Mianyang 621900, People's Republic of China.

PMID: 21528997
DOI: 10.1063/1.3579494

Abstract

A 1D space resolving x-ray spectrum diagnostic system has been developed to study the radiation opacity of hot plasma on SG-II laser facility. The diagnostic system consists of a 2400 lines/mm flat-field holographic grating and a gated microchannel plate coupled with an optical CCD and covers the wavelength range of 5-50 Å. The holographic grating was compared with a ruled one by measuring the emission spectra from a laser-produced molybdenum plasma. The results indicate that the holographic grating possesses better sensitivity than the ruled grating having nearly similar spectral resolution. The spectrograph has been used in radiative opacity measurement of Fe plasma. Simultaneous measurements of the backlight source and the transmission spectrum in appointed time range in one shot have been accomplished successfully with the holographic grating spectrometer. The 2p-3d transition absorption of Fe plasma near 15.5 Å in has been observed clearly.