Dinh Thanh Hung, Kondo Yoshiki, Tamura Toshiki, Ono Yuichi, Hara Hiroyuki, Oikawa Hiroki, Yamamoto Yoichi, Ishino Masahiko, Nishikino Masaharu, Makimura Tetsuya, Dunne Padraig, O'Sullivan Gerry, Ohta Shigeru, Kitano Ken, Ejima Takeo, Hatano Tadashi, Higashiguchi Takeshi
Department of Electrical and Electronic Engineering, Faculty of Engineering and Center for Optical Research and Education (CORE), Utsunomiya University, 7-1-2 Yoto, Utsunomiya, Tochigi 321-8585, Japan.
Kansai Photon Science Institute, National Institutes for Quantum and Radiological Science and Technology (QST), 8-1-7 Umemidai, Kizugawa, Kyoto 619-0215, Japan.
Rev Sci Instrum. 2016 Dec;87(12):123106. doi: 10.1063/1.4971421.
A flat-field grazing incidence spectrometer operating on the spectral region from 1 to 10 nm was built for research on physics of high temperature and high energy density plasmas. It consists of a flat-field grating with 2400 lines/mm as a dispersing element and an x-ray charged coupled device (CCD) camera as the detector. The diffraction efficiency of the grating and the sensitivity of the CCD camera were directly measured by use of synchrotron radiation at the BL-11D beamline of the Photon Factory (PF). The influence of contamination to the spectrometer also was characterized. This result enables us to evaluate the absolute number of photons in a wide range wavelength between 1 and 10 nm within an acquisition. We obtained absolutely calibrated spectra from highly charged ion plasmas of Gd, from which a maximum energy conversion efficiency of 0.26% was observed at a Nd:YAG laser intensity of 3 × 10 W/cm.
为了研究高温和高能量密度等离子体物理，构建了一台工作在1至10纳米光谱区域的平场掠入射光谱仪。它由一个每毫米2400线的平场光栅作为色散元件和一个X射线电荷耦合器件（CCD）相机作为探测器组成。利用光子工厂（PF）的BL - 11D光束线的同步辐射直接测量了光栅的衍射效率和CCD相机的灵敏度。还表征了污染对光谱仪的影响。这一结果使我们能够在一次采集内评估1至10纳米宽波长范围内光子的绝对数量。我们从钆的高电荷离子等离子体中获得了绝对校准光谱，在钕钇铝石榴石（Nd:YAG）激光强度为3×10 W/cm时，观察到最大能量转换效率为0.26%。
