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Physics, Multidisciplinary
Yajun Tong, Jiadong Fan, Yonggan Nie, Zhi Guo, Zichen Gao, Xinye Yuan, Bo He, Jiahua Chen, Difei Zhang, Hui Luan, Jianhua Zhang, Donghao Lu, Minghan Xie, Peng Cheng, Chao Feng, Tao Liu, Haixiao Deng, Bo Liu, Zhi Liu, Huaidong Jiang
Summary: This article presents the status report and initial experimental results of the Shanghai Soft X-ray Free-Electron Laser (SXFEL) facility, focusing on the early commissioning of the Kirkpatrick-Baez mirrors for the Coherent Scattering and Imaging (CSI) endstation.
FRONTIERS IN PHYSICS
(2022)
Article
Instruments & Instrumentation
Sergey Stepanov, David Kissick, Oleg Makarov, Mark Hilgart, Michael Becker, Nagarajan Venugopalan, Shenglan Xu, Janet L. Smith, Robert F. Fischetti
Summary: This paper discusses algorithms and procedures for fully automating the retuning of synchrotron radiation beamlines over wide energy ranges. Based on implementations at two research facilities, it shows how software controls the beamline when users select a new energy, protecting the sample from radiation damage during energy changes and optimization.
JOURNAL OF SYNCHROTRON RADIATION
(2022)
Article
Instruments & Instrumentation
Yiyang Wang, Yunpeng Liu, Junxu Mu, Zhaopeng Feng, Xiaobin Tang
Summary: A hard X-ray multilayer collimating/focusing optical system is proposed for X-ray communication, which can achieve high gain and high signal to noise ratio hundreds of kilometers away. The system greatly improves the collection efficiency of hard X-ray and demonstrates good signal to noise ratios at different distances. This work provides theoretical and practical values for improving X-ray communication in space exploration.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2021)
Article
Chemistry, Multidisciplinary
Wentao Song, Zhong Zhang, Qiya Zhang, Jun Yu, Qiushi Huang, Chenyuan Chang, Weihang Hong, Xuewu Wang, Zhanshan Wang
Summary: This study presents the design of ten-shell nested fully annular quasi-ellipsoidal focusing mirrors with an m = 3 Ni/Ti supermirror coating to increase the neutron flux on a sample. The results show that the designed mirrors can enhance the neutron current by a factor of 13 or more compared to without focusing mirrors, and can be adaptable for instruments with changeable sources.
JOURNAL OF APPLIED CRYSTALLOGRAPHY
(2023)
Article
Engineering, Electrical & Electronic
Mohammad Mahdi Taskhiri
Summary: This article presents types of broadband focusing lens in the Ku-band using the ray inserting method, achieving good matching performance and wide bandwidth. Experimental results confirm the designed lens's performance in a wide frequency range.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Instruments & Instrumentation
P. Wojda, S. Kshevetskii, I Lyatun
Summary: A mathematical approach for solving X-ray wave propagation problems through complex optical systems with varying lens thickness has been developed, focusing on the superposition of Gaussian beams satisfying the Helmholtz equation. The study compares focusing and imaging properties of X-ray optics and investigates diffraction effects and influences of thickness jumps on X-ray focusing and imaging in kinoform lenses. Discussions on the potential applications of the developed theory in X-ray optics are also included.
JOURNAL OF SYNCHROTRON RADIATION
(2021)
Article
Geochemistry & Geophysics
Yachao Li, Tinghao Zhang, Haiwen Mei, Yinghui Quan, Mengdao Xing
Summary: This article focuses on accurate 2-D frequency spectrum issues in translational-variant bistatic forward-looking synthetic aperture radar with curved trajectory, proposing a modified omega-K imaging algorithm and introducing methods such as linear range cell migration correction and high-order polynomial fitting, while compensating for spatial-variant Doppler parameters through azimuth resampling.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Optics
Wu Maogang, Yu Yamei, Xu Ruihua, Wu Shaobing, Tang Runsheng
Summary: Solar energy calculation involves calculating solar radiation collected by a solar receiver using solar geometry and radiation data. By selecting and establishing a reasonable coordinate system, the calculation process can be greatly simplified.
ACTA OPTICA SINICA
(2021)
Article
Physics, Multidisciplinary
L. A. Haroutunyan
Summary: The possibility of two-dimensional focusing of hard X-rays diffracted on an ideal crystalline plate is investigated in this study. The Laue geometry of diffraction is assumed, and the incident wave on the crystalline plate is delta-shaped in two mutually perpendicular directions. A Fresnel zone plate with elliptical zones is used for focusing, and numerical simulation of the focusing is performed.
JOURNAL OF CONTEMPORARY PHYSICS-ARMENIAN ACADEMY OF SCIENCES
(2022)
Article
Optics
He Xiaoan, Yi Rongqing, Li Chaoguang, Chen Bolun, Li Fan, Zheng Jianhua, Xue Yanlin, Wang Feng
Summary: This study establishes a method for calibrating the energy sensitivity of hard X-ray detectors based on semiconductor hard X-ray diodes, which is fast and simple. The proposed method successfully calibrates the energy sensitivity of sodium iodide and barium fluoride scintillation detectors in different energy sensitivity ranges and can be applied to the precise calibration of energy transmittance of vacuum isolator.
ACTA OPTICA SINICA
(2022)