title: Applications of VUV extra-focus mechanism: high-performance dual-mode monochromator from VUV to soft X-ray.
abstract: A new monochromator scheme is presented in which an extra-focus constant-included-angle varied-line-spacing cylindrical-grating monochromator (extra-focus CIA-VCGM) is conveniently combined with a variable-included-angle varied-line-spacing plane-grating monochromator (VIA-VPGM). This dual-mode solution delivers high performance in the energy range from vacuum ultraviolet (VUV) to soft X-ray. The resolving power and the efficiency of this dual-mode grating monochromator are analyzed in detail based on realistic parameters. Comparisons with the commonly used variable-included-angle plane-grating monochromator and normal-incidence monochromator (VIA-PGM/NIM) hybrid monochromator are made.
authors.affiliation: Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai Synchrotron Radiation Facility, Shanghai, 201800, People's Republic of China.
authors.forename: Chaofan
authors.initials: C
authors.lastname: Xue
authors.affiliation: Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai Synchrotron Radiation Facility, Shanghai, 201800, People's Republic of China.
authors.forename: Yanqing
authors.initials: Y
authors.lastname: Wu
authors.affiliation: Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai Synchrotron Radiation Facility, Shanghai, 201800, People's Republic of China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Zou
authors.affiliation: Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai Synchrotron Radiation Facility, Shanghai, 201800, People's Republic of China.
authors.forename: Lian
authors.initials: L
authors.lastname: Xue
authors.affiliation: Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai Synchrotron Radiation Facility, Shanghai, 201800, People's Republic of China.
authors.forename: Zhi
authors.initials: Z
authors.lastname: Guo
authors.affiliation: Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai Synchrotron Radiation Facility, Shanghai, 201800, People's Republic of China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai Synchrotron Radiation Facility, Shanghai, 201800, People's Republic of China.
authors.forename: Renzhong
authors.initials: R
authors.lastname: Tai
keywords: CIA-VCGM; VIA-VPGM; ultra-wide energy range