Higher order harmonics suppression in extreme ultraviolet and soft x-ray  

作　　者：陈勇 魏来 钱凤 杨祖华 王少义 巫殷忠 张强强 范全平 曹磊峰 

机构地区：[1]Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion,China Academy of Engineering Physics

出　　处：《Chinese Physics B》2018年第2期344-348,共5页中国物理B（英文版）

基　　金：Project supported by the National Key Research and Development Program of China(Grant No.2017YFA0206004);the National Natural Science Foundation of China(Grant No.11375160);the National Science Instruments Major Project of China(Grant No.2012YQ130125)

摘　　要：The extreme ultraviolet and soft x-ray sources are widely used in various domains. Suppressing higher order harmonics and improving spectral purity are significant. This paper describes a novel method of higher order harmonics suppression with single order diffraction gratings in extreme ultraviolet and soft x-ray. The principle of harmonic suppression with single order diffraction grating is described, and an extreme ultraviolet and soft x-ray non-harmonics grating monochromator is designed based on the single order diffraction grating. The performance is simulated by an optical design software. The emergent beams of a monochromator with different gratings are measured by a transmission grating spectrometer. The results show that the single order diffraction grating can suppress higher order harmonics effectively, and it is expected to be widely used in synchrotron radiation, diagnostics of laser induced plasma, and astrophysics.The extreme ultraviolet and soft x-ray sources are widely used in various domains. Suppressing higher order harmonics and improving spectral purity are significant. This paper describes a novel method of higher order harmonics suppression with single order diffraction gratings in extreme ultraviolet and soft x-ray. The principle of harmonic suppression with single order diffraction grating is described, and an extreme ultraviolet and soft x-ray non-harmonics grating monochromator is designed based on the single order diffraction grating. The performance is simulated by an optical design software. The emergent beams of a monochromator with different gratings are measured by a transmission grating spectrometer. The results show that the single order diffraction grating can suppress higher order harmonics effectively, and it is expected to be widely used in synchrotron radiation, diagnostics of laser induced plasma, and astrophysics.

关 键 词：higher order harmonics suppression extreme ultraviolet and soft x-ray monochromator single order diffraction grating 

分 类 号：O434.1[机械工程—光学工程]