li yang-fang, ma jin-xiu. High-order harmonic generation by relativistic lasers in aMaxwellian distributed plasma[J]. High Power Laser and Particle Beams, 2002, 14.
Citation:
liu yuan-qiong, gao dang-zhong, liu li-xiang, et al. Phase-contrast imaging with micro-focus X-ray source[J]. High Power Laser and Particle Beams, 2006, 18.
li yang-fang, ma jin-xiu. High-order harmonic generation by relativistic lasers in aMaxwellian distributed plasma[J]. High Power Laser and Particle Beams, 2002, 14.
Citation:
liu yuan-qiong, gao dang-zhong, liu li-xiang, et al. Phase-contrast imaging with micro-focus X-ray source[J]. High Power Laser and Particle Beams, 2006, 18.
In conventional radiography, X rays which pass through an object along different paths are differentially absorbed, and the intensity pattern of the emerging beam records the distribution of absorbing materials within the sample. A non-conventional X-ray radiography-phase-contrast imaging is described, which records variations of the phase of the emerging radiation, shows dramatic contrast enhancement for low density or weakly absorbing materials with hard X-ray. A general treatment of X-ray image formation by Fresnel diffraction theory is presented. According to the optical transfer function, the distance of object-image and spatial frequency on the imaging phase-contrast is discussed. Resolution and contrast are the criteria used to specify the visibility of an image, resolution in turn
Dai Chunyan, Yu Chuan, Zhang Guizhong, Xiang Wanghua, Yao Jianquan. H2+和H3+系统的电子频谱与高次谐波谱[J]. High Power Laser and Particle Beams, 2012, 24(06): 1311-1314. doi: 10.3788/HPLPB20122406.1311
li yang-fang, ma jin-xiu. High-order harmonic generation by relativistic lasers in aMaxwellian distributed plasma[J]. High Power Laser and Particle Beams, 2002, 14.
li yang-fang, ma jin-xiu. High-order harmonic generation by relativistic lasers in aMaxwellian distributed plasma[J]. High Power Laser and Particle Beams, 2002, 14.