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SR studies and charge-spin percolation modelSheng, Q.*; Kaneko, Tatsuya*; Yamakawa, Kohtaro*; Guguchia, Z.*; Gong, Z.*; Zhao, G.*; Dai, G.*; Jin, C.*; Guo, S.*; Fu, L.*; et al.
Physical Review Research (Internet), 4(3), p.033172_1 - 033172_14, 2022/09
Chen, L. M.*; Wang, W. M.*; Kando, Masaki; Hudson, L. T.*; Liu, F.*; Lin, X. X.*; Ma, J. L.*; Li, Y. T.*; Bulanov, S. V.; Tajima, Toshiki*; et al.
Nuclear Instruments and Methods in Physics Research A, 619, p.128 - 132, 2010/07
Times Cited Count：9 Percentile：54.21(Instruments & Instrumentation)In this report we address the current situation of laser-driven hard X-ray sources for imaging applications, especially the saturation of X-ray conversion efficiency and the serious impact upon imaging quality. By employing high contrast laser pulses, the conversion efficiency to X-rays from solid foil targets is improved and the structure of the spectrum can be optimized with respect to imaging applications. In addition, bright Ar K-shell X-rays with very little continuum background have been generated by irradiating, with an ultra-high contrast laser, a target of Ar gas clusters created by a gas jet. These improvements show great potential for single-shot ultrafast X-ray imaging.
-shell X-ray source from laser-driven Ar clustersChen, L. M.*; Liu, F.*; Wang, W. M.*; Kando, Masaki; Mao, J. Y.*; Zhang, L.*; Ma, J.*; Li, Y. T.*; Bulanov, S. V.; Tajima, Toshiki; et al.
Physical Review Letters, 104(21), p.215004_1 - 215004_4, 2010/05
Times Cited Count：66 Percentile：89.57(Physics, Multidisciplinary)Chen, L.-M.; Kando, Masaki; Xu, M. H.*; Li, Y.-T.*; Koga, J. K.; Chen, M.*; Xu, H.*; Yuan, X.-H.*; Dong, Q. L.*; Sheng, Z. M.*; et al.
Physical Review Letters, 100(4), p.045004_1 - 045004_4, 2008/02
Times Cited Count：93 Percentile：92.69(Physics, Multidisciplinary)We observed the increase of the K-
X-ray conversion efficiency (hK) produced by a 60 fs frequency doubled high contrast laser pulse focused on Cu foil, compared to the case of the fundamental laser pulse. hK shows a strong dependence on the nonlinearly skewed shape of the laser pulse. It reaches a maximum for a 100 fs negatively skewed pulse. The electron spectrum shaping contributes to the enhancement of hK. Simulations demonstrate that high contrast lasers are an effective tool for optimizing the X-ray emission, via the enhanced Vacuum Heating mechanism.
