期刊
OPTICS EXPRESS
卷 22, 期 26, 页码 32098-32106出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.22.032098
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资金
- National Natural Science Foundation of China [11405083, 11347028, 11205243, 11474360, 11374209]
- Natural Science Foundation of Hunan Province, China [13JJ4074]
- Research Foundation of Education Bureau of Hunan Province, China [13A080, 14A120]
- Doctoral Fund of Ministry of Education of China [20134324120003]
- National Basic Research Program of China [2013CBA01504]
- Shanghai Science and Technology Commission [13PJ1403600]
Generation of attosecond x-ray pulse attracts more and more attention within the advanced light source user community due to its potentially wide applications. Here we propose an all-optical scheme to generate bright, attosecond hard x-ray pulse trains by Thomson backscattering of similarly structured electron beams produced in a vacuum channel by a tightly focused laser pulse. Design parameters for a proof-ofconcept experiment are presented and demonstrated by using a particle-incell code and a four-dimensional laser-Compton scattering simulation code to model both the laser-based electron acceleration and Thomson scattering processes. Trains of 200 attosecond duration hard x-ray pulses holding stable longitudinal spacing with photon energies approaching 50 keV and maximum achievable peak brightness up to 10(20) photons/s/mm(2)/mrad(2)/0.1%BW for each micro-bunch are observed. The suggested physical scheme for attosecond x-ray pulse trains generation may directly access the fastest time scales relevant to electron dynamics in atoms, molecules and materials. (c) 2014 Optical Society of America
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