期刊
PLASMA PHYSICS AND CONTROLLED FUSION
卷 62, 期 6, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1361-6587/ab83cb
关键词
laser plasma; inverse Compton scattering; gamma rays; radiation reaction; foil targets; particle-in-cell
资金
- Ministry of Education, Youth and Sports from the National Programme of Sustainability II [LQ1606]
- project ELITAS from the European Regional Development Fund [CZ.02.1.01/0.0/0.0/16 013/0001793]
- project HiFI from the European Regional Development Fund [CZ.02.1.01/0.0/0.0/15 003/0000449]
- GACR project [18-09560S]
- UK Engineering and Physics Sciences Research Council [EP/G054940/1, EP/G055165/1, EP/G056803/1]
- ELI related grants
- Ministry of Education, Youth and Sports from the Large Infrastructures for Research, Experimental Development and Innovations project IT4Innovations National Supercomputing Center [LM2015070]
- [SGS16/248/OHK4/3T/14]
Emission of high energy gamma rays via the non-linear inverse Compton scattering process (ICS) in interactions of ultra-intense laser pulses with thin solid foils is studied using particle-in-cell simulations. It is shown that the angular distribution of the ICS photons has a forward-oriented two-directional structure centred at an angle & thetasym; =+/- 30 degrees, a value which corresponds to a model based on a standing wave approximation to the electromagnetic field in front of the target, which only increases at the highest intensities due to faster hole boring, which renders the approximation invalid. The conversion efficiency is shown to exhibit a super-linear increase with the driving pulse intensity. In comparison to emission via electron-nucleus bremsstrahlung, it is shown that the higher absorption, further enhanced by faster hole boring, in the targets with lower atomic number strongly favours the ICS process.
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