Inverse Compton scattering from solid targets irradiated by ultra-short laser pulses in the 10.sup.22./sup. -10.sup.23./sup. W/cm.sup.2./sup. regime

0535976 - FZÚ 2021 RIV GB eng J - Journal Article
Vyskočil, J. - Gelfer, Evgeny - Klimo, Ondřej
Inverse Compton scattering from solid targets irradiated by ultra-short laser pulses in the 10²² -10²³ W/cm² regime.
Plasma Physics and Controlled Fusion. Roč. 62, č. 6 (2020), s. 1-12, č. článku 064002. ISSN 0741-3335. E-ISSN 1361-6587
R&D Projects: GA ČR GA18-09560S; GA MŠMT LQ1606; GA MŠMT EF15_003/0000449
Grant - others:OP VVV - HiFi(XE) CZ.02.1.01/0.0/0.0/15_003/0000449
Institutional support: RVO:68378271
Keywords : laser plasma * inverse Compton scattering * gamma rays * radiation reaction * foil targets * particle-in-cell
OECD category: Fluids and plasma physics (including surface physics)
Impact factor: 2.458, year: 2020
Method of publishing: Limited access
https://doi.org/10.1088/1361-6587/ab83cb

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.
Permanent Link: http://hdl.handle.net/11104/0313834