Laser requirements for high-order harmonic generation by relativistic plasma singularities

0501697 - FZÚ 2019 RIV CH eng J - Journal Article
Pirozhkov, A.S. - Esirkepov, T.Z. - Pikuz, T. A. - Faenov, A.Ya. - Sagisaka, A. - Ogura, K. - Hayashi, Y. - Kotaki, H. - Ragozin, E.N. - Neely, D. - Koga, J.K. - Fukuda, Y. - Nishikino, M. - Imazono, T. - Hasegawa, N. - Kawachi, T. - Daido, H. - Kato, Y. - Bulanov, Sergey V. - Kondo, K. - Kiriyama, H. - Kando, M.
Laser requirements for high-order harmonic generation by relativistic plasma singularities.
Quantum Beam Science. Roč. 2, č. 7 (2018), s. 1-11. E-ISSN 2412-382X
R&D Projects: 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 : high-power femtosecond lasers * high-power laser quality * relativistic laser plasma * relativistic plasma singularities * coherent X-ray generation
OECD category: Fluids and plasma physics (including surface physics)

We discuss requirements on relativistic-irradiance (I0 > 1018 W/cm2) high-power (multi-terawatt) ultrashort (femtosecond) lasers for efficient generation of high-order harmonics in gas jet targets in a new regime discovered recently (Pirozhkov et al., 2012). Here, we present the results of several experimental campaigns performed with different irradiances, analyse the obtained results and derive the required laser parameters. In particular, we found that the root mean square (RMS) wavefront error should be smaller than ~100 nm (~l/8). Further, the angular dispersion should be kept considerably smaller than the diffraction divergence, i.e., rad level for 100–300-mm beam diameters.
Permanent Link: http://hdl.handle.net/11104/0293692