High order harmonics from relativistic electron spikes
High order harmonics from relativistic electron spikes
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相对论电子尖峰的高次谐波
DOI:
10.1088/1367-2630/16/9/093003
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发表时间:
2014
影响因子:
3.3
通讯作者:
H. Ahmed et al.
中科院分区:
文献类型:
--
作者:
A. S. Pirozhkov;M. Kando;T. Zh. Esirkepov;P. Gallegos;H. Ahmed et al.
A new regime of relativistic high-order harmonic generation has been discovered (Pirozhkov 2012 Phys. Rev. Lett. 108 135004). Multi-terawatt relativistic-irradiance (> 1018 W cm− 2) femtosecond (∼ 30–50fs) lasers focused to underdense (few× 1019 cm− 3) plasma formed in gas jet targets produce comb-like spectra with hundreds of even and odd harmonic orders reaching the photon energy of 360 eV, including the ‘water window’spectral range. Harmonics are generated either by linearly or circularly polarized pulses from the J-KAREN (KPSI, JAEA) and Astra Gemini (CLF, RAL, UK) lasers. The photon number scalability has been demonstrated with a 120TW laser, producing 40μJ sr− 1 per harmonic at 120 eV. The experimental results are explained using particle-in-cell simulations and catastrophe theory. A new mechanism of harmonic generation by sharp, structurally stable, oscillating electron spikes at the joint of the boundaries of the wake and bow waves excited by a laser pulse is introduced. In this paper, detailed descriptions of the experiments, simulations and model are provided and new features are shown, including data obtained with a twochannel spectrograph, harmonic generation by circularly polarized laser pulses and angular distribution.
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DOI:
10.1109/cleopr.2013.6600032
发表时间:
2013
期刊:
2013 Conference on Lasers and Electro-Optics Pacific Rim (CLEOPR)
影响因子:
--
作者:
K. Ogura;M. Kando;T. Esirkepov;T. Pikuz;A. Faenov;Y. Hayashi;H. Kotaki;E. N. Ragozin;D. Neely;H. Kiriyama;T. Shimomura;M. Tanoue;Y. Nakai;M. Okamoto;S. Kondo;S. Kanazawa;J. Koga;Y. Fukuda;M. Nishikino;T. Imazono;N. Hasegawa;T. Kawachi;H. Daido;Y. Kato;P. Bolton;S. Bulanov;K. Kondo;A. Pirozhkov
通讯作者:
A. Pirozhkov
影响因子:
8.6
作者:
Kando, M.;Fukuda, Y.;Tajima, T.
通讯作者:
Tajima, T.
影响因子:
2.6
作者:
F. Pegoraro;T. Esirkepov;S. V. Bulanov
通讯作者:
S. V. Bulanov
影响因子:
8.6
作者:
A. Pirozhkov;M. Mori;K. Ogura;A. Nishimura;H. Murakami;Y. Shimada;A. Sagisaka;S. Orimo;T. Kimura;H. Daido
通讯作者:
H. Daido
影响因子:
1.9
作者:
R. Soufli;E. Gullikson
通讯作者:
E. Gullikson