Details

Autor(en) / Beteiligte

• Pirozhkov, A S
• Kando, M
• Esirkepov, T Zh
• Gallegos, P
• Ahmed, H
• Ragozin, E N
• Faenov, A Ya
• Pikuz, T A
• Kawachi, T
• Sagisaka, A
• Koga, J K
• Coury, M
• Green, J
• Foster, P
• Brenner, C
• Dromey, B
• Symes, D R
• Mori, M
• Kawase, K
• Kameshima, T
• Fukuda, Y
• Chen, L
• Daito, I
• Ogura, K
• Hayashi, Y
• Kotaki, H
• Kiriyama, H
• Okada, H
• Nishimori, N
• Imazono, T
• Kondo, K
• Kimura, T
• Tajima, T
• Daido, H
• Rajeev, P
• McKenna, P
• Borghesi, M
• Neely, D
• Kato, Y
• Bulanov, S V

Titel

Soft-x-ray harmonic comb from relativistic electron spikes

Ist Teil von

• Physical review letters, 2012-03, Vol.108 (13), p.135004-135004, Article 135004

Ort / Verlag

United States

Erscheinungsjahr

2012

Quelle

American Physical Society [PROLA]

Beschreibungen/Notizen

• We demonstrate a new high-order harmonic generation mechanism reaching the "water window" spectral region in experiments with multiterawatt femtosecond lasers irradiating gas jets. A few hundred harmonic orders are resolved, giving μJ/sr pulses. Harmonics are collectively emitted by an oscillating electron spike formed at the joint of the boundaries of a cavity and bow wave created by a relativistically self-focusing laser in underdense plasma. The spike sharpness and stability are explained by catastrophe theory. The mechanism is corroborated by particle-in-cell simulations.