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Persistent URL	http://purl.org/net/epubs/work/62519
Record Status	Checked
Record Id	62519
Title	Soft-X-Ray Harmonic Comb from Relativistic Electron Spikes
Contributors	AS Pirozhkov, M Kando, TZ Esirkepov, P Gallegos (STFC Rutherford Appleton Lab., and Strathclyde Univ.), H Ahmed, EN Ragozin, AY Faenov, TA Pikuz, T Kawachi, A Sagisaka, JK Koga, M Coury (Strathclyde Univ.), J Green (STFC Rutherford Appleton Lab.), P Foster (STFC Rutherford Appleton Lab.), C Brenner (STFC Rutherford Appleton Lab., and Strathclyde Univ.), B Dromey, DR Symes (STFC Rutherford Appleton Lab.), M Mori, K Kawase, T Kameshima, Y Fukuda, L Chen, I Daito, K Ogura, Y Hayashi, H Kotaki, H Kiriyama, H Okada, N Nishimori, T Imazono, K Kondo, T Kimura, T Tajima, H Daido, P Rajeev (STFC Rutherford Appleton Lab.), P McKenna (Strathclyde Univ.), M Borghesi, D Neely (STFC Rutherford Appleton Lab., and Strathclyde Univ.), Y Kato, SV Bulanov
Abstract	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.
Organisation	CLF , CLF-HPL , CLF-ASTRA , CI , STFC
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Language	English (EN)

Type	Details	URI(s)	Local file(s)	Year
Journal Article	Phys Rev Lett 108, no. 13 (2012): 135004.	doi:10.1103/PhysRevLett.108.135004		2012