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 mu J/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.
| Original language | English |
|---|---|
| Article number | 135004 |
| Pages (from-to) | - |
| Number of pages | 5 |
| Journal | Physical Review Letters |
| Volume | 108 |
| Issue number | 13 |
| DOIs | |
| Publication status | Published - 30 Mar 2012 |
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Keywords
- x-ray harmonic comb
- harmonic comb
- relativistic electron spikes
- electron spikes
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Soft-x-ray harmonic comb from relativistic electron spikes. / 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.
In: Physical Review Letters, Vol. 108, No. 13, 135004, 30.03.2012, p. -.Research output: Contribution to journal › Article
TY - JOUR
T1 - Soft-x-ray harmonic comb from relativistic electron spikes
AU - Pirozhkov, A. S.
AU - Kando, M.
AU - Esirkepov, T. Zh
AU - Gallegos, P.
AU - Ahmed, H.
AU - Ragozin, E. N.
AU - Faenov, A. Ya
AU - Pikuz, T. A.
AU - Kawachi, T.
AU - Sagisaka, A.
AU - Koga, J. K.
AU - Coury, M.
AU - Green, J.
AU - Foster, P.
AU - Brenner, C.
AU - Dromey, B.
AU - Symes, D. R.
AU - Mori, M.
AU - Kawase, K.
AU - Kameshima, T.
AU - Fukuda, Y.
AU - Chen, L.
AU - Daito, I.
AU - Ogura, K.
AU - Hayashi, Y.
AU - Kotaki, H.
AU - Kiriyama, H.
AU - Okada, H.
AU - Nishimori, N.
AU - Imazono, T.
AU - Kondo, K.
AU - Kimura, T.
AU - Tajima, T.
AU - Daido, H.
AU - Rajeev, P.
AU - McKenna, P.
AU - Borghesi, M.
AU - Neely, D.
AU - Kato, Y.
AU - Bulanov, S. V.
PY - 2012/3/30
Y1 - 2012/3/30
N2 - 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 mu J/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.
AB - 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 mu J/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.
KW - x-ray harmonic comb
KW - harmonic comb
KW - relativistic electron spikes
KW - electron spikes
UR - http://www.scopus.com/inward/record.url?scp=84859336923&partnerID=8YFLogxK
UR - http://arxiv.org/abs/1201.0333
U2 - 10.1103/PhysRevLett.108.135004
DO - 10.1103/PhysRevLett.108.135004
M3 - Article
VL - 108
SP - -
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 13
M1 - 135004
ER -