Coherent X-ray generation in relativistic laser - Gas jet interactions

A. S. Pirozhkov; M. Kando; T. Zh Esirkepov; P. Gallegos; H. Ahmed; E. N. Ragozin; A. Ya Faenov; T. A. Pikuz; J. K. Koga; H. Kiriyama; P. McKenna; M. Borghesi; K. Kondo; H. Daido; Y. Kato; D. Neely; S. V. Bulanov

doi:10.1117/12.892898

Coherent X-ray generation in relativistic laser - Gas jet interactions

A. S. Pirozhkov^*, M. Kando, T. Zh Esirkepov, P. Gallegos, H. Ahmed, E. N. Ragozin, A. Ya Faenov, T. A. Pikuz, J. K. Koga, H. Kiriyama, P. McKenna, M. Borghesi, K. Kondo, H. Daido, Y. Kato, D. Neely, S. V. Bulanov

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution book

5 Citations (Scopus)

Abstract

We present experimental results, theory, and simulations demonstrating two novel sources of coherent X-ray radiation generated in the relativistic laser (>10 ¹⁸W/cm ²) interaction with easily accessible, repetitive, and debris-free gas jet targets. The first source is based on a relativistic mirror reflecting a counter-propagating laser pulse. A strongly nonlinear breaking wake wave driven by an intense laser pulse can act as a semi-transparent relativistic flying mirror. Such a mirror directly converts counter-propagating laser light into a high-frequency (XUV or X-ray) ultrashort pulse due to the double Doppler effect. In the experimental demonstration with the 9 TW J-KAREN laser, the flying mirror generated in a He gas jet partially reflected a 1 TW pulse, providing up to ∼1010 photons, 60 nJ (∼1012 photons/sr) in the XUV range (12.8-22 nm). The second source is demonstrated with the laser power ranging from 9 to 170 TW in experiments with the J-KAREN and Astra Gemini lasers. The odd and even order harmonics generated by linearly as well as circularly polarized pulses are emitted forward out of the gas jet. The 120 TW laser pulses produce harmonics with ∼3×10 ¹³ photons/sr (∼600 μJ/sr) in the 120±5 eV spectral range. The observed harmonics cannot be explained by previously known mechanisms (atomic harmonics, betatron radiation, nonlinear Thomson scattering, etc.). We introduce a novel mechanism of harmonic generation based on the relativistic laser-plasma phenomena (self-focusing, cavity evacuation, bow wave generation), mathematical catastrophe theory which explains the formation of structurally stable electron density singularities, spikes, and collective radiation of a compact charge driven by a relativistic laser.

Original language	English
Title of host publication	X-Ray Lasers and Coherent X-Ray Sources
Subtitle of host publication	Development and Applications IX
Editors	James Dunn, Annie Klisnick
Place of Publication	Bellingham, WA
Volume	8140
DOIs	https://doi.org/10.1117/12.892898
Publication status	Published - 5 Oct 2011
Event	X-Ray Lasers and Coherent X-Ray Sources: Development and Applications IX - San Diego, CA, United States Duration: 23 Aug 2011 → 25 Aug 2011

Conference

Conference	X-Ray Lasers and Coherent X-Ray Sources: Development and Applications IX
Country/Territory	United States
City	San Diego, CA
Period	23/08/11 → 25/08/11

Keywords

catastrophe theory
coherent X-rays
double doppler effect
electron spikes
high-order harmonics
particle-in-cell simulation
relativistic flying mirror
relativistic laser plasma

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10.1117/12.892898

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Pirozhkov, A. S., Kando, M., Esirkepov, T. Z., Gallegos, P., Ahmed, H., Ragozin, E. N., Faenov, A. Y., Pikuz, T. A., Koga, J. K., Kiriyama, H., McKenna, P., Borghesi, M., Kondo, K., Daido, H., Kato, Y., Neely, D., & Bulanov, S. V. (2011). Coherent X-ray generation in relativistic laser - Gas jet interactions. In J. Dunn, & A. Klisnick (Eds.), X-Ray Lasers and Coherent X-Ray Sources: Development and Applications IX (Vol. 8140). Article 81400A. https://doi.org/10.1117/12.892898

@inproceedings{757015e001ae44319923b5b277a90dca,

title = "Coherent X-ray generation in relativistic laser - Gas jet interactions",

abstract = "We present experimental results, theory, and simulations demonstrating two novel sources of coherent X-ray radiation generated in the relativistic laser (>10 18W/cm 2) interaction with easily accessible, repetitive, and debris-free gas jet targets. The first source is based on a relativistic mirror reflecting a counter-propagating laser pulse. A strongly nonlinear breaking wake wave driven by an intense laser pulse can act as a semi-transparent relativistic flying mirror. Such a mirror directly converts counter-propagating laser light into a high-frequency (XUV or X-ray) ultrashort pulse due to the double Doppler effect. In the experimental demonstration with the 9 TW J-KAREN laser, the flying mirror generated in a He gas jet partially reflected a 1 TW pulse, providing up to ∼1010 photons, 60 nJ (∼1012 photons/sr) in the XUV range (12.8-22 nm). The second source is demonstrated with the laser power ranging from 9 to 170 TW in experiments with the J-KAREN and Astra Gemini lasers. The odd and even order harmonics generated by linearly as well as circularly polarized pulses are emitted forward out of the gas jet. The 120 TW laser pulses produce harmonics with ∼3×10 13 photons/sr (∼600 μJ/sr) in the 120±5 eV spectral range. The observed harmonics cannot be explained by previously known mechanisms (atomic harmonics, betatron radiation, nonlinear Thomson scattering, etc.). We introduce a novel mechanism of harmonic generation based on the relativistic laser-plasma phenomena (self-focusing, cavity evacuation, bow wave generation), mathematical catastrophe theory which explains the formation of structurally stable electron density singularities, spikes, and collective radiation of a compact charge driven by a relativistic laser.",

keywords = "catastrophe theory, coherent X-rays, double doppler effect, electron spikes, high-order harmonics, particle-in-cell simulation, relativistic flying mirror, relativistic laser plasma",

author = "Pirozhkov, {A. S.} and M. Kando and Esirkepov, {T. Zh} and P. Gallegos and H. Ahmed and Ragozin, {E. N.} and Faenov, {A. Ya} and Pikuz, {T. A.} and Koga, {J. K.} and H. Kiriyama and P. McKenna and M. Borghesi and K. Kondo and H. Daido and Y. Kato and D. Neely and Bulanov, {S. V.}",

year = "2011",

month = oct,

day = "5",

doi = "10.1117/12.892898",

language = "English",

isbn = "9780819487506",

volume = "8140",

editor = "James Dunn and Annie Klisnick",

booktitle = "X-Ray Lasers and Coherent X-Ray Sources",

note = "X-Ray Lasers and Coherent X-Ray Sources: Development and Applications IX ; Conference date: 23-08-2011 Through 25-08-2011",

}

Pirozhkov, AS, Kando, M, Esirkepov, TZ, Gallegos, P, Ahmed, H, Ragozin, EN, Faenov, AY, Pikuz, TA, Koga, JK, Kiriyama, H, McKenna, P, Borghesi, M, Kondo, K, Daido, H, Kato, Y, Neely, D & Bulanov, SV 2011, Coherent X-ray generation in relativistic laser - Gas jet interactions. in J Dunn & A Klisnick (eds), X-Ray Lasers and Coherent X-Ray Sources: Development and Applications IX. vol. 8140, 81400A, Bellingham, WA, X-Ray Lasers and Coherent X-Ray Sources: Development and Applications IX, San Diego, CA, United States, 23/08/11. https://doi.org/10.1117/12.892898

TY - GEN

T1 - Coherent X-ray generation in relativistic laser - Gas jet interactions

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 - Koga, J. K.

AU - Kiriyama, H.

AU - McKenna, P.

AU - Borghesi, M.

AU - Kondo, K.

AU - Daido, H.

AU - Kato, Y.

AU - Neely, D.

AU - Bulanov, S. V.

PY - 2011/10/5

Y1 - 2011/10/5

N2 - We present experimental results, theory, and simulations demonstrating two novel sources of coherent X-ray radiation generated in the relativistic laser (>10 18W/cm 2) interaction with easily accessible, repetitive, and debris-free gas jet targets. The first source is based on a relativistic mirror reflecting a counter-propagating laser pulse. A strongly nonlinear breaking wake wave driven by an intense laser pulse can act as a semi-transparent relativistic flying mirror. Such a mirror directly converts counter-propagating laser light into a high-frequency (XUV or X-ray) ultrashort pulse due to the double Doppler effect. In the experimental demonstration with the 9 TW J-KAREN laser, the flying mirror generated in a He gas jet partially reflected a 1 TW pulse, providing up to ∼1010 photons, 60 nJ (∼1012 photons/sr) in the XUV range (12.8-22 nm). The second source is demonstrated with the laser power ranging from 9 to 170 TW in experiments with the J-KAREN and Astra Gemini lasers. The odd and even order harmonics generated by linearly as well as circularly polarized pulses are emitted forward out of the gas jet. The 120 TW laser pulses produce harmonics with ∼3×10 13 photons/sr (∼600 μJ/sr) in the 120±5 eV spectral range. The observed harmonics cannot be explained by previously known mechanisms (atomic harmonics, betatron radiation, nonlinear Thomson scattering, etc.). We introduce a novel mechanism of harmonic generation based on the relativistic laser-plasma phenomena (self-focusing, cavity evacuation, bow wave generation), mathematical catastrophe theory which explains the formation of structurally stable electron density singularities, spikes, and collective radiation of a compact charge driven by a relativistic laser.

AB - We present experimental results, theory, and simulations demonstrating two novel sources of coherent X-ray radiation generated in the relativistic laser (>10 18W/cm 2) interaction with easily accessible, repetitive, and debris-free gas jet targets. The first source is based on a relativistic mirror reflecting a counter-propagating laser pulse. A strongly nonlinear breaking wake wave driven by an intense laser pulse can act as a semi-transparent relativistic flying mirror. Such a mirror directly converts counter-propagating laser light into a high-frequency (XUV or X-ray) ultrashort pulse due to the double Doppler effect. In the experimental demonstration with the 9 TW J-KAREN laser, the flying mirror generated in a He gas jet partially reflected a 1 TW pulse, providing up to ∼1010 photons, 60 nJ (∼1012 photons/sr) in the XUV range (12.8-22 nm). The second source is demonstrated with the laser power ranging from 9 to 170 TW in experiments with the J-KAREN and Astra Gemini lasers. The odd and even order harmonics generated by linearly as well as circularly polarized pulses are emitted forward out of the gas jet. The 120 TW laser pulses produce harmonics with ∼3×10 13 photons/sr (∼600 μJ/sr) in the 120±5 eV spectral range. The observed harmonics cannot be explained by previously known mechanisms (atomic harmonics, betatron radiation, nonlinear Thomson scattering, etc.). We introduce a novel mechanism of harmonic generation based on the relativistic laser-plasma phenomena (self-focusing, cavity evacuation, bow wave generation), mathematical catastrophe theory which explains the formation of structurally stable electron density singularities, spikes, and collective radiation of a compact charge driven by a relativistic laser.

KW - catastrophe theory

KW - coherent X-rays

KW - double doppler effect

KW - electron spikes

KW - high-order harmonics

KW - particle-in-cell simulation

KW - relativistic flying mirror

KW - relativistic laser plasma

UR - http://www.scopus.com/inward/record.url?scp=84855249239&partnerID=8YFLogxK

UR - https://www.spiedigitallibrary.org/conference-proceedings-of-spie/8140.toc#FrontMatter

U2 - 10.1117/12.892898

DO - 10.1117/12.892898

M3 - Conference contribution book

AN - SCOPUS:84855249239

SN - 9780819487506

VL - 8140

BT - X-Ray Lasers and Coherent X-Ray Sources

A2 - Dunn, James

A2 - Klisnick, Annie

CY - Bellingham, WA

T2 - X-Ray Lasers and Coherent X-Ray Sources: Development and Applications IX

Y2 - 23 August 2011 through 25 August 2011

ER -

Coherent X-ray generation in relativistic laser - Gas jet interactions

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