High order harmonics from relativistic electron spikes

Alexander Pirozhkov, Masaki Kando, Timur Esirkepov, Pablo Gallegos, Hamad Ahmed, Eugene Ragozin, Tatiana Pikuz, Tetsuya Kawachi, Akito Sagisaka, James Koga, Mireille Coury, J. Green, P.S. Foster, Ceri Mae Brenner, Dan Symes, Michiaki Mori, Keigo Kawase, Takashi Kameshima, Yuji Fukuda, Liming Chen & 17 others Izuru Daito, Koichi Ogura, Yukio Hayashi, Hideyuki Kotaki, Hiromitsu Kiriyama, Hajime Okada, Nobuyuki Nishimori, Takashi Imazono, Kiminori Kondo, Toshiki Tajima, Hiroyuki Daido, Rajeev Pattahil, Paul McKenna, Marco Borghesi, David Neely, Yoshiaki Kato, Sergei Bulanov

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

A new regime of relativistic high-order harmonic generation is discovered [Phys. Rev. Lett. 108, 135004 (2012)]. Multi-terawatt relativistic-irradiance (>1018 W/cm2) femtosecond (~30-50 fs) 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 by either 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 120 TW laser producing 40 μJ/sr per harmonic at 120 eV. The experimental results are explained using particle-in-cell (PIC) simulations and catastrophe theory. A new mechanism of harmonic generation by sharp, structurally stable, oscillating electron spikes at the joint of boundaries of 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 two-channel spectrograph, harmonic generation by circularly polarized laser pulses and angular distribution.
LanguageEnglish
Article number093003
Number of pages30
JournalNew Journal of Physics
Volume16
DOIs
Publication statusPublished - Sep 2014

Fingerprint

spikes
harmonics
harmonic generations
lasers
electrons
bow waves
pulses
catastrophe theory
gas jets
photons
irradiance
wakes
spectrographs
angular distribution
simulation
cells
water
energy

Keywords

  • relativistic laser plasma
  • high-order harmonics
  • elativistic electron spikes
  • gas jet target

Cite this

Pirozhkov, A., Kando, M., Esirkepov, T., Gallegos, P., Ahmed, H., Ragozin, E., ... Bulanov, S. (2014). High order harmonics from relativistic electron spikes. New Journal of Physics, 16, [093003]. https://doi.org/10.1088/1367-2630/16/9/093003
Pirozhkov, Alexander ; Kando, Masaki ; Esirkepov, Timur ; Gallegos, Pablo ; Ahmed, Hamad ; Ragozin, Eugene ; Pikuz, Tatiana ; Kawachi, Tetsuya ; Sagisaka, Akito ; Koga, James ; Coury, Mireille ; Green, J. ; Foster, P.S. ; Brenner, Ceri Mae ; Symes, Dan ; Mori, Michiaki ; Kawase, Keigo ; Kameshima, Takashi ; Fukuda, Yuji ; Chen, Liming ; Daito, Izuru ; Ogura, Koichi ; Hayashi, Yukio ; Kotaki, Hideyuki ; Kiriyama, Hiromitsu ; Okada, Hajime ; Nishimori, Nobuyuki ; Imazono, Takashi ; Kondo, Kiminori ; Tajima, Toshiki ; Daido, Hiroyuki ; Pattahil, Rajeev ; McKenna, Paul ; Borghesi, Marco ; Neely, David ; Kato, Yoshiaki ; Bulanov, Sergei. / High order harmonics from relativistic electron spikes. In: New Journal of Physics. 2014 ; Vol. 16.
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abstract = "A new regime of relativistic high-order harmonic generation is discovered [Phys. Rev. Lett. 108, 135004 (2012)]. Multi-terawatt relativistic-irradiance (>1018 W/cm2) femtosecond (~30-50 fs) 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 by either 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 120 TW laser producing 40 μJ/sr per harmonic at 120 eV. The experimental results are explained using particle-in-cell (PIC) simulations and catastrophe theory. A new mechanism of harmonic generation by sharp, structurally stable, oscillating electron spikes at the joint of boundaries of 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 two-channel spectrograph, harmonic generation by circularly polarized laser pulses and angular distribution.",
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Pirozhkov, A, Kando, M, Esirkepov, T, Gallegos, P, Ahmed, H, Ragozin, E, Pikuz, T, Kawachi, T, Sagisaka, A, Koga, J, Coury, M, Green, J, Foster, PS, Brenner, CM, Symes, D, 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, Tajima, T, Daido, H, Pattahil, R, McKenna, P, Borghesi, M, Neely, D, Kato, Y & Bulanov, S 2014, 'High order harmonics from relativistic electron spikes' New Journal of Physics, vol. 16, 093003. https://doi.org/10.1088/1367-2630/16/9/093003

High order harmonics from relativistic electron spikes. / Pirozhkov, Alexander; Kando, Masaki; Esirkepov, Timur; Gallegos, Pablo; Ahmed, Hamad; Ragozin, Eugene; Pikuz, Tatiana; Kawachi, Tetsuya; Sagisaka, Akito; Koga, James; Coury, Mireille; Green, J.; Foster, P.S.; Brenner, Ceri Mae; Symes, Dan; Mori, Michiaki; Kawase, Keigo; Kameshima, Takashi; Fukuda, Yuji; Chen, Liming; Daito, Izuru; Ogura, Koichi; Hayashi, Yukio; Kotaki, Hideyuki; Kiriyama, Hiromitsu; Okada, Hajime; Nishimori, Nobuyuki; Imazono, Takashi; Kondo, Kiminori; Tajima, Toshiki; Daido, Hiroyuki; Pattahil, Rajeev; McKenna, Paul; Borghesi, Marco; Neely, David; Kato, Yoshiaki; Bulanov, Sergei.

In: New Journal of Physics, Vol. 16, 093003, 09.2014.

Research output: Contribution to journalArticle

TY - JOUR

T1 - High order harmonics from relativistic electron spikes

AU - Pirozhkov, Alexander

AU - Kando, Masaki

AU - Esirkepov, Timur

AU - Gallegos, Pablo

AU - Ahmed, Hamad

AU - Ragozin, Eugene

AU - Pikuz, Tatiana

AU - Kawachi, Tetsuya

AU - Sagisaka, Akito

AU - Koga, James

AU - Coury, Mireille

AU - Green, J.

AU - Foster, P.S.

AU - Brenner, Ceri Mae

AU - Symes, Dan

AU - Mori, Michiaki

AU - Kawase, Keigo

AU - Kameshima, Takashi

AU - Fukuda, Yuji

AU - Chen, Liming

AU - Daito, Izuru

AU - Ogura, Koichi

AU - Hayashi, Yukio

AU - Kotaki, Hideyuki

AU - Kiriyama, Hiromitsu

AU - Okada, Hajime

AU - Nishimori, Nobuyuki

AU - Imazono, Takashi

AU - Kondo, Kiminori

AU - Tajima, Toshiki

AU - Daido, Hiroyuki

AU - Pattahil, Rajeev

AU - McKenna, Paul

AU - Borghesi, Marco

AU - Neely, David

AU - Kato, Yoshiaki

AU - Bulanov, Sergei

PY - 2014/9

Y1 - 2014/9

N2 - A new regime of relativistic high-order harmonic generation is discovered [Phys. Rev. Lett. 108, 135004 (2012)]. Multi-terawatt relativistic-irradiance (>1018 W/cm2) femtosecond (~30-50 fs) 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 by either 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 120 TW laser producing 40 μJ/sr per harmonic at 120 eV. The experimental results are explained using particle-in-cell (PIC) simulations and catastrophe theory. A new mechanism of harmonic generation by sharp, structurally stable, oscillating electron spikes at the joint of boundaries of 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 two-channel spectrograph, harmonic generation by circularly polarized laser pulses and angular distribution.

AB - A new regime of relativistic high-order harmonic generation is discovered [Phys. Rev. Lett. 108, 135004 (2012)]. Multi-terawatt relativistic-irradiance (>1018 W/cm2) femtosecond (~30-50 fs) 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 by either 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 120 TW laser producing 40 μJ/sr per harmonic at 120 eV. The experimental results are explained using particle-in-cell (PIC) simulations and catastrophe theory. A new mechanism of harmonic generation by sharp, structurally stable, oscillating electron spikes at the joint of boundaries of 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 two-channel spectrograph, harmonic generation by circularly polarized laser pulses and angular distribution.

KW - relativistic laser plasma

KW - high-order harmonics

KW - elativistic electron spikes

KW - gas jet target

UR - http://iopscience.iop.org/1367-2630/

U2 - 10.1088/1367-2630/16/9/093003

DO - 10.1088/1367-2630/16/9/093003

M3 - Article

VL - 16

JO - New Journal of Physics

T2 - New Journal of Physics

JF - New Journal of Physics

SN - 1367-2630

M1 - 093003

ER -

Pirozhkov A, Kando M, Esirkepov T, Gallegos P, Ahmed H, Ragozin E et al. High order harmonics from relativistic electron spikes. New Journal of Physics. 2014 Sep;16. 093003. https://doi.org/10.1088/1367-2630/16/9/093003