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Pfaff Y, Barbiero G, Rampp M, Klingebiel S, Brons J, Teisset CY, Wang H, Jung R, Jaksic J, Woldegeorgis AH, Trunk M, Maier AR, Saraceno CJ, Metzger T. Nonlinear pulse compression of a 200 mJ and 1 kW ultrafast thin-disk amplifier. OPTICS EXPRESS 2023; 31:22740-22756. [PMID: 37475378 DOI: 10.1364/oe.494359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 06/06/2023] [Indexed: 07/22/2023]
Abstract
We present a high-energy laser source consisting of an ultrafast thin-disk amplifier followed by a nonlinear compression stage. At a repetition rate of 5 kHz, the drive laser provides a pulse energy of up to 200 mJ with a pulse duration below 500 fs. Nonlinear broadening is implemented inside a Herriott-type multipass cell purged with noble gas, allowing us to operate under different seeding conditions. Firstly, the nonlinear broadening of 64 mJ pulses is demonstrated in an argon-filled cell, showing a compressibility down to 32 fs. Finally, we employ helium as a nonlinear medium to increase the energy up to 200 mJ while maintaining compressibility below 50 fs. Such high-energy pulses with sub-50 fs duration hold great promise as drivers of secondary sources.
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Azamoum Y, Tcheremiskine V, Clady R, Ferré A, Charmasson L, Utéza O, Sentis M. Impact of the pulse contrast ratio on molybdenum K α generation by ultrahigh intensity femtosecond laser solid interaction. Sci Rep 2018; 8:4119. [PMID: 29515179 PMCID: PMC5841281 DOI: 10.1038/s41598-018-22487-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Accepted: 02/23/2018] [Indexed: 11/15/2022] Open
Abstract
We present an extended experimental study of the absolute yield of Kα x-ray source (17.48 keV) produced by interaction of an ultrahigh intensity femtosecond laser with solid Mo target for temporal contrast ratios in the range of 1.7 × 107-3.3 × 109 and on three decades of intensity 1016-1019 W/cm². We demonstrate that for intensity I ≥ 2 × 1018 W/cm² Kα x-ray emission is independent of the value of contrast ratio. In addition, no saturation of the Kα photon number is measured and a value of ~2 × 1010 photons/sr/s is obtained at 10 Hz and I ~1019 W/cm². Furthermore, Kα energy conversion efficiency reaches the same high plateau equal to ~2 × 10-4 at I = 1019 W/cm² for all the studied contrast ratios. This original result suggests that relativistic J × B heating becomes dominant in these operating conditions which is supposed to be insensitive to the electron density gradient scale length L/λ. Finally, an additional experimental study performed by changing the angle of incidence of the laser beam onto the solid target highlights a clear signature of the interplay between collisionless absorption mechanisms depending on the contrast ratio and intensity.
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Affiliation(s)
- Y Azamoum
- Aix Marseille Université, CNRS, LP3 UMR 7341, 13288, Marseille, France.
| | - V Tcheremiskine
- Aix Marseille Université, CNRS, LP3 UMR 7341, 13288, Marseille, France
| | - R Clady
- Aix Marseille Université, CNRS, LP3 UMR 7341, 13288, Marseille, France
| | - A Ferré
- Aix Marseille Université, CNRS, LP3 UMR 7341, 13288, Marseille, France
| | - L Charmasson
- Aix Marseille Université, CNRS, LP3 UMR 7341, 13288, Marseille, France
| | - O Utéza
- Aix Marseille Université, CNRS, LP3 UMR 7341, 13288, Marseille, France
| | - M Sentis
- Aix Marseille Université, CNRS, LP3 UMR 7341, 13288, Marseille, France
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Ceccotti T, Floquet V, Sgattoni A, Bigongiari A, Klimo O, Raynaud M, Riconda C, Heron A, Baffigi F, Labate L, Gizzi LA, Vassura L, Fuchs J, Passoni M, Květon M, Novotny F, Possolt M, Prokůpek J, Proška J, Pšikal J, Štolcová L, Velyhan A, Bougeard M, D'Oliveira P, Tcherbakoff O, Réau F, Martin P, Macchi A. Evidence of resonant surface-wave excitation in the relativistic regime through measurements of proton acceleration from grating targets. PHYSICAL REVIEW LETTERS 2013; 111:185001. [PMID: 24237527 DOI: 10.1103/physrevlett.111.185001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2013] [Indexed: 06/02/2023]
Abstract
The interaction of laser pulses with thin grating targets, having a periodic groove at the irradiated surface, is experimentally investigated. Ultrahigh contrast (~10(12)) pulses allow us to demonstrate an enhanced laser-target coupling for the first time in the relativistic regime of ultrahigh intensity >10(19) W/cm(2). A maximum increase by a factor of 2.5 of the cutoff energy of protons produced by target normal sheath acceleration is observed with respect to plane targets, around the incidence angle expected for the resonant excitation of surface waves. A significant enhancement is also observed for small angles of incidence, out of resonance.
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Affiliation(s)
- T Ceccotti
- CEA/IRAMIS/SPAM, F-91191 Gif-sur-Yvette, France
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Zhang Z, Nishimura H, Nishikino M, Sunahara A, Johzaki T, Cai H, Kawachi T, Pirozhkov A, Sagisaka A, Orimo S, Ogura K, Yogo A, Okano Y, Ohshima S, Fujioka S, Kiriyama H, Kondo K, Shimomura T, Kanazawa S. Efficient multi-keV X-ray generation from high-contrast laser plasma interaction. EPJ WEB OF CONFERENCES 2013. [DOI: 10.1051/epjconf/20135918003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Nishimura H, Zhang Z, Namimoto T, Fujioka S, Koga M, Shiraga H, Ozaki T, Iwawaki T, Morioka T, Morita K, Habara H, Tanaka K, Nishikino M, Kawachi T, Sagisaka A, Orimo S, Pirozhkov A, Ogura K, Yogo A, Kiriyama H, Kondo K, Shimomura T, Kanazawa S, Okano Y, Azechi H. Absolute Kα line spectroscopy for cone-guided fast-ignition targets. EPJ WEB OF CONFERENCES 2013. [DOI: 10.1051/epjconf/20135913008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Zhang Z, Nishimura H, Namimoto T, Fujioka S, Arikawa Y, Nishikino M, Kawachi T, Sagisaka A, Hosoda H, Orimo S, Ogura K, Pirozhkov A, Yogo A, Okano Y, Kiriyama H, Kondo K, Ohshima S, Azechi H. Quantitative measurement of hard x-ray spectra for high intensity laser produced plasma. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2012; 83:053502. [PMID: 22667617 DOI: 10.1063/1.4717677] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
X-ray line spectra ranging from 17 to 77 keV were quantitatively measured with a Laue spectrometer, composed of a cylindrically curved crystal and a detector. Either a visible CCD detector coupled with a CsI phosphor screen or an imaging plate can be chosen, depending on the signal intensities and exposure times. The absolute sensitivity of the spectrometer system was calibrated using pre-characterized laser-produced x-ray sources and radioisotopes. The integrated reflectivity for the crystal is in good agreement with predictions by an open code for x-ray diffraction. The energy transfer efficiency from incident laser beams to hot electrons, as the energy transfer agency for specific x-ray line emissions, is derived as a consequence of this work.
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Affiliation(s)
- Z Zhang
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan.
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