Olga N. Rosmej, Xiaofei Shen, Alexander Pukhov, Luca Antonelli, Francesco Barbato, Mikhail Gyrdymov, Marc M. Günther, Şêro Jakob Zähter, Vyacheslav S. Popov, Nataliya G. Borisenko, Nikolay E. Andreev
- Direct laser acceleration (DLA) of electrons in a plasma of near-critical electron density (NCD) and the associated synchrotron-like radiation are discussed for moderate relativistic laser intensity (normalized laser amplitude a0 ≤ 4.3) and ps length pulse. This regime is typical of kJ PW-class laser facilities designed for high-energy-density (HED) research. In experiments at the PHELIX facility, it has been demonstrated that interaction of a 1019 W/cm2 sub-ps laser pulse with a sub-mm length NCD plasma results in the generation of high-current well-directed super-ponderomotive electrons with an effective temperature ten times higher than the ponderomotive potential [Rosmej et al., Plasma Phys. Controlled Fusion 62, 115024 (2020)]. Three-dimensional particle-in-cell simulations provide good agreement with the measured electron energy distribution and are used in the current work to study synchrotron radiation from the DLA-accelerated electrons. The resulting x-ray spectrum with a critical energy of 5 keV reveals an ultrahigh photon number of 7 × 1011 in the 1–30 keV photon energy range at the focused laser energy of 20 J. Numerical simulations of betatron x-ray phase contrast imaging based on the DLA process for the parameters of a PHELIX laser are presented. The results are of interest for applications in HED experiments, which require a ps x-ray pulse and a high photon flux.
MetadatenAuthor: | Olga N. RosmejORCiD, Xiaofei ShenORCiDGND, Alexander PukhovORCiDGND, Luca AntonelliORCiD, Francesco BarbatoORCiDGND, Mikhail GyrdymovORCiDGND, Marc M. GüntherORCiDGND, Şêro Jakob ZähterORCiDGND, Vyacheslav S. Popov, Nataliya G. Borisenko, Nikolay E. AndreevORCiD |
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URN: | urn:nbn:de:hebis:30:3-628223 |
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DOI: | https://doi.org/10.1063/5.0042315 |
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ISSN: | 2468-080X |
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Parent Title (English): | Matter and radiation at extremes |
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Publisher: | AIP Publishing |
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Place of publication: | Melville, NY |
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Document Type: | Article |
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Language: | English |
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Date of Publication (online): | 2021/07/09 |
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Date of first Publication: | 2021/07/09 |
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Publishing Institution: | Universitätsbibliothek Johann Christian Senckenberg |
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Release Date: | 2023/03/24 |
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Tag: | Betatrons; Plasma acceleration; X-ray phase contrast imaging |
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Volume: | 6 |
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Issue: | 4, art. 048401 |
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Article Number: | 048401 |
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Page Number: | 8 |
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First Page: | 1 |
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Last Page: | 8 |
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Note: | This work was also supported by the DFG (Project No. PU 213/9), EPSRC Grant No. EP/P026796/1. |
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HeBIS-PPN: | 508919347 |
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Institutes: | Physik / Physik |
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Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
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Sammlungen: | Universitätspublikationen |
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Licence (German): | Creative Commons - Namensnennung 4.0 |
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