Large Spectral Shift of Reflected Radiation From Laser Plasmas Generated by High Contrast KrF Laser Pulses
Increasing absorption up to more than 90% with increasing intensity was observed in boron and gold laser plasmas heated by KrF laser pulses of high, but still non-relativistic, intensity. The pulses of 700 fs duration had a temporal contrast of 12 orders of magnitude; thus, the laser pulse of more t...
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Frontiers Media S.A.
2020-09-01
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| Series: | Frontiers in Physics |
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| Online Access: | https://www.frontiersin.org/article/10.3389/fphy.2020.00321/full |
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doaj-800fa0de38e74ff7adda9dd36a4cca762020-11-25T03:24:34ZengFrontiers Media S.A.Frontiers in Physics2296-424X2020-09-01810.3389/fphy.2020.00321549539Large Spectral Shift of Reflected Radiation From Laser Plasmas Generated by High Contrast KrF Laser PulsesZsolt Kovács0Zsolt Kovács1Barnabás Gilicze2Barnabás Gilicze3Sándor Szatmári4Sándor Szatmári5István B. Földes6Department of Experimental Physics, University of Szeged, Szeged, HungaryDepartment of High Energy Experimental Particle and Heavy Ion Physics, Institute for Particle and Nuclear Physics, Wigner Research Centre for Physics, Budapest, HungaryDepartment of Experimental Physics, University of Szeged, Szeged, HungaryDepartment of Photonics and Laser Research Interdisciplinary Excellence Centre, University of Szeged, Szeged, HungaryDepartment of Experimental Physics, University of Szeged, Szeged, HungaryDepartment of Photonics and Laser Research Interdisciplinary Excellence Centre, University of Szeged, Szeged, HungaryDepartment of High Energy Experimental Particle and Heavy Ion Physics, Institute for Particle and Nuclear Physics, Wigner Research Centre for Physics, Budapest, HungaryIncreasing absorption up to more than 90% with increasing intensity was observed in boron and gold laser plasmas heated by KrF laser pulses of high, but still non-relativistic, intensity. The pulses of 700 fs duration had a temporal contrast of 12 orders of magnitude; thus, the laser pulse of more than 1018 Wcm−2 intensity hit the steep surface of the boron and gold targets. Blue shift of the reflected radiation refers to extreme high acceleration resulting in velocities above 5 × 105 ms−1. Brunel absorption and ponderomotive effects are shown to play an important role in the observed phenomena.https://www.frontiersin.org/article/10.3389/fphy.2020.00321/fulllaser plasmasubpicosecondreflectivityponderomotive forcevacuum heating |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
Zsolt Kovács Zsolt Kovács Barnabás Gilicze Barnabás Gilicze Sándor Szatmári Sándor Szatmári István B. Földes |
| spellingShingle |
Zsolt Kovács Zsolt Kovács Barnabás Gilicze Barnabás Gilicze Sándor Szatmári Sándor Szatmári István B. Földes Large Spectral Shift of Reflected Radiation From Laser Plasmas Generated by High Contrast KrF Laser Pulses Frontiers in Physics laser plasma subpicosecond reflectivity ponderomotive force vacuum heating |
| author_facet |
Zsolt Kovács Zsolt Kovács Barnabás Gilicze Barnabás Gilicze Sándor Szatmári Sándor Szatmári István B. Földes |
| author_sort |
Zsolt Kovács |
| title |
Large Spectral Shift of Reflected Radiation From Laser Plasmas Generated by High Contrast KrF Laser Pulses |
| title_short |
Large Spectral Shift of Reflected Radiation From Laser Plasmas Generated by High Contrast KrF Laser Pulses |
| title_full |
Large Spectral Shift of Reflected Radiation From Laser Plasmas Generated by High Contrast KrF Laser Pulses |
| title_fullStr |
Large Spectral Shift of Reflected Radiation From Laser Plasmas Generated by High Contrast KrF Laser Pulses |
| title_full_unstemmed |
Large Spectral Shift of Reflected Radiation From Laser Plasmas Generated by High Contrast KrF Laser Pulses |
| title_sort |
large spectral shift of reflected radiation from laser plasmas generated by high contrast krf laser pulses |
| publisher |
Frontiers Media S.A. |
| series |
Frontiers in Physics |
| issn |
2296-424X |
| publishDate |
2020-09-01 |
| description |
Increasing absorption up to more than 90% with increasing intensity was observed in boron and gold laser plasmas heated by KrF laser pulses of high, but still non-relativistic, intensity. The pulses of 700 fs duration had a temporal contrast of 12 orders of magnitude; thus, the laser pulse of more than 1018 Wcm−2 intensity hit the steep surface of the boron and gold targets. Blue shift of the reflected radiation refers to extreme high acceleration resulting in velocities above 5 × 105 ms−1. Brunel absorption and ponderomotive effects are shown to play an important role in the observed phenomena. |
| topic |
laser plasma subpicosecond reflectivity ponderomotive force vacuum heating |
| url |
https://www.frontiersin.org/article/10.3389/fphy.2020.00321/full |
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