Ion acceleration with few cycle relativistic laser pulses from foil targets
Ion acceleration resulting from the interaction of 11 fs laser pulses of ~35 mJ energy with ultrahigh contrast (
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| creator | Ter-Avetisyan, Sargis Varmazyar, Parvin Singh, Prashant K Joon-Gon Son Fule, Miklos Valery Yu Bychenkov Farkas, Balazs Nelissen, Kwinten Mondal, Sudipta Papp, Daniel Borzsonyi, Adam Csontos, Janos Lecz, Zsolt Somoskoi, Tamas Toth, Laszlo Toth, Szabolcs Velyhan Andriy Margarone, Daniele Necas, Ales Tajima, Toshiki Mourou, Gerard Szabo, Gabor Osvay, Karoly |
| description | Ion acceleration resulting from the interaction of 11 fs laser pulses of ~35 mJ energy with ultrahigh contrast ( |
| doi_str_mv | 10.48550/arxiv.2212.00817 |
| format | Article |
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The maximum energy of the protons accelerated from both the rear and front sides of the target was above 1 MeV. A conversion efficiency from laser pulse energy to proton beam is estimated to be as high as ~1.4 % at 45-degree laser incidence using a 51 nm-thick Al target. The excellent laser contrast indicates the predominance of vacuum heating via the Brunels effect as an absorption mechanism involving a tiny pre-plasma of natural origin due to the Gaussian temporal laser pulse shape. Experimental results are in reasonable agreement with theoretical estimates where proton acceleration from the target rear into the forward direction is well explained by a TNSA-like mechanism, while proton acceleration from the target front into the backward direction can be explained by the formation of a charged cavity in a tiny pre-plasma. The exploding Coulomb field from the charged cavity also serves as a source for forward-accelerated ions at thick targets.</description><identifier>EISSN: 2331-8422</identifier><identifier>DOI: 10.48550/arxiv.2212.00817</identifier><language>eng</language><publisher>Ithaca: Cornell University Library, arXiv.org</publisher><subject>Foils ; Laser beam heating ; Lasers ; Physics - Plasma Physics ; Proton beams ; Pulse shape</subject><ispartof>arXiv.org, 2022-12</ispartof><rights>2022. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). 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The maximum energy of the protons accelerated from both the rear and front sides of the target was above 1 MeV. A conversion efficiency from laser pulse energy to proton beam is estimated to be as high as ~1.4 % at 45-degree laser incidence using a 51 nm-thick Al target. The excellent laser contrast indicates the predominance of vacuum heating via the Brunels effect as an absorption mechanism involving a tiny pre-plasma of natural origin due to the Gaussian temporal laser pulse shape. Experimental results are in reasonable agreement with theoretical estimates where proton acceleration from the target rear into the forward direction is well explained by a TNSA-like mechanism, while proton acceleration from the target front into the backward direction can be explained by the formation of a charged cavity in a tiny pre-plasma. 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The maximum energy of the protons accelerated from both the rear and front sides of the target was above 1 MeV. A conversion efficiency from laser pulse energy to proton beam is estimated to be as high as ~1.4 % at 45-degree laser incidence using a 51 nm-thick Al target. The excellent laser contrast indicates the predominance of vacuum heating via the Brunels effect as an absorption mechanism involving a tiny pre-plasma of natural origin due to the Gaussian temporal laser pulse shape. Experimental results are in reasonable agreement with theoretical estimates where proton acceleration from the target rear into the forward direction is well explained by a TNSA-like mechanism, while proton acceleration from the target front into the backward direction can be explained by the formation of a charged cavity in a tiny pre-plasma. The exploding Coulomb field from the charged cavity also serves as a source for forward-accelerated ions at thick targets.</abstract><cop>Ithaca</cop><pub>Cornell University Library, arXiv.org</pub><doi>10.48550/arxiv.2212.00817</doi><oa>free_for_read</oa></addata></record> |
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| subjects | Foils Laser beam heating Lasers Physics - Plasma Physics Proton beams Pulse shape |
| title | Ion acceleration with few cycle relativistic laser pulses from foil targets |
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