Acceleration of collimated 45 MeV protons by collisionless shocks driven in low-density, large-scale gradient plasmas by a 1020 W/cm2, 1 µm laser

Antici, P.; Boella, E.; Chen, S. N.; Andrews, D. S.; Barberio, M.; Böker, J.; Cardelli, F.; Feugeas, J. L.; Glesser, M.; Nicolaï, P.; Romagnani, L.; Scisciò, M.; Starodubtsev, M.; Willi, O.; Kieffer, J. C.; Tikhonchuk, V.; Pépin, H.; Silva, L. O.; Humières, E. d’; Fuchs, J.

doi:10.1038/s41598-017-15449-8

Title: Acceleration of collimated 45 MeV protons by collisionless shocks driven in low-density, large-scale gradient plasmas by a 10²⁰ W/cm², 1 µm laser

Journal Article · Tue Nov 28 00:00:00 EST 2017 · Scientific Reports

DOI:https://doi.org/10.1038/s41598-017-15449-8· OSTI ID:1624361

Antici, P. ^[1]; Boella, E. ^[2]; Chen, S. N. ^[3]; Andrews, D. S. ^[4]; Barberio, M. ^[1]; Böker, J. ^[5]; Cardelli, F. ^[6]; Feugeas, J. L. ^[7]; Glesser, M. ^[8]; Nicolaï, P. ^[7]; Romagnani, L. ^[9]; Scisciò, M. ^[6]; Starodubtsev, M. ^[10]; Willi, O. ^[5]; Kieffer, J. C. ^[1];

^[10]; Pépin, H. ^[1]; Silva, L. O. ^[2]; Humières, E. d’ ^[7];

^[11]

INRS-EMT, Varennes, Quebec (Canada)
Univ. de Lisboa (Portugal). Inst. Superior Técnico. GoLP/Inst. de Plasmas e Fusão Nuclear
Sorbonne Univ., Palasieu Cedex (France). Univ. Paris-Saclay. Centre National de la Recherche Scientifique (CNRS). Ecole Polytechnique (CEA); Inst. of Applied Physics, Nizhny Novgorod (Russia)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Heinrich-Heine Univ., Dusseldorf (Germany). Inst. fur Laser - und Plasmaphysik
INRS-EMT, Varennes, Quebec (Canada); Univ. di Roma (Italy). Istituto Nazionale di Astrofisica (INAF) and Dept. SBAI
Univ. Bordeaux (France). CELIA, Talence
INRS-EMT, Varennes, Quebec (Canada); Sorbonne Univ., Palasieu Cedex (France). Univ. Paris-Saclay. Centre National de la Recherche Scientifique (CNRS). Ecole Polytechnique (CEA)
Sorbonne Univ., Palasieu Cedex (France). Univ. Paris-Saclay. Centre National de la Recherche Scientifique (CNRS). Ecole Polytechnique (CEA)
Inst. of Applied Physics, Nizhny Novgorod (Russia)
Sorbonne Univ., Palasieu Cedex (France). Univ. Paris-Saclay. Centre National de la Recherche Scientifique (CNRS). Ecole Polytechnique (CEA); Inst. of Applied Physics, Nizhny Novgorod (Russia);

A new type of proton acceleration stemming from large-scale gradients, low-density targets, irradiated by an intense near-infrared laser is observed. The produced protons are characterized by high-energies (with a broad spectrum), are emitted in a very directional manner, and the process is associated to relaxed laser (no need for high-contrast) and target (no need for ultra-thin or expensive targets) constraints. As such, this process appears quite efective compared to the standard and commonly used Target Normal Sheath Acceleration technique (TNSA), or more exploratory mechanisms like Radiation Pressure Acceleration (RPA). The data are underpinned by 3D numerical simulations which suggest that in these conditions a Low Density Collisionless Shock Acceleration (LDCSA) mechanism is at play, which combines an initial Collisionless Shock Acceleration (CSA) to a boost procured by a TNSA-like sheath feld in the downward density ramp of the target, leading to an overall broad spectrum. Experiments performed at a laser intensity of 10²⁰W/cm² show that LDCSA can accelerate, from ~1% critical density, mm-scale targets, up to 5×109 protons/MeV/sr/J with energies up to 45(±5) MeV in a collimated (~6° half-angle) manner.

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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC); Agence Nationale de la Recherche (ANR); Natural Sciences and Engineering Research Council of Canada (NSERC); European Research Council (ERC); German Research Foundation (DFG)

Grant/Contract Number:: AC52-07NA27344; 11-IDEX-0004-02; ANR-17-CE30-0026; 654148; 14.Z50.31.0007; 174726; 2016-PR-189974; 435416; 267841; GRK 1203; SFB/TR18

OSTI ID:: 1624361

Alternate ID(s):: OSTI ID: 1829969

Report Number(s):: LLNL-JRNL-820004; PII: 15449; TRN: US2200086

Journal Information:: Scientific Reports, Vol. 7, Issue 1; ISSN 2045-2322

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

Citation Metrics:

Cited by: 17 works

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Numerical modeling of laser-driven ion acceleration from near-critical gas targets Tatomirescu, Dragos; Vizman, Daniel; d’Humières, Emmanuel Plasma Physics and Controlled Fusion, Vol. 60, Issue 6 https://doi.org/10.1088/1361-6587/aaba44	journal	April 2018
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Ion acceleration in electrostatic collisionless shock: on the optimal density profile for quasi-monoenergetic beams Boella, E.; Fiúza, F.; Novo, A. Stockem arXiv https://doi.org/10.48550/arxiv.1709.04098	text	January 2017
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Title: Acceleration of collimated 45 MeV protons by collisionless shocks driven in low-density, large-scale gradient plasmas by a 10²⁰ W/cm², 1 µm laser