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Title: Astrophysical particle acceleration mechanisms in colliding magnetized laser-produced plasmas

Authors:
ORCiD logo [1];  [2]; ORCiD logo [2];  [3];  [2];  [4]
  1. Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
  2. Department of Astrophysical Sciences, Princeton University, Princeton, New Jersey 08544, USA
  3. Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109, USA
  4. Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA, Department of Astrophysical Sciences, Princeton University, Princeton, New Jersey 08544, USA
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1374778
Grant/Contract Number:
NA0002273; SC0008655; SC0016249
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 24; Journal Issue: 9; Related Information: CHORUS Timestamp: 2018-02-14 15:12:20; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics
Country of Publication:
United States
Language:
English

Citation Formats

Fox, W., Park, J., Deng, W., Fiksel, G., Spitkovsky, A., and Bhattacharjee, A.. Astrophysical particle acceleration mechanisms in colliding magnetized laser-produced plasmas. United States: N. p., 2017. Web. doi:10.1063/1.4993204.
Fox, W., Park, J., Deng, W., Fiksel, G., Spitkovsky, A., & Bhattacharjee, A.. Astrophysical particle acceleration mechanisms in colliding magnetized laser-produced plasmas. United States. doi:10.1063/1.4993204.
Fox, W., Park, J., Deng, W., Fiksel, G., Spitkovsky, A., and Bhattacharjee, A.. 2017. "Astrophysical particle acceleration mechanisms in colliding magnetized laser-produced plasmas". United States. doi:10.1063/1.4993204.
@article{osti_1374778,
title = {Astrophysical particle acceleration mechanisms in colliding magnetized laser-produced plasmas},
author = {Fox, W. and Park, J. and Deng, W. and Fiksel, G. and Spitkovsky, A. and Bhattacharjee, A.},
abstractNote = {},
doi = {10.1063/1.4993204},
journal = {Physics of Plasmas},
number = 9,
volume = 24,
place = {United States},
year = 2017,
month = 9
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on August 11, 2018
Publisher's Accepted Manuscript

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  • Spectral measurements have been made of charged fusion products produced in deuterium + helium-3 filled targets irradiated by the OMEGA laser system [T. R. Boehly , Opt. Commun. 133, 495 (1997)]. Comparing the energy shifts of four particle types has allowed two distinct physical processes to be probed: Electrostatic acceleration in the low-density corona and energy loss in the high-density target. When the fusion burn occurred during the laser pulse, particle energy shifts were dominated by acceleration effects. Using a simple model for the accelerating field region, the time history of the target electrostatic potential was found and shown tomore » decay to zero soon after laser irradiation was complete. When the fusion burn occurred after the pulse, particle energy shifts were dominated by energy losses in the target, allowing fundamental charged-particle stopping-power predictions to be tested. The results provide the first experimental verification of the general form of stopping power theories over a wide velocity range.« less
  • Colliding plasmas produced by neodymium-doped yttrium aluminium garnet (Nd:YAG) laser illumination of tin wedge targets form stagnation layers, the physical parameters of which can be controlled to optimise coupling with a carbon dioxide (CO{sub 2}) heating laser pulse and subsequent extreme ultraviolet (EUV) production. The conversion efficiency (CE) of total laser energy into EUV emission at 13.5 nm ± 1% was 3.6%. Neglecting both the energy required to form the stagnation layer and the EUV light produced before the CO{sub 2} laser pulse is incident results in a CE of 5.1% of the CO{sub 2} laser energy into EUV light.
  • An injector and accelerator is analyzed that uses three collinear laser pulses in a plasma an intense pump pulse, which generates a large wakefield ({ge}15GV/m), and two counterpropagating injection pulses. When the injection pulses collide, a slow phase velocity ponderomotive wave is generated that injects electrons into the fast wakefield for acceleration. For injection pulse intensities of 5{times}10{sup 16}W/cm{sup 2} and wakefield amplitudes of {delta}n/n{approx_equal}0.6, the production of ultrashort ({le}20fs) relativistic electron bunches with energy spreads {le}20{percent} and densities {ge}10{sup 17}cm{sup {minus}3} appears possible. {copyright} {ital 1997 American Institute of Physics.}