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Title: Spectral modification of shock accelerated ions using a hydrodynamically shaped gas target

Abstract

We report on reproducible shock acceleration from irradiation of a λ=10 μm CO2 laser on optically shaped H2 and He gas targets. A low energy laser prepulse (I≲1014 W cm–2) is used to drive a blast wave inside the gas target, creating a steepened, variable density gradient. This is followed, after 25 ns, by a high intensity laser pulse (I>1016 W cm–2) that produces an electrostatic collisionless shock. Upstream ions are accelerated for a narrow range of prepulse energies. For long density gradients (≳40 μm), broadband beams of He+ and H+ were routinely produced, whilst for shorter gradients (≲20 μm), quasimonoenergetic acceleration of protons is observed. These measurements indicate that the properties of the accelerating shock and the resultant ion energy distribution, in particular the production of narrow energy spread beams, is highly dependent on the plasma density profile. These findings are corroborated by 2D particle-in-cell simulations.

Authors:
 [1];  [1];  [2];  [3];  [3];  [2];  [2];  [1]
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  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Imperial College, London (United Kingdom)
  3. Stony Brook Univ., Stony Brook, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP)
OSTI Identifier:
1226060
Alternate Identifier(s):
OSTI ID: 1213279
Report Number(s):
BNL-108518-2015-JA
Journal ID: ISSN 0031-9007; PRLTAO; R&D Project: KBCH139; KB0202011
Grant/Contract Number:  
SC00112704; AC02-98CH10886; FG02-07ER41488; AC02-05CH11231; 12-032; mp1401
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 115; Journal Issue: 9; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; Accelerator Test Facility

Citation Formats

Tresca, O., Polyanskiy, M. N., Dover, N. P., Cook, N., Maharjan, C., Najmudin, Z., Shkolnikov, P., and Pogorelsky, I. Spectral modification of shock accelerated ions using a hydrodynamically shaped gas target. United States: N. p., 2015. Web. doi:10.1103/PhysRevLett.115.094802.
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Tresca, O., Polyanskiy, M. N., Dover, N. P., Cook, N., Maharjan, C., Najmudin, Z., Shkolnikov, P., & Pogorelsky, I. Spectral modification of shock accelerated ions using a hydrodynamically shaped gas target. United States. https://doi.org/10.1103/PhysRevLett.115.094802
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Tresca, O., Polyanskiy, M. N., Dover, N. P., Cook, N., Maharjan, C., Najmudin, Z., Shkolnikov, P., and Pogorelsky, I. Fri . "Spectral modification of shock accelerated ions using a hydrodynamically shaped gas target". United States. https://doi.org/10.1103/PhysRevLett.115.094802. https://www.osti.gov/servlets/purl/1226060.
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@article{osti_1226060,
title = {Spectral modification of shock accelerated ions using a hydrodynamically shaped gas target},
author = {Tresca, O. and Polyanskiy, M. N. and Dover, N. P. and Cook, N. and Maharjan, C. and Najmudin, Z. and Shkolnikov, P. and Pogorelsky, I.},
abstractNote = {We report on reproducible shock acceleration from irradiation of a λ=10 μm CO2 laser on optically shaped H2 and He gas targets. A low energy laser prepulse (I≲1014 W cm–2) is used to drive a blast wave inside the gas target, creating a steepened, variable density gradient. This is followed, after 25 ns, by a high intensity laser pulse (I>1016 W cm–2) that produces an electrostatic collisionless shock. Upstream ions are accelerated for a narrow range of prepulse energies. For long density gradients (≳40 μm), broadband beams of He+ and H+ were routinely produced, whilst for shorter gradients (≲20 μm), quasimonoenergetic acceleration of protons is observed. These measurements indicate that the properties of the accelerating shock and the resultant ion energy distribution, in particular the production of narrow energy spread beams, is highly dependent on the plasma density profile. These findings are corroborated by 2D particle-in-cell simulations.},
doi = {10.1103/PhysRevLett.115.094802},
journal = {Physical Review Letters},
number = 9,
volume = 115,
place = {United States},
year = {Fri Aug 28 00:00:00 EDT 2015},
month = {Fri Aug 28 00:00:00 EDT 2015}
}
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https://doi.org/10.1103/PhysRevLett.115.094802
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    Works referencing / citing this record:

    Intense attosecond pulses from laser-irradiated near-critical-density plasmas
    journal, January 2017

    Development of gas jet targets for laser-plasma experiments at near-critical density
    journal, June 2019

    • Henares, J. L.; Puyuelo-Valdes, P.; Hannachi, F.
    • Review of Scientific Instruments, Vol. 90, Issue 6
    • DOI: 10.1063/1.5093613

    Proton acceleration by collisionless shocks using a supersonic H 2 gas-jet target and high-power infrared laser pulses
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    • Puyuelo-Valdes, P.; Henares, J. L.; Hannachi, F.
    • Physics of Plasmas, Vol. 26, Issue 12
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    Optical shaping of gas targets for laser–plasma ion sources
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    Collisionless Shock Acceleration of High-Flux Quasimonoenergetic Proton Beams Driven by Circularly Polarized Laser Pulses
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    Ion acceleration in electrostatic collisionless shock: on the optimal density profile for quasi-monoenergetic beams
    journal, February 2018

    • Boella, E.; Fiúza, F.; Novo, A. Stockem
    • Plasma Physics and Controlled Fusion, Vol. 60, Issue 3
    • DOI: 10.1088/1361-6587/aaa556
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