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Title: Collisionless shock acceleration of narrow energy spread ion beams from mixed species plasmas using 1     μ m lasers

Abstract

Collisionless shock acceleration of protons and C6+ ions has been achieved by the interaction of a 1020 W/cm2, 1 μm laser with a near-critical density plasma. Ablation of the initially solid density target by a secondary laser allows for systematic control of the plasma profile. This enables the production of beams with peaked spectra with energies of 10 – 18 MeV/amu and energy spreads of 10%–20% with up to 3 × 109 particles within these narrow spectral features. The narrow energy spread and similar velocity of ion species with different charge-to-mass ratios are consistent with acceleration by the moving potential of a shock wave. Particle-in-cell simulations show shock accelerated beams of protons and C6+ ions with energy distributions consistent with the experiments. In conclusion, simulations further indicate the plasma profile determines the trade-off between the beam charge and energy and that with additional target optimization narrow energy spread beams exceeding 100 MeV/amu can be produced using the same laser conditions.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Univ. of California, Los Angeles, CA (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES); USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF); Natural Sciences and Engineering Research Council of Canada (NSERC)
OSTI Identifier:
1479144
Alternate Identifier(s):
OSTI ID: 1490380; OSTI ID: 1525470; OSTI ID: 1772299; OSTI ID: 1835897
Report Number(s):
LLNL-JRNL-738085
Journal ID: ISSN 2469-9888; PRABCJ; 103401
Grant/Contract Number:  
AC52-07NA27344; AC02-76SF00515; SC0010064; NA0001944; 15-LW-095; FWP 100237; FWP 100182; FWP 100331; SCW1575-1; NA0002950; NA0003873; 1734315; RGPIN-2014-05736
Resource Type:
Published Article
Journal Name:
Physical Review Accelerators and Beams
Additional Journal Information:
Journal Name: Physical Review Accelerators and Beams Journal Volume: 21 Journal Issue: 10; Journal ID: ISSN 2469-9888
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; collisionless shock in plasma; high intensity laser-plasma interactions; laser driven ion acceleration

Citation Formats

Pak, A., Kerr, S., Lemos, N., Link, A., Patel, P., Albert, F., Divol, L., Pollock, B. B., Haberberger, D., Froula, D., Gauthier, M., Glenzer, S. H., Longman, A., Manzoor, L., Fedosejevs, R., Tochitsky, S., Joshi, C., and Fiuza, F. Collisionless shock acceleration of narrow energy spread ion beams from mixed species plasmas using 1     μ m lasers. United States: N. p., 2018. Web. doi:10.1103/PhysRevAccelBeams.21.103401.
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Pak, A., Kerr, S., Lemos, N., Link, A., Patel, P., Albert, F., Divol, L., Pollock, B. B., Haberberger, D., Froula, D., Gauthier, M., Glenzer, S. H., Longman, A., Manzoor, L., Fedosejevs, R., Tochitsky, S., Joshi, C., & Fiuza, F. Collisionless shock acceleration of narrow energy spread ion beams from mixed species plasmas using 1     μ m lasers. United States. https://doi.org/10.1103/PhysRevAccelBeams.21.103401
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Pak, A., Kerr, S., Lemos, N., Link, A., Patel, P., Albert, F., Divol, L., Pollock, B. B., Haberberger, D., Froula, D., Gauthier, M., Glenzer, S. H., Longman, A., Manzoor, L., Fedosejevs, R., Tochitsky, S., Joshi, C., and Fiuza, F. Thu . "Collisionless shock acceleration of narrow energy spread ion beams from mixed species plasmas using 1     μ m lasers". United States. https://doi.org/10.1103/PhysRevAccelBeams.21.103401.
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@article{osti_1479144,
title = {Collisionless shock acceleration of narrow energy spread ion beams from mixed species plasmas using 1     μ m lasers},
author = {Pak, A. and Kerr, S. and Lemos, N. and Link, A. and Patel, P. and Albert, F. and Divol, L. and Pollock, B. B. and Haberberger, D. and Froula, D. and Gauthier, M. and Glenzer, S. H. and Longman, A. and Manzoor, L. and Fedosejevs, R. and Tochitsky, S. and Joshi, C. and Fiuza, F.},
abstractNote = {Collisionless shock acceleration of protons and C6+ ions has been achieved by the interaction of a 1020 W/cm2, 1 μm laser with a near-critical density plasma. Ablation of the initially solid density target by a secondary laser allows for systematic control of the plasma profile. This enables the production of beams with peaked spectra with energies of 10 – 18 MeV/amu and energy spreads of 10%–20% with up to 3 × 109 particles within these narrow spectral features. The narrow energy spread and similar velocity of ion species with different charge-to-mass ratios are consistent with acceleration by the moving potential of a shock wave. Particle-in-cell simulations show shock accelerated beams of protons and C6+ ions with energy distributions consistent with the experiments. In conclusion, simulations further indicate the plasma profile determines the trade-off between the beam charge and energy and that with additional target optimization narrow energy spread beams exceeding 100 MeV/amu can be produced using the same laser conditions.},
doi = {10.1103/PhysRevAccelBeams.21.103401},
journal = {Physical Review Accelerators and Beams},
number = 10,
volume = 21,
place = {United States},
year = {Thu Oct 25 00:00:00 EDT 2018},
month = {Thu Oct 25 00:00:00 EDT 2018}
}
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Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1103/PhysRevAccelBeams.21.103401
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Citation Metrics:
Cited by: 25 works
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Figures / Tables:

FIG. 1 FIG. 1: (Color online) a)Experimental setup. A near-critical density target is created by first irradiating a Mylar foil with an ablation laser. After the target has expanded for a time $\tau$ , a high-intensity ps duration laser pulse is focused onto the target to produce the electrostatic shock wave. Acceleratedmore » ions are measured by the imaging magnetic spectrometer (IMS) and Thomson parabola (TP). TP measurements indicate the majority of accelerated ions are C6+/O8+. Accelerated electrons are measured by a permanent magnet electron spectrometer. Radiochromic film (RCF) was used to measure a portion of the spatial beam profile. Orthogonal to the target, a probe laser was used to measure the target expansion. Accelerated proton spectra shown for b) an unablated foil, and c-e) at different time delays from consecutive shots. The inferred peak ne of the target and laser a0 are also denoted. Only signal > 4× the background variation is shown.« less
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    Works referencing / citing this record:

    High-repetition-rate ( kHz) targets and optics from liquid microjets for high-intensity laser–plasma interactions
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