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Title: First demonstration of ARC-accelerated proton beams at the National Ignition Facility

Abstract

New short-pulse kilojoule, Petawatt-class lasers, which have recently come online and are coupled to large-scale, many-beam long-pulse facilities, undoubtedly serve as very exciting tools to capture transformational science opportunities in high energy density physics. These short-pulse lasers also happen to reside in a unique laser regime: very high-energy (kilojoule), relatively long (multi-picosecond) pulse-lengths, and large (10s of micron) focal spots, where their use in driving energetic particle beams is largely unexplored. Proton acceleration via Target Normal Sheath Acceleration (TNSA) using the Advanced Radiographic Capability (ARC) short-pulse laser at the National Ignition Facility in the Lawrence Livermore National Laboratory is demonstrated for the first time, and protons of up to 18 MeV are measured using laser irradiation of >1 ps pulse-lengths and quasi-relativistic (10 18 W/cm 2) intensities. This is indicative of a super-ponderomotive electron acceleration mechanism that sustains acceleration over long (multi-picosecond) time-scales and allows for proton energies to be achieved far beyond what the well-established scalings of proton acceleration via TNSA would predict at these modest intensities. Furthermore, the characteristics of the ARC laser (large ~100 μm diameter focal spot, flat spatial profile, multi-picosecond, relatively low prepulse) provide acceleration conditions that allow for the investigation of 1D-like particle acceleration.more » A high flux ~50 J of laser-accelerated protons is experimentally demonstrated. In conclusion, a new capability in multi-picosecond particle-in-cell simulation is applied to model the data, corroborating the high proton energies and elucidating the physics of multi-picosecond particle acceleration.« less

Authors:
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  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Univ. of California at San Diego, La Jolla, CA (United States)
  3. General Atomics, La Jolla, CA (United States)
  4. Univ. of Oxford, Oxford (United Kingdom)
  5. Osaka Univ., Osaka (Japan)
  6. STFC Rutherford Appleton Lab, Didcot (United Kingdom)
  7. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1545360
Alternate Identifier(s):
OSTI ID: 1508680
Grant/Contract Number:  
AC52-07NA27344; 17-ERD-039
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 26; Journal Issue: 4; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS

Citation Formats

Mariscal, D., Ma, T., Wilks, S. C., Kemp, A. J., Williams, G. J., Michel, P., Chen, H., Patel, P. K., Remington, B. A., Bowers, M., Pelz, L., Hermann, M. R., Hsing, W., Martinez, D., Sigurdsson, R., Prantil, M., Conder, A., Lawson, J., Hamamoto, M., Di Nicola, P., Widmayer, C., Homoelle, D., Lowe-Webb, R., Herriot, S., Williams, W., Alessi, D., Kalantar, D., Zacharias, R., Haefner, C., Thompson, N., Zobrist, T., Lord, D., Hash, N., Pak, A., Lemos, N., Tabak, M., McGuffey, C., Kim, J., Beg, F. N., Wei, M. S., Norreys, P., Morace, A., Iwata, N., Sentoku, Y., Neely, D., Scott, G. G., and Flippo, K. First demonstration of ARC-accelerated proton beams at the National Ignition Facility. United States: N. p., 2019. Web. doi:10.1063/1.5085787.
Mariscal, D., Ma, T., Wilks, S. C., Kemp, A. J., Williams, G. J., Michel, P., Chen, H., Patel, P. K., Remington, B. A., Bowers, M., Pelz, L., Hermann, M. R., Hsing, W., Martinez, D., Sigurdsson, R., Prantil, M., Conder, A., Lawson, J., Hamamoto, M., Di Nicola, P., Widmayer, C., Homoelle, D., Lowe-Webb, R., Herriot, S., Williams, W., Alessi, D., Kalantar, D., Zacharias, R., Haefner, C., Thompson, N., Zobrist, T., Lord, D., Hash, N., Pak, A., Lemos, N., Tabak, M., McGuffey, C., Kim, J., Beg, F. N., Wei, M. S., Norreys, P., Morace, A., Iwata, N., Sentoku, Y., Neely, D., Scott, G. G., & Flippo, K. First demonstration of ARC-accelerated proton beams at the National Ignition Facility. United States. doi:10.1063/1.5085787.
Mariscal, D., Ma, T., Wilks, S. C., Kemp, A. J., Williams, G. J., Michel, P., Chen, H., Patel, P. K., Remington, B. A., Bowers, M., Pelz, L., Hermann, M. R., Hsing, W., Martinez, D., Sigurdsson, R., Prantil, M., Conder, A., Lawson, J., Hamamoto, M., Di Nicola, P., Widmayer, C., Homoelle, D., Lowe-Webb, R., Herriot, S., Williams, W., Alessi, D., Kalantar, D., Zacharias, R., Haefner, C., Thompson, N., Zobrist, T., Lord, D., Hash, N., Pak, A., Lemos, N., Tabak, M., McGuffey, C., Kim, J., Beg, F. N., Wei, M. S., Norreys, P., Morace, A., Iwata, N., Sentoku, Y., Neely, D., Scott, G. G., and Flippo, K. Wed . "First demonstration of ARC-accelerated proton beams at the National Ignition Facility". United States. doi:10.1063/1.5085787.
@article{osti_1545360,
title = {First demonstration of ARC-accelerated proton beams at the National Ignition Facility},
author = {Mariscal, D. and Ma, T. and Wilks, S. C. and Kemp, A. J. and Williams, G. J. and Michel, P. and Chen, H. and Patel, P. K. and Remington, B. A. and Bowers, M. and Pelz, L. and Hermann, M. R. and Hsing, W. and Martinez, D. and Sigurdsson, R. and Prantil, M. and Conder, A. and Lawson, J. and Hamamoto, M. and Di Nicola, P. and Widmayer, C. and Homoelle, D. and Lowe-Webb, R. and Herriot, S. and Williams, W. and Alessi, D. and Kalantar, D. and Zacharias, R. and Haefner, C. and Thompson, N. and Zobrist, T. and Lord, D. and Hash, N. and Pak, A. and Lemos, N. and Tabak, M. and McGuffey, C. and Kim, J. and Beg, F. N. and Wei, M. S. and Norreys, P. and Morace, A. and Iwata, N. and Sentoku, Y. and Neely, D. and Scott, G. G. and Flippo, K.},
abstractNote = {New short-pulse kilojoule, Petawatt-class lasers, which have recently come online and are coupled to large-scale, many-beam long-pulse facilities, undoubtedly serve as very exciting tools to capture transformational science opportunities in high energy density physics. These short-pulse lasers also happen to reside in a unique laser regime: very high-energy (kilojoule), relatively long (multi-picosecond) pulse-lengths, and large (10s of micron) focal spots, where their use in driving energetic particle beams is largely unexplored. Proton acceleration via Target Normal Sheath Acceleration (TNSA) using the Advanced Radiographic Capability (ARC) short-pulse laser at the National Ignition Facility in the Lawrence Livermore National Laboratory is demonstrated for the first time, and protons of up to 18 MeV are measured using laser irradiation of >1 ps pulse-lengths and quasi-relativistic (1018 W/cm2) intensities. This is indicative of a super-ponderomotive electron acceleration mechanism that sustains acceleration over long (multi-picosecond) time-scales and allows for proton energies to be achieved far beyond what the well-established scalings of proton acceleration via TNSA would predict at these modest intensities. Furthermore, the characteristics of the ARC laser (large ~100 μm diameter focal spot, flat spatial profile, multi-picosecond, relatively low prepulse) provide acceleration conditions that allow for the investigation of 1D-like particle acceleration. A high flux ~50 J of laser-accelerated protons is experimentally demonstrated. In conclusion, a new capability in multi-picosecond particle-in-cell simulation is applied to model the data, corroborating the high proton energies and elucidating the physics of multi-picosecond particle acceleration.},
doi = {10.1063/1.5085787},
journal = {Physics of Plasmas},
number = 4,
volume = 26,
place = {United States},
year = {2019},
month = {4}
}

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Works referenced in this record:

Energetic proton generation in ultra-intense laser–solid interactions
journal, February 2001

  • Wilks, S. C.; Langdon, A. B.; Cowan, T. E.
  • Physics of Plasmas, Vol. 8, Issue 2, p. 542-549
  • DOI: 10.1063/1.1333697