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Title: Characterization of laser-driven proton beams from near-critical density targets using copper activation

In this study, copper activation was used to characterize high-energy proton beam acceleration from near-critical density plasma targets. An enhancement was observed when decreasing the target density, which is indicative for an increased laser-accelerated hot electron density at the rear target-vacuum boundary. This is due to channel formation and collimation of the hot electrons inside the target. Particle-in-cell simulations support the experimental observations and show the correlation between channel depth and longitudinal electric field strength is directly correlated with the proton acceleration.
Authors:
 [1] ;  [2] ;  [1] ;  [2] ;  [3] ;  [4] ;  [3] ;  [5] ;  [4] ;  [4] ;  [1] ;  [6] ;  [4] ;  [7] ;  [8] ;  [4]
  1. Univ. of Michigan, Ann Arbor, MI (United States). Center for Ultrafast Optical Science
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. Central Laser Facility, Rutherford Appleton Laboratory, Chilton (United Kingdom)
  4. Imperial College, London (United Kingdom). Blackett Laboratory, The John Adams Institute for Accelerator Science
  5. Institut für Optik und Quantenelektronik, Jena (Germany); Helmholtz Institute Jena (Germany)
  6. Imperial College, London (United Kingdom). Blackett Laboratory, The John Adams Institute for Accelerator Science; GoLP, Instituto Superior Tecnico, Lisbon (Portugal)
  7. University of St Andrews (United Kingdom). High Energy Laser Materials R&D Laboratory
  8. Univ. of Rochester, NY (United States). Lab. for Laser Energetics
Publication Date:
Report Number(s):
LLNL-JRNL-741116
Journal ID: ISSN 0022-3778; applab; 895370
Grant/Contract Number:
AC52-07NA27344
Type:
Accepted Manuscript
Journal Name:
Journal of Plasma Physics
Additional Journal Information:
Journal Volume: 81; Journal Issue: 01; Journal ID: ISSN 0022-3778
Publisher:
Cambridge University Press
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
OSTI Identifier:
1458670

Willingale, L., Nagel, S. R., Thomas, A. G. R., Bellei, C., Clarke, R. J., Dangor, A. E., Heathcote, R., Kaluza, M. C., Kamperidis, C., Kneip, S., Krushelnick, K., Lopes, N., Mangles, S. P. D., Nazarov, W., Nilson, P. M., and Najmudin, Z.. Characterization of laser-driven proton beams from near-critical density targets using copper activation. United States: N. p., Web. doi:10.1017/S002237781400066X.
Willingale, L., Nagel, S. R., Thomas, A. G. R., Bellei, C., Clarke, R. J., Dangor, A. E., Heathcote, R., Kaluza, M. C., Kamperidis, C., Kneip, S., Krushelnick, K., Lopes, N., Mangles, S. P. D., Nazarov, W., Nilson, P. M., & Najmudin, Z.. Characterization of laser-driven proton beams from near-critical density targets using copper activation. United States. doi:10.1017/S002237781400066X.
Willingale, L., Nagel, S. R., Thomas, A. G. R., Bellei, C., Clarke, R. J., Dangor, A. E., Heathcote, R., Kaluza, M. C., Kamperidis, C., Kneip, S., Krushelnick, K., Lopes, N., Mangles, S. P. D., Nazarov, W., Nilson, P. M., and Najmudin, Z.. 2014. "Characterization of laser-driven proton beams from near-critical density targets using copper activation". United States. doi:10.1017/S002237781400066X. https://www.osti.gov/servlets/purl/1458670.
@article{osti_1458670,
title = {Characterization of laser-driven proton beams from near-critical density targets using copper activation},
author = {Willingale, L. and Nagel, S. R. and Thomas, A. G. R. and Bellei, C. and Clarke, R. J. and Dangor, A. E. and Heathcote, R. and Kaluza, M. C. and Kamperidis, C. and Kneip, S. and Krushelnick, K. and Lopes, N. and Mangles, S. P. D. and Nazarov, W. and Nilson, P. M. and Najmudin, Z.},
abstractNote = {In this study, copper activation was used to characterize high-energy proton beam acceleration from near-critical density plasma targets. An enhancement was observed when decreasing the target density, which is indicative for an increased laser-accelerated hot electron density at the rear target-vacuum boundary. This is due to channel formation and collimation of the hot electrons inside the target. Particle-in-cell simulations support the experimental observations and show the correlation between channel depth and longitudinal electric field strength is directly correlated with the proton acceleration.},
doi = {10.1017/S002237781400066X},
journal = {Journal of Plasma Physics},
number = 01,
volume = 81,
place = {United States},
year = {2014},
month = {9}
}