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Title: Two-dimensional time-resolved ultra-high speed imaging of K-alpha emission from short-pulse-laser interactions to observe electron recirculation

Time resolved x-ray images with 7 ps resolution are recorded on relativistic short-pulse laser-plasma experiments using the dilation x-ray imager, a high-speed x-ray framing camera, sensitive to x-rays in the range of ≈1-17 keV. Furthermore, this capability enables a series of 2D x-ray images to be recorded at picosecond scales, which allows for the investigation of fast electron transport within the target with unprecedented temporal resolution. With an increase in the Kα-emission spot size over time we found that targets were thinner than the recirculation limit and is absent for thicker targets. Together with the observed polarization dependence of the spot size increase, this indicates that electron recirculation is relevant for the x-ray production in thin targets.
Authors:
ORCiD logo [1] ;  [1] ;  [1] ;  [1] ; ORCiD logo [1] ;  [2] ; ORCiD logo [3] ;  [1] ; ORCiD logo [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. General Atomics, San Diego, CA (United States)
  3. University of Alberta, Edmonton, Alberta T6G 2R3, Canada
Publication Date:
Report Number(s):
LLNL-JRNL-717398
Journal ID: ISSN 0003-6951; APPLAB
Grant/Contract Number:
AC52-07NA27344; NA0001808
Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 110; Journal Issue: 14; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION
OSTI Identifier:
1368021
Alternate Identifier(s):
OSTI ID: 1361807

Nagel, S. R., Chen, H., Park, J., Foord, M., Hazi, A. U., Hilsabeck, T. J., Kerr, S. M., Marley, E. V., and Williams, G. J.. Two-dimensional time-resolved ultra-high speed imaging of K-alpha emission from short-pulse-laser interactions to observe electron recirculation. United States: N. p., Web. doi:10.1063/1.4979802.
Nagel, S. R., Chen, H., Park, J., Foord, M., Hazi, A. U., Hilsabeck, T. J., Kerr, S. M., Marley, E. V., & Williams, G. J.. Two-dimensional time-resolved ultra-high speed imaging of K-alpha emission from short-pulse-laser interactions to observe electron recirculation. United States. doi:10.1063/1.4979802.
Nagel, S. R., Chen, H., Park, J., Foord, M., Hazi, A. U., Hilsabeck, T. J., Kerr, S. M., Marley, E. V., and Williams, G. J.. 2017. "Two-dimensional time-resolved ultra-high speed imaging of K-alpha emission from short-pulse-laser interactions to observe electron recirculation". United States. doi:10.1063/1.4979802. https://www.osti.gov/servlets/purl/1368021.
@article{osti_1368021,
title = {Two-dimensional time-resolved ultra-high speed imaging of K-alpha emission from short-pulse-laser interactions to observe electron recirculation},
author = {Nagel, S. R. and Chen, H. and Park, J. and Foord, M. and Hazi, A. U. and Hilsabeck, T. J. and Kerr, S. M. and Marley, E. V. and Williams, G. J.},
abstractNote = {Time resolved x-ray images with 7 ps resolution are recorded on relativistic short-pulse laser-plasma experiments using the dilation x-ray imager, a high-speed x-ray framing camera, sensitive to x-rays in the range of ≈1-17 keV. Furthermore, this capability enables a series of 2D x-ray images to be recorded at picosecond scales, which allows for the investigation of fast electron transport within the target with unprecedented temporal resolution. With an increase in the Kα-emission spot size over time we found that targets were thinner than the recirculation limit and is absent for thicker targets. Together with the observed polarization dependence of the spot size increase, this indicates that electron recirculation is relevant for the x-ray production in thin targets.},
doi = {10.1063/1.4979802},
journal = {Applied Physics Letters},
number = 14,
volume = 110,
place = {United States},
year = {2017},
month = {4}
}