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Title: Time-resolved K α spectroscopy measurements of hot-electron equilibration dynamics in thin-foil solid targets: Collisional and collective effects

Time-resolved K α spectroscopy measurements from high-intensity laser interactions with thin-foil solid targets are reviewed. Thin Cu foils were irradiated with 1- to 10-J, 1-ps pulses at focused intensities from 10 18 to 10 19 W/cm 2. The experimental data show K α-emission pulse widths from 3 to 6 ps, increasing with laser intensity. The time-resolved K α-emission data are compared to a hot-electron transport and K α-production model that includes collisional electron-energy coupling, resistive heating, and electromagnetic field effects. The experimental data show good agreement with the model when a reduced ponderomotive scaling is used to describe the initial mean hot-electron energy over the relevant intensity range.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1]
  1. Univ. of Rochester, Rochester, NY (United States)
Publication Date:
Grant/Contract Number:
NA0001944; Cooperative Agreement No. DE-FC02-0; SC-0012317
Type:
Accepted Manuscript
Journal Name:
Journal of Physics. B, Atomic, Molecular and Optical Physics
Additional Journal Information:
Journal Volume: 48; Journal Issue: 22; Journal ID: ISSN 0953-4075
Publisher:
IOP Publishing
Research Org:
Univ. of Rochester, Rochester, NY (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; K-shell spectroscopy; high-intensity laser; plasma
OSTI Identifier:
1222947
Alternate Identifier(s):
OSTI ID: 1238914

Nilson, P. M., Solodov, A. A., Davies, J. R., Theobald, W., Mileham, C., Stoeckl, C., Begishev, I. A., Zuegel, J. D., Froula, D. H., Betti, R., and Meyerhofer, D. D.. Time-resolved Kα spectroscopy measurements of hot-electron equilibration dynamics in thin-foil solid targets: Collisional and collective effects. United States: N. p., Web. doi:10.1088/0953-4075/48/22/224001.
Nilson, P. M., Solodov, A. A., Davies, J. R., Theobald, W., Mileham, C., Stoeckl, C., Begishev, I. A., Zuegel, J. D., Froula, D. H., Betti, R., & Meyerhofer, D. D.. Time-resolved Kα spectroscopy measurements of hot-electron equilibration dynamics in thin-foil solid targets: Collisional and collective effects. United States. doi:10.1088/0953-4075/48/22/224001.
Nilson, P. M., Solodov, A. A., Davies, J. R., Theobald, W., Mileham, C., Stoeckl, C., Begishev, I. A., Zuegel, J. D., Froula, D. H., Betti, R., and Meyerhofer, D. D.. 2015. "Time-resolved Kα spectroscopy measurements of hot-electron equilibration dynamics in thin-foil solid targets: Collisional and collective effects". United States. doi:10.1088/0953-4075/48/22/224001. https://www.osti.gov/servlets/purl/1222947.
@article{osti_1222947,
title = {Time-resolved Kα spectroscopy measurements of hot-electron equilibration dynamics in thin-foil solid targets: Collisional and collective effects},
author = {Nilson, P. M. and Solodov, A. A. and Davies, J. R. and Theobald, W. and Mileham, C. and Stoeckl, C. and Begishev, I. A. and Zuegel, J. D. and Froula, D. H. and Betti, R. and Meyerhofer, D. D.},
abstractNote = {Time-resolved Kα spectroscopy measurements from high-intensity laser interactions with thin-foil solid targets are reviewed. Thin Cu foils were irradiated with 1- to 10-J, 1-ps pulses at focused intensities from 1018 to 1019 W/cm2. The experimental data show Kα-emission pulse widths from 3 to 6 ps, increasing with laser intensity. The time-resolved Kα-emission data are compared to a hot-electron transport and Kα-production model that includes collisional electron-energy coupling, resistive heating, and electromagnetic field effects. The experimental data show good agreement with the model when a reduced ponderomotive scaling is used to describe the initial mean hot-electron energy over the relevant intensity range.},
doi = {10.1088/0953-4075/48/22/224001},
journal = {Journal of Physics. B, Atomic, Molecular and Optical Physics},
number = 22,
volume = 48,
place = {United States},
year = {2015},
month = {9}
}