Fast-electron generation in long-scale-length plasmas

B. Yaakobi, P. Y. Chang, A. Solodov, C. Stoeckl, D. H. Edgell, R. S. Craxton, S. X. Hu, J. F. Myatt, F. J. Marshall, W. Seka, D. H. Froula

Research output: Contribution to journalArticle

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Abstract

Long-scale-length (∼400-m) planar CH plasmas have been generated on OMEGA EP with laser intensities of the order of 10 14 W/cm 2 and ∼1-mm focal spots to quantify the number and temperature of fast electrons caused by the two-plasmon-decay instability. The main diagnostics were the time-integrated K α line emission and the hard x-ray bremsstrahlung (HXR) from a molybdenum (Mo) substrate. For the intensity range of 1-7 × 10 14 W/cm 2, the Mo K α and HXR energies increased by more than three orders of magnitude. The fast-electron temperature in this range (deduced from the x-ray bremsstrahlung emission) rose from ∼20 keV to ∼90 keV. A Monte Carlo code was used to estimate the total energy (or number) of fast electrons based on these two experimental signatures. The resulting energy in fast electrons as a fraction of the laser energy was found to rise in the same intensity range up to ∼1.

Original languageEnglish
Article number012704
JournalPhysics of Plasmas
Volume19
Issue number1
DOIs
Publication statusPublished - 2012 Jan 1

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bremsstrahlung
molybdenum
electrons
K lines
x rays
energy
lasers
signatures
electron energy
methylidyne
decay
estimates
temperature

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

Yaakobi, B., Chang, P. Y., Solodov, A., Stoeckl, C., Edgell, D. H., Craxton, R. S., ... Froula, D. H. (2012). Fast-electron generation in long-scale-length plasmas. Physics of Plasmas, 19(1), [012704]. https://doi.org/10.1063/1.3676153
Yaakobi, B. ; Chang, P. Y. ; Solodov, A. ; Stoeckl, C. ; Edgell, D. H. ; Craxton, R. S. ; Hu, S. X. ; Myatt, J. F. ; Marshall, F. J. ; Seka, W. ; Froula, D. H. / Fast-electron generation in long-scale-length plasmas. In: Physics of Plasmas. 2012 ; Vol. 19, No. 1.
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Yaakobi, B, Chang, PY, Solodov, A, Stoeckl, C, Edgell, DH, Craxton, RS, Hu, SX, Myatt, JF, Marshall, FJ, Seka, W & Froula, DH 2012, 'Fast-electron generation in long-scale-length plasmas', Physics of Plasmas, vol. 19, no. 1, 012704. https://doi.org/10.1063/1.3676153

Fast-electron generation in long-scale-length plasmas. / Yaakobi, B.; Chang, P. Y.; Solodov, A.; Stoeckl, C.; Edgell, D. H.; Craxton, R. S.; Hu, S. X.; Myatt, J. F.; Marshall, F. J.; Seka, W.; Froula, D. H.

In: Physics of Plasmas, Vol. 19, No. 1, 012704, 01.01.2012.

Research output: Contribution to journalArticle

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Yaakobi B, Chang PY, Solodov A, Stoeckl C, Edgell DH, Craxton RS et al. Fast-electron generation in long-scale-length plasmas. Physics of Plasmas. 2012 Jan 1;19(1). 012704. https://doi.org/10.1063/1.3676153