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

doi:10.1063/1.3676153

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

Institute of Space and Plasma Sciences

Research output: Contribution to journal › Article › peer-review

48 Citations (Scopus)

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 language	English
Article number	012704
Journal	Physics of Plasmas
Volume	19
Issue number	1
DOIs	https://doi.org/10.1063/1.3676153
Publication status	Published - 2012 Jan

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

Access to Document

10.1063/1.3676153

Cite this

@article{09e540ff5fcc4bd9b401657ba34a86ee,

title = "Fast-electron generation in long-scale-length plasmas",

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.",

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

note = "Funding Information: This work was supported by the U.S. Department of Energy Office of Inertial Confinement Fusion under Cooperative Agreement No. DE-FC52-08NA28302, the University of Rochester, and the New York State Energy Research and Development Authority. The support of DOE does not constitute an endorsement by DOE of the views expressed in this article.",

year = "2012",

month = jan,

doi = "10.1063/1.3676153",

language = "English",

volume = "19",

journal = "Physics of Plasmas",

issn = "1070-664X",

publisher = "American Institute of Physics Publising LLC",

number = "1",

}

TY - JOUR

T1 - Fast-electron generation in long-scale-length plasmas

AU - Yaakobi, B.

AU - Chang, P. Y.

AU - Solodov, A.

AU - Stoeckl, C.

AU - Edgell, D. H.

AU - Craxton, R. S.

AU - Hu, S. X.

AU - Myatt, J. F.

AU - Marshall, F. J.

AU - Seka, W.

AU - Froula, D. H.

N1 - Funding Information: This work was supported by the U.S. Department of Energy Office of Inertial Confinement Fusion under Cooperative Agreement No. DE-FC52-08NA28302, the University of Rochester, and the New York State Energy Research and Development Authority. The support of DOE does not constitute an endorsement by DOE of the views expressed in this article.

PY - 2012/1

Y1 - 2012/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=84859176885&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84859176885&partnerID=8YFLogxK

U2 - 10.1063/1.3676153

DO - 10.1063/1.3676153

M3 - Article

AN - SCOPUS:84859176885

SN - 1070-664X

VL - 19

JO - Physics of Plasmas

JF - Physics of Plasmas

IS - 1

M1 - 012704

ER -

Fast-electron generation in long-scale-length plasmas

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this