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Title: Laser-Driven Magnetic-Flux Compression in High-Energy-Density Plasmas

Abstract

The demonstration of magnetic field compression to many tens of megagauss in cylindrical implosions of inertial confinement fusion targets is reported for the first time. The OMEGA laser [T.R. Boehly et al., Opt. Commun. 133, 495 (1997)] was used to implode cylindrical CH targets filled with deuterium gas and seeded with a strong external field (>50 kG) from a specially developed magnetic pulse generator. This seed field was trapped (frozen) in the shock-heated gas fill and compressed by the imploding shell at a high implosion velocity, minimizing the effect of resistive flux diffusion. The magnetic fields in the compressed core were probed via proton deflectrometry using the fusion products from an imploding D3He target. Line-averaged magnetic fields between 30 and 40 MG were observed.

Authors:
; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Laboratory for Laser Energetics, University of Rochester
Sponsoring Org.:
USDOE
OSTI Identifier:
968626
Report Number(s):
DOE/NA/28302-917
2009-72; 1900
DOE Contract Number:  
FC52-08NA28302
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 103; Journal Issue: 21
Country of Publication:
United States
Language:
English

Citation Formats

Gotchev, O.V., Chang, P.Y., Knauer, J.P., Meyerhofer, D.D., Polomarov, O., Frenje, J., Li, C.K., Manuel, M.J.-E., Petrasso, R.D., Rygg, J.R., Seguin, F.H., and Betti, R. Laser-Driven Magnetic-Flux Compression in High-Energy-Density Plasmas. United States: N. p., 2009. Web. doi:10.1103/PhysRevLett.103.215004.
Gotchev, O.V., Chang, P.Y., Knauer, J.P., Meyerhofer, D.D., Polomarov, O., Frenje, J., Li, C.K., Manuel, M.J.-E., Petrasso, R.D., Rygg, J.R., Seguin, F.H., & Betti, R. Laser-Driven Magnetic-Flux Compression in High-Energy-Density Plasmas. United States. doi:10.1103/PhysRevLett.103.215004.
Gotchev, O.V., Chang, P.Y., Knauer, J.P., Meyerhofer, D.D., Polomarov, O., Frenje, J., Li, C.K., Manuel, M.J.-E., Petrasso, R.D., Rygg, J.R., Seguin, F.H., and Betti, R. Tue . "Laser-Driven Magnetic-Flux Compression in High-Energy-Density Plasmas". United States. doi:10.1103/PhysRevLett.103.215004.
@article{osti_968626,
title = {Laser-Driven Magnetic-Flux Compression in High-Energy-Density Plasmas},
author = {Gotchev, O.V. and Chang, P.Y. and Knauer, J.P. and Meyerhofer, D.D. and Polomarov, O. and Frenje, J. and Li, C.K. and Manuel, M.J.-E. and Petrasso, R.D. and Rygg, J.R. and Seguin, F.H. and Betti, R.},
abstractNote = {The demonstration of magnetic field compression to many tens of megagauss in cylindrical implosions of inertial confinement fusion targets is reported for the first time. The OMEGA laser [T.R. Boehly et al., Opt. Commun. 133, 495 (1997)] was used to implode cylindrical CH targets filled with deuterium gas and seeded with a strong external field (>50 kG) from a specially developed magnetic pulse generator. This seed field was trapped (frozen) in the shock-heated gas fill and compressed by the imploding shell at a high implosion velocity, minimizing the effect of resistive flux diffusion. The magnetic fields in the compressed core were probed via proton deflectrometry using the fusion products from an imploding D3He target. Line-averaged magnetic fields between 30 and 40 MG were observed.},
doi = {10.1103/PhysRevLett.103.215004},
journal = {Physical Review Letters},
number = 21,
volume = 103,
place = {United States},
year = {2009},
month = {12}
}