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Title: Experimental Studies of Direct-Drive, Low-Intensity, Low-Adiabat Spherical Implosions on OMEGA

Abstract

Low-adiabat (high-compressibility) implosions were performed with shells filled with 15 atm of D2 gas driven with ~12.5 kJ, 3-ns-square pulse shapes, and a laser intensity of ~2 x 10^14 W/cm^2. Initial target modulations, imprinted on the target surface by laser nonuniformities, were varied by using drive with and without smoothing by spectral dispersion. The performance of the spherical implosions was correlated with measured target modulations at the end of the acceleration pulse performed in a planar target with similar conditions using through-foil radiography. The neutron yield decreases sharply when target modulations become comparable with the target thickness at the end of the acceleration phase. The measured target areal densities are less sensitive to target modulations.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Laboratory for Laser Energetics, University of Rochester
Sponsoring Org.:
USDOE
OSTI Identifier:
899497
Report Number(s):
DOE/SF/19460-727
Journal ID: ISSN 1070-664X; PHPAEN; 1688; 2006-168; TRN: US0703513
DOE Contract Number:
FC52-92SF19460
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 14
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ACCELERATION; IMPLOSIONS; LASERS; NEUTRONS; PERFORMANCE; TARGETS; THICKNESS; DIRECT DRIVE LASER IMPLOSION

Citation Formats

Smalyuk, V.A., Betti, R., Delettrez, J.A., Glebov, V.Yu., Goncharov, V.N., Li, D.Y., Meyerhofer, D.D., Regan, S.P., Roberts, S., Sangster, T.C., Stoeckl, C., Seka, W., Frenje, J.A., Li, C.K., Petrasso, R.D., and Seguin, F.H.. Experimental Studies of Direct-Drive, Low-Intensity, Low-Adiabat Spherical Implosions on OMEGA. United States: N. p., 2006. Web.
Smalyuk, V.A., Betti, R., Delettrez, J.A., Glebov, V.Yu., Goncharov, V.N., Li, D.Y., Meyerhofer, D.D., Regan, S.P., Roberts, S., Sangster, T.C., Stoeckl, C., Seka, W., Frenje, J.A., Li, C.K., Petrasso, R.D., & Seguin, F.H.. Experimental Studies of Direct-Drive, Low-Intensity, Low-Adiabat Spherical Implosions on OMEGA. United States.
Smalyuk, V.A., Betti, R., Delettrez, J.A., Glebov, V.Yu., Goncharov, V.N., Li, D.Y., Meyerhofer, D.D., Regan, S.P., Roberts, S., Sangster, T.C., Stoeckl, C., Seka, W., Frenje, J.A., Li, C.K., Petrasso, R.D., and Seguin, F.H.. Wed . "Experimental Studies of Direct-Drive, Low-Intensity, Low-Adiabat Spherical Implosions on OMEGA". United States. doi:.
@article{osti_899497,
title = {Experimental Studies of Direct-Drive, Low-Intensity, Low-Adiabat Spherical Implosions on OMEGA},
author = {Smalyuk, V.A. and Betti, R. and Delettrez, J.A. and Glebov, V.Yu. and Goncharov, V.N. and Li, D.Y. and Meyerhofer, D.D. and Regan, S.P. and Roberts, S. and Sangster, T.C. and Stoeckl, C. and Seka, W. and Frenje, J.A. and Li, C.K. and Petrasso, R.D. and Seguin, F.H.},
abstractNote = {Low-adiabat (high-compressibility) implosions were performed with shells filled with 15 atm of D2 gas driven with ~12.5 kJ, 3-ns-square pulse shapes, and a laser intensity of ~2 x 10^14 W/cm^2. Initial target modulations, imprinted on the target surface by laser nonuniformities, were varied by using drive with and without smoothing by spectral dispersion. The performance of the spherical implosions was correlated with measured target modulations at the end of the acceleration pulse performed in a planar target with similar conditions using through-foil radiography. The neutron yield decreases sharply when target modulations become comparable with the target thickness at the end of the acceleration phase. The measured target areal densities are less sensitive to target modulations.},
doi = {},
journal = {Physics of Plasmas},
number = ,
volume = 14,
place = {United States},
year = {Wed Feb 15 00:00:00 EST 2006},
month = {Wed Feb 15 00:00:00 EST 2006}
}