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Title: High-{rho}R Implosions for Fast-Ignition Fuel Assembly

Abstract

Thick, 40 {mu}m plastic shells filled with 25-35 atm of D{sub 2} or D{sup 3}He were imploded on a low-adiabat ({alpha}{approx_equal}1.3) and with a low-implosion velocity ({approx}2x10{sup 7} cm/s) on the OMEGA laser to generate massive cores of compressed plasma with high areal densities optimal for fast ignition. The targets are driven by 20-kJ relaxation adiabat-shaping laser pulses to keep the inner portion of the shell nearly Fermi degenerate. The measured kinetic energy downshift of proton spectra is in good agreement with the theoretical predictions yielding burn-averaged areal densities of 0.130{+-}0.017 g/cm{sup 2} and peak {rho}R during the burn of about 0.24{+-}0.018 g/cm{sup 2}, the largest {rho}R measured on OMEGA to date. The same implosions with empty plastic shells are expected to reach 1.3 g/cm{sup 2} across the core (i.e., 2{rho}R) enough to stop fast electrons with energies up to 4.5 MeV typical of fast ignition scenarios.

Authors:
; ;  [1];  [2]; ; ; ; ; ; ;  [1];  [3]; ; ; ;  [4]
  1. Fusion Science Center and Laboratory for Laser Energetics, University of Rochester, New York 14623 (United States)
  2. (United States)
  3. NRCN, Negev and Ben Gurion University of the Negev, Beer-Sheva 84015 (Israel)
  4. MIT Plasma Science and Fusion Center and Fusion Science Center, Cambridge Massachusetts, 02139 (United States)
Publication Date:
OSTI Identifier:
20861603
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 98; Journal Issue: 2; Other Information: DOI: 10.1103/PhysRevLett.98.025004; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; DEUTERIUM; ELECTRONS; FUEL ASSEMBLIES; HELIUM 3; IGNITION; IMPLOSIONS; KINETIC ENERGY; LASERS; MEV RANGE 01-10; PLASMA; PROTON SPECTRA; PULSES; RELAXATION; VELOCITY

Citation Formats

Zhou, C. D., Betti, R., Meyerhofer, D. D., Dept. of Mechanical Eng. and Physics and Astronomy, University of Rochester, Rochester, New York 14627, Theobald, W., Radha, P. B., Smalyuk, V. A., Glebov, V. Yu., Stoeckl, C., Anderson, K. S., Sangster, T. C., Shvarts, D., Li, C. K., Petrasso, R. D., Frenje, J. A., and Seguin, F. H. High-{rho}R Implosions for Fast-Ignition Fuel Assembly. United States: N. p., 2007. Web. doi:10.1103/PHYSREVLETT.98.025004.
Zhou, C. D., Betti, R., Meyerhofer, D. D., Dept. of Mechanical Eng. and Physics and Astronomy, University of Rochester, Rochester, New York 14627, Theobald, W., Radha, P. B., Smalyuk, V. A., Glebov, V. Yu., Stoeckl, C., Anderson, K. S., Sangster, T. C., Shvarts, D., Li, C. K., Petrasso, R. D., Frenje, J. A., & Seguin, F. H. High-{rho}R Implosions for Fast-Ignition Fuel Assembly. United States. doi:10.1103/PHYSREVLETT.98.025004.
Zhou, C. D., Betti, R., Meyerhofer, D. D., Dept. of Mechanical Eng. and Physics and Astronomy, University of Rochester, Rochester, New York 14627, Theobald, W., Radha, P. B., Smalyuk, V. A., Glebov, V. Yu., Stoeckl, C., Anderson, K. S., Sangster, T. C., Shvarts, D., Li, C. K., Petrasso, R. D., Frenje, J. A., and Seguin, F. H. Fri . "High-{rho}R Implosions for Fast-Ignition Fuel Assembly". United States. doi:10.1103/PHYSREVLETT.98.025004.
@article{osti_20861603,
title = {High-{rho}R Implosions for Fast-Ignition Fuel Assembly},
author = {Zhou, C. D. and Betti, R. and Meyerhofer, D. D. and Dept. of Mechanical Eng. and Physics and Astronomy, University of Rochester, Rochester, New York 14627 and Theobald, W. and Radha, P. B. and Smalyuk, V. A. and Glebov, V. Yu. and Stoeckl, C. and Anderson, K. S. and Sangster, T. C. and Shvarts, D. and Li, C. K. and Petrasso, R. D. and Frenje, J. A. and Seguin, F. H.},
abstractNote = {Thick, 40 {mu}m plastic shells filled with 25-35 atm of D{sub 2} or D{sup 3}He were imploded on a low-adiabat ({alpha}{approx_equal}1.3) and with a low-implosion velocity ({approx}2x10{sup 7} cm/s) on the OMEGA laser to generate massive cores of compressed plasma with high areal densities optimal for fast ignition. The targets are driven by 20-kJ relaxation adiabat-shaping laser pulses to keep the inner portion of the shell nearly Fermi degenerate. The measured kinetic energy downshift of proton spectra is in good agreement with the theoretical predictions yielding burn-averaged areal densities of 0.130{+-}0.017 g/cm{sup 2} and peak {rho}R during the burn of about 0.24{+-}0.018 g/cm{sup 2}, the largest {rho}R measured on OMEGA to date. The same implosions with empty plastic shells are expected to reach 1.3 g/cm{sup 2} across the core (i.e., 2{rho}R) enough to stop fast electrons with energies up to 4.5 MeV typical of fast ignition scenarios.},
doi = {10.1103/PHYSREVLETT.98.025004},
journal = {Physical Review Letters},
number = 2,
volume = 98,
place = {United States},
year = {Fri Jan 12 00:00:00 EST 2007},
month = {Fri Jan 12 00:00:00 EST 2007}
}