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Title: Demonstration of Enhanced Radiation Drive in Hohlraums Made from a Mixture of High-Z Wall Materials

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL) National Synchrotron Light Source
Sponsoring Org.:
Doe - Office Of Science
OSTI Identifier:
959526
Report Number(s):
BNL-82512-2009-JA
DOE Contract Number:
DE-AC02-98CH10886
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 98
Country of Publication:
United States
Language:
English
Subject:
national synchrotron light source

Citation Formats

Schein,J., Jones, O., Rosen, M., Dewald, E., Glenzer, S., Gunther, J., Hammel, B., Landen, O., Suter, L., and Wallace, R. Demonstration of Enhanced Radiation Drive in Hohlraums Made from a Mixture of High-Z Wall Materials. United States: N. p., 2007. Web. doi:10.1103/PhysRevLett.98.175003.
Schein,J., Jones, O., Rosen, M., Dewald, E., Glenzer, S., Gunther, J., Hammel, B., Landen, O., Suter, L., & Wallace, R. Demonstration of Enhanced Radiation Drive in Hohlraums Made from a Mixture of High-Z Wall Materials. United States. doi:10.1103/PhysRevLett.98.175003.
Schein,J., Jones, O., Rosen, M., Dewald, E., Glenzer, S., Gunther, J., Hammel, B., Landen, O., Suter, L., and Wallace, R. Mon . "Demonstration of Enhanced Radiation Drive in Hohlraums Made from a Mixture of High-Z Wall Materials". United States. doi:10.1103/PhysRevLett.98.175003.
@article{osti_959526,
title = {Demonstration of Enhanced Radiation Drive in Hohlraums Made from a Mixture of High-Z Wall Materials},
author = {Schein,J. and Jones, O. and Rosen, M. and Dewald, E. and Glenzer, S. and Gunther, J. and Hammel, B. and Landen, O. and Suter, L. and Wallace, R.},
abstractNote = {},
doi = {10.1103/PhysRevLett.98.175003},
journal = {Physical Review Letters},
number = ,
volume = 98,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}
  • We present results from experiments, numerical simulations and analytic modeling, demonstrating enhanced hohlraum performance. Care in the fabrication and handling of hohlraums with walls consisting of high-Z mixtures (cocktails) has led to our demonstration, for the first time, of a significant increase in radiation temperature compared to a pure Au hohlraum that is in agreement with predictions and is ascribable to reduced wall losses. The data suggest that a National Ignition Facility ignition hohlraum made of a U:Au:Dy cocktail should have {approx}17% reduction in wall losses compared to a similar gold hohlraum.
  • We present results from experiments, numerical simulations and analytic modeling, demonstrating enhanced hohlraum performance. Care in the fabrication and handling of hohlraums with walls consisting of high-Z mixtures (cocktails) has led to our demonstration, for the first time, of a significant increase in radiation temperature compared to a pure Au hohlraum that is in agreement with predictions and is ascribable to reduced wall losses. This data suggests that a NIF ignition hohlraum made of a U:Au:Dy cocktail should have {approx}17% reduction in wall losses compared to a similar gold hohlraum.
  • We present results from experiments, numerical simulations and analytic modeling, demonstrating enhanced hohlraum performance. Care in the fabrication and handling of hohlraums with walls consisting of high-Z mixtures (cocktails) has led to our demonstration, for the first time, of a significant increase in radiation temperature (up to +7eV at 300 eV) compared to a pure Au hohlraum, in agreement with predictions and ascribable to reduced wall losses. The data extrapolated to full NIF suggest we can expect an 18% reduction in wall loss for the current ignition design by switching to cocktail hohlraums, consistent with requirements for ignition with 1MJmore » laser energy.« less
  • We demonstrate the hohlraum radiation temperature and symmetry required for ignition-scale inertial confinement fusion capsule implosions. Cryogenic gas-filled hohlraums with 2.2 mm-diameter capsules are heated with unprecedented laser energies of 1.2 MJ delivered by 192 ultraviolet laser beams on the National Ignition Facility. Laser backscatter measurements show that these hohlraums absorb 87% to 91% of the incident laser power resulting in peak radiation temperatures of T{sub RAD}=300 eV and a symmetric implosion to a 100 {mu}m diameter hot core.