TITLE

Measurements of fuel and shell areal densities of OMEGA capsule implosions using elastically scattered protons

AUTHOR(S)
Frenje, J. A.; Li, C. K.; Séguin, F. H.; Kurebayashi, S.; Petrasso, R. D.; Soures, J. M.; Delettrez, J.; Glebov, V. Yu.; Meyerhofer, D. D.; Radha, P. B.; Roberts, S.; Sangster, T. C.; Skupsky, S.; Stoeckl, C.
PUB. DATE
November 2002
SOURCE
Physics of Plasmas;Nov2002, Vol. 9 Issue 11, p4719
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Implosions of capsules filled with small quantities of deuterium–tritium (DT) were studied using up to seven proton spectrometers on the OMEGA laser system [T. R. Boehly et al., Opt. Commun. 133, 495 (1997)]. Simultaneous measurements of elastically scattered protons, i.e., “knock-on” protons generated from DT neutrons were obtained in several directions. The capsules, nominally 945 μm in diameter and with CD shells of ∼20 μm thickness, were filled to about 15 atm and irradiated with 23 kJ of UV light. The high-energy protons from these implosions were used to infer fuel areal density (6.8±0.5 mg/cm[sup 2]), an average shell areal density (71±3 mg/cm[sup 2]), and shell asymmetries of up to about 25 mg/cm2. In addition to presenting new results, these measurements verify and significantly improve upon the accuracy of the fuel areal density results obtained utilizing knock-on deuterons from hydrodynamically equivalent, pure DT implosions [C. K. Li et al., Phys. Plasmas 8, 4902 (2001)]. © 2002 American Institute of Physics.
ACCESSION #
7640313

 

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