Initial Comparisons of Dual Nuclear Reactions in Thin Glass DT Capsules

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Initial Comparisons of Dual Nuclear Reactions in
Thin Glass DT Capsules
DD-p (3 MeV)
Charged Particle Spectrometer
DT-a (3.5 MeV)
DD-n (2.45 MeV)
Neutron Time of Flight
DT-n (14.1 MeV)
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Collaborators
C.D. Chen, J. R. Rygg, S. Volkmer, D. Casey, F.
H. Séguin, J. A. Frenje, C. K. Li, and R. D.
Petrasso Plasma Science and Fusion
Center Massachusetts Institute of Technology J.
Delettrez, V. Yu. Glebov, S. Regan, S. Roberts,
T. Sangster, and V. Smalyuk Laboratory for Laser
Energetics University of Rochester
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Motivation

• Dual nuclear reactions provide additional
  information about the target implosion
• Dual spectra and yields allow for more rigorous
  benchmarking of simulations
• Analysis of perceived discrepancies may shed
  physical insight into the implosion dynamics

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The Charged Particle Spectrometer allows us to
measure spectra and yields on OMEGA
The magnet spectrometer directs particles onto
appropriately filtered CR-39 detectors.
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In thin glass DT implosions, CPS can measure the
yield and spectra of the DD-p in the DT noise
Shot 39792 DT(20)SiO23
Track Diameter filtering (also contrast,
eccentricity)
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We can derive an Tion from Doppler broadening
Tion can be derived from Doppler broadening.
s in keV, C 1510 for DD-p
nTOF provides us with DT neutron yields and Tion
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CPS provides us with DD-p yields in thin glass
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Reaction ratios fall slightly outside of expected
ranges
Data Range
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Future Work

• Examine YOC and compare to DHe3 YOC discrepancies
• Since DD-p do not escape CH surrogate capsules,
  we must study the DD-n with nTOF. We currently
  cannot see the DD-n in the DT-n background.
• Thin Glass DD-p yields and spectra will allow us
  to validate DD neutron data when techniques are
  developed.