Probing high areal-density cryogenic deuterium-tritium implosions using downscattered neutron spectra measured by the magnetic recoil spectrometer

Journal Article · Sat May 15 00:00:00 EDT 2010 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3304475· OSTI ID:21371297

Frenje, J A; Casey, D T; Li, C K; Seguin, F H; Petrasso, R D ^[1]; Glebov, V Yu; Radha, P B; Sangster, T C; Meyerhofer, D D ^[2]; Hatchett, S P; Haan, S W; Cerjan, C J; Landen, O L ^[3]; Fletcher, K A ^[4]; Leeper, R J ^[5]

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1. Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
2. Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623 (United States)
3. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
4. Geneseo State University, Geneseo, New York 14454 (United States)
5. Sandia National Laboratory, New Mexico 87123 (United States)

For the first time high areal-density (rhoR) cryogenic deuterium-tritium (DT) implosions have been probed using downscattered neutron spectra measured with the magnetic recoil spectrometer (MRS) [J. A. Frenje et al., Rev. Sci. Instrum. 79, 10E502 (2008)], recently installed and commissioned on OMEGA [T. R. Boehly et al., Opt. Commun. 133, 495 (1997)]. The rhoR data obtained with the MRS have been essential for understanding how the fuel is assembled and for guiding the cryogenic program at the Laboratory for Laser Energetics (LLE) to rhoR values up to approx300 mg/cm{sup 2}. The rhoR data obtained from well-established charged particle spectrometry techniques [C. K. Li et al., Phys. Plasmas 8, 4902 (2001)] were used to authenticate the MRS data for low-rhoR plastic capsule implosions, and the rhoR values inferred from these techniques are in excellent agreement, indicating that the MRS technique provides high-fidelity data. Recent OMEGA-MRS data and Monte Carlo simulations have shown that the MRS on the NIF [G. H. Miller et al., Nucl. Fusion 44, S228 (2004)] will meet most of the absolute and relative requirements for determining rhoR, ion temperature (T{sub i}) and neutron yield (Y{sub n}) in both low-yield, tritium-rich, deuterium-lean, hydrogen-doped implosions and high-yield DT implosions.

• OSTI ID: 21371297
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 5 Vol. 17; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CALCULATION METHODS
COMPUTERIZED SIMULATION
DEUTERIUM
HYDROGEN ISOTOPES
IMPLOSIONS
ION TEMPERATURE
ISOTOPES
LIGHT NUCLEI
MEASURING INSTRUMENTS
MONTE CARLO METHOD
NEUTRON SPECTRA
NEUTRON SPECTROMETERS
NUCLEAR REACTION YIELD
NUCLEI
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
PLASMA DIAGNOSTICS
RADIOISOTOPES
SIMULATION
SPECTRA
SPECTROMETERS
STABLE ISOTOPES
TRITIUM
YEARS LIVING RADIOISOTOPES
YIELDS