1. Increased Ion Temperature and Neutron Yield Observed in Magnetized Indirectly Driven D_{2}-Filled Capsule Implosions on the National Ignition Facility
- Author
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Moody, JD, Pollock, BB, Sio, H, Strozzi, DJ, Ho, DD-M, Walsh, CA, Kemp, GE, Lahmann, B, Kucheyev, SO, Kozioziemski, B, Carroll, EG, Kroll, J, Yanagisawa, DK, Angus, J, Bachmann, B, Bhandarkar, SD, Bude, JD, Divol, L, Ferguson, B, Fry, J, Hagler, L, Hartouni, E, Herrmann, MC, Hsing, W, Holunga, DM, Izumi, N, Javedani, J, Johnson, A, Khan, S, Kalantar, D, Kohut, T, Logan, BG, Masters, N, Nikroo, A, Orsi, N, Piston, K, Provencher, C, Rowe, A, Sater, J, Skulina, K, Stygar, WA, Tang, V, Winters, SE, Zimmerman, G, Adrian, P, Chittenden, JP, Appelbe, B, Boxall, A, Crilly, A, O'Neill, S, Davies, J, Peebles, J, and Fujioka, S
- Abstract
The application of an external 26 Tesla axial magnetic field to a D_{2} gas-filled capsule indirectly driven on the National Ignition Facility is observed to increase the ion temperature by 40% and the neutron yield by a factor of 3.2 in a hot spot with areal density and temperature approaching what is required for fusion ignition [1]. The improvements are determined from energy spectral measurements of the 2.45 MeV neutrons from the D(d,n)^{3}He reaction, and the compressed central core B field is estimated to be ∼4.9 kT using the 14.1 MeV secondary neutrons from the D(T,n)^{4}He reactions. The experiments use a 30 kV pulsed-power system to deliver a ∼3 μs current pulse to a solenoidal coil wrapped around a novel high-electrical-resistivity AuTa_{4} hohlraum. Radiation magnetohydrodynamic simulations are consistent with the experiment.
- Published
- 2022