Probing ion species separation and ion thermal decoupling in shock-driven implosions using multiple nuclear reaction histories
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center
- Alternative Energies and Atomic Energy Commission (CEA), Arpajon (France). DAM Ile-de-France (DIF)
- Univ. degli Studi di Roma “La Sapienza,” Roma (Italy)
- Univ. of Rochester, NY (United States). Lab. for Laser Energetics
Simultaneously measured DD, DT, and D3He reaction histories are used to probe the impacts of multi-ion physics during the shock phase of inertial confinement fusion implosions. In these relatively hydrodynamiclike (burn-averaged Knudsen number ⟨NK⟩ ~0.3) shock-driven implosions, average-ion hydrodynamic DUED simulations are able to reasonably match burnwidths, nuclear yields, and ion temperatures. However, kinetic-ion FPION simulations are able to better simulate the timing differences and time-resolved reaction rate ratios between DD, DT, and D3He reactions. FPION simulations suggest that the D3He/DT reaction rate ratio is most directly impacted by ion species separation between the 3He and T ions, whereas the D3He/DD reaction rate ratio is affected by both ion species separation and ion temperature decoupling effects.
- Research Organization:
- Krell Institute, Ames, IA (United States); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Ohio Univ., Athens, OH (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- FC52-08NA28752; NA0001857; NA0002035; NA0002905; NA0002949
- OSTI ID:
- 1614443
- Alternate ID(s):
- OSTI ID: 1545415
- Journal Information:
- Physics of Plasmas, Vol. 26, Issue 7; ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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