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Implosion and core heating requirements in subignition experiments FIREX-I

Physics of Plasmas, ISSN: 1070-664X, Vol: 15, Issue: 6
2008
  • 10
    Citations
  • 0
    Usage
  • 9
    Captures
  • 0
    Mentions
  • 0
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Metrics Details

  • Citations
    10
    • Citation Indexes
      10
  • Captures
    9

Article Description

In the fast ignition realization experiment project phase-I (FIREX-I) [H. Azechi and the FIREX Project, Plasma Phys. Control. Fusion 48, B267 (2006)], core heating up to an ion temperature of 5 keV is expected for subignition-class carbon-deuterium (CD) and deuterium-tritium (DT) fuels. The dependence of the achieved ion temperature on heating pulse parameters, and core density is investigated using two-dimensional simulations. Since the core size in FIREX-I is insufficient for self-ignition, and the confinement time is comparable to the heating duration (∼10 ps), the temperature relaxation between the bulk electrons and ions is important for efficient ion heating. High compression (a core density of ρ >200 g cm3) is required for pure DT fuel to shorten the relaxation time. In this case, a heating energy of Eh >2 kJ and a duration of τh <10 ps are required to achieve an ion temperature of 5 keV. For CD and DT+foam fuels, the requirement for implosion is relaxed since the relaxation is fast, due to a large effective charge; 5 keV ion heating is achieved at ρ 50 g cm3 with Eh >2 kJ and τh ∼10 ps. © 2008 American Institute of Physics.

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