The Ignition Requirements of the Degeneracy Microspheres of Deuterium Helium-3 Mixture with Low-Radioactive |
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Authors: | M Mahdavi F Khodadadi Azadboni |
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Affiliation: | 1. Physics Department, Mazandaran University, P.O. Box 47415-416, Babolsar, Iran
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Abstract: | This paper examines the burn characteristics for inertial confinement D/3 He fuel pellets with different concentrations of Helium-3. It is shown that the Helium-3 relative density of the fuel mixture plays a significant role in determining the burn characteristics and fuel gain. In spite of the safety of the plasma degeneracy of D/3 He fuel with fraction of y?=?0.2 (y: Helium-3 content parameter), ignition of fuel is impossible. In design fuel extra to safety should be considered fractional burn-up and fuel gain. The main contribution of this research is to show that the plasma degeneracy of equimolar mixture of D/3 He fuel lowers the ignition temperature and increases fuel gain. The results indicate that a $n_{D} /n_{{^{3} He}}$ ?≤?0.3 is difficult to ignite reasonable driver energy. A fuel gain of 378 can be obtained with a D/3 He fuel with fraction of y?=?0.33, and areal density (ρR) of 12 g/cm2. It is found that the fuel gain of an equimolar D/3 He fuel at temperature of 70?keV and ρR value of 8.5 g/cm2 is 480. This value gain is higher by about 22% than the case of the pellets (y?=?0.33). |
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