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Title: Energy transfer from energetic ions to dense plasmas
Author: Edie, Donald
Awarding Body: University of Warwick
Current Institution: University of Warwick
Date of Award: 2012
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Theoretical investigations into the energy deposition of fast ion in dense plasma regimes are presented. These simulations allow insight into the behaviour of charged particle stopping and other energy transfer processes as seen in a dense plasma regime. The modelling of ions within partially ionised plasmas are investigated with respect to their effect on particle scattering interactions. Calculated scattering cross-sections are used as a measure of significance in comparing the cases of ions treated as screened point particles versus the case of bound electrons of finite spatial extent being modelled using Hartree-Fock theory. Prominent effects of naturally occurring, microscopic density fluctuations on particle stopping are then investigated using DFT-MD simulations to describe the local electron densities. An analysis is repeated for several different DFT-MD profiles, representing different target materials and regimes. The results are then presented statistically with a qualitative interpretation. Finally, a simulation is presented which models the inter-particle energy transfer processes that drive the initial stages of an alpha particle burn wave in an inertial fusion scenario. The effects on burn time of such criteria as degeneracy in the target electron system, electron-ion temperature equilibration timescales and the rate of fusion reactions within the hot spot are all investigated and the relative dominance of these variables in different regimes is discussed.
Supervisor: Not available Sponsor: Engineering and Physical Sciences Research Council
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: QC Physics