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Showing 1 to 12 of 12 for “"astrophysical plasmas"”.
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Multifluid Kelvin-Helmholtz instability in weakly ionised astrophysical plasmas
… (MHD), we examine the dynamics of weakly ionised astrophysical plasma flows in a multifluid regime. This numerical study is carried out using the multifluid MHD code HYDRA. An outline of the structure of this code is given in chapter 2 and the schemes which are implemented integrates the MHD …
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R-matrix calculations in support of diagnostics for fusion and astrophysical plasmas
… of impurities into magnetically confined fusion plasmas, atomic data for the low ion stages of iron facilitates the study of astrophysical plasmas across every corner of the universe.<br/><br/>To study the atomic structures of Mo I, W I, and Fe II we make use of sophisticated configuration …
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Charge Transfer Cross-Sections for Nitrogen(v) and Sulfur(iii) Ions Interacting With Hydrogen Atoms in Astrophysical Plasmas
… decade, the important role of charge exchange in astrophysical plasmas has become firmly established following the initial work of Williams (1973), Steigman (1975) and others. However for multiply charged ions of astrophysical importance, reliable experimental values for the reactive cross …
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Charge transfer cross-sections for N V and S III ions interacting with hydrogen atoms in astrophysical plasmas
Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-13T16:16:05Z No. of bitstreams: 1 1983_feickert.pdf: 4061766 bytes, checksum: 84661d96346e5c8896ea444768dd1395 (MD5)
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Dirac R-matrix scattering calculations in support of plasma diagnostics
… of impurities into magnetically confined fusion plasmas. The atomic data for Ni II and Ge III provide more interest for astrophysical plasmas. In order to accurately represent the collisional processes for these species, scattering calculations are carried out using the relativistic Dirac …
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SUPPRESSION OF ELECTRON THERMAL CONDUCTION IN THE HIGH β INTRACLUSTER MEDIUM OF GALAXY CLUSTERS
… The basic physics of thermal conduction in plasmas with ICM-like conditions has yet to be elucidated, however. We use particle-in-cell simulations and analytic models to explore the dynamics of an ICM-like plasma (with small gyroradius, large mean-free-path, and strongly sub-dominant …
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Controlling for the Ionospheric and Baseline-Offset Uncertainties in the CHIME/FRB Outriggers VLBI Network for Milliarcsecond Precision
… them while also holding information about the astrophysical plasmas they traverse on their journey to Earth. The Canadian Hydrogen Intensity Mapping Experiment (CHIME)/FRB project has led the field with the hundreds of FRB detections the collaboration has published to date. However, these …
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Using fusion-product spectroscopy to study inertial fusion implosions, stopping power, and astrophysical nucleosynthesis at OMEGA and the NIF
… products from fusion reactions occurring in plasmas, nuclear diagnostics can be used to study the properties of the burning plasma, as a probe of the plasma, or of the fundamental fusion reaction physics. In this thesis, fusion product spectroscopy is used to study ignition-scale inertial …
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Radiatively Cooled Magnetic Reconnection Experiments Driven by Pulsed Power
Magnetic reconnection is a ubiquitous process in astrophysical plasmas, responsible for the explosive conversion of magnetic energy into thermal and kinetic energy. In extreme astrophysical systems, such as black hole coronae and neutron star magnetospheres, radiative cooling modifies the energy …
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Experimental Studies of Magnetic Field Generation and Saturation Mechanisms in Laser-Driven Plasmas
… are demonstrated with radiographs of OMEGA plasmas with magnetic and electric fields, and in hohlraum geometries where 3.0 MeV proton data is often inadequate for field reconstruction. Two magnetic field generation phenomena, the Biermann battery and the electron Weibel instability, are …
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Evolution of the distribution of high energy nuclei and induced collective modes in plasmas
Recent experiments in plasmas undergoing fusion have shown evidence of novel processes which are correlated with the onset of fusion reactions. In view of such evidence and observed effects of the injection of high energy neutral beams in laboratory plasmas, as well as the existence of …
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Generalised mathematical models for 3D magnetic reconnection at null points: magnetic reconnection at null points
Plasmas occur in many technical, laboratory and space environments, and often behave in a highly ideal manner. This means that advection of the plasma can store large amounts of energy in the magnetic field. This energy is released when a sudden change in the magnetic topology of the field …