Δημοσιεύσεις

Project Acronym: LaMIPlaS
Title: Laser Matter Interactions and Plasma Simulations
Affiliation: technological educational institute of crete
Pi: Vasilis Dimitriou
Research Field: laser matter interactions and plasma simulations

Computational study of plasma dynamic evolution produced by low current table-top pinch plasma devices
by Koundourakis, George, Skoulakis, Alexandros, Kaselouris, Evaggelos, Fitilis, Ioannis, Bakarezos, Makis, L Clark, E, Chatzakis, John, Vlahakis, Nektarios, Papadogiannis, Nektarios, Vasillis, Dimitriou and Tatarakis, M
Abstract:
In our computational study, the astrophysical MHD code PLUTO [1,2] is partially modified to simulate the dynamics of plasma evolution generated by pulsed power generators like Z-and X-Pinch devices. A first attempt to simulate the plasma behavior with the standard MHD equations and ideal EOS of the code gave large deviations from the experimental data. Therefore, new algorithms for the PLUTO modules that extend the field of the applicability of the code to the laboratory plasmas are developed and tested, summarized to the: i. modified PVTE equations of state-EOS using tabulated data by SESAME MGGB Database ii. electric resistivity according to the formulation of Spitzer iii. radiative losses from an optically thin plasma using tabulated data by FLYCHK code iv. modified radiation transfer model updated to include metal materials v. determination of plasma temperature, for which the effective ionization charge state, tabulated values by the FLYCHK code are used. vi. Dynamic correction of the magnetic field along run time through a sinusoidal current form according to the experiment. Simultaneously the Stokes theorem is used to keep the right relation between the magnetic field and the current density neglecting the displacement term. vii. The skin effect is taken into account. These new approaches are adopted to simulate the material models of a specific problem: the Z-load wire of tungsten and the surrounding low mass density region of air (vacuum). The PLUTO modifications provide the ability of studying the formation of minidiodes, constrictions and also micro explosions of the hot points, on Z-type loads. Such studies are also promising for the investigation of the development of early time plasma instabilities in ICF related laser generated plasmas.
Reference:
Computational study of plasma dynamic evolution produced by low current table-top pinch plasma devices (Koundourakis, George, Skoulakis, Alexandros, Kaselouris, Evaggelos, Fitilis, Ioannis, Bakarezos, Makis, L Clark, E, Chatzakis, John, Vlahakis, Nektarios, Papadogiannis, Nektarios, Vasillis, Dimitriou and Tatarakis, M), In , 2018.
Bibtex Entry:
@inproceedings{inpro2018,
 author = {Koundourakis, George and Skoulakis, Alexandros and Kaselouris, Evaggelos and Fitilis, Ioannis and Bakarezos, Makis and L Clark, E and Chatzakis, John and Vlahakis, Nektarios and Papadogiannis, Nektarios and Vasillis, Dimitriou and Tatarakis, M},
 year = {2018},
 bibyear = {2018},
 month = {10},
 title = {Computational study of plasma dynamic evolution produced by low current table-top pinch plasma devices},
 abstract = {In our computational study, the astrophysical MHD code PLUTO [1,2] is partially modified to simulate the dynamics of plasma evolution generated by pulsed power generators like Z-and X-Pinch devices. A first attempt to simulate the plasma behavior with the standard MHD equations and ideal EOS of the code gave large deviations from the experimental data. Therefore, new algorithms for the PLUTO modules that extend the field of the applicability of the code to the laboratory plasmas are developed and tested, summarized to the: i. modified PVTE equations of state-EOS using tabulated data by SESAME MGGB Database ii. electric resistivity according to the formulation of Spitzer iii. radiative losses from an optically thin plasma using tabulated data by FLYCHK code iv. modified radiation transfer model updated to include metal materials v. determination of plasma temperature, for which the effective ionization charge state, tabulated values by the FLYCHK code are used. vi. Dynamic correction of the magnetic field along run time through a sinusoidal current form according to the experiment. Simultaneously the Stokes theorem is used to keep the right relation between the magnetic field and the current density neglecting the displacement term. vii. The skin effect is taken into account. These new approaches are adopted to simulate the material models of a specific problem: the Z-load wire of tungsten and the surrounding low mass density region of air (vacuum). The PLUTO modifications provide the ability of studying the formation of minidiodes, constrictions and also micro explosions of the hot points, on Z-type loads. Such studies are also promising for the investigation of the development of early time plasma instabilities in ICF related laser generated plasmas.},
 url = {http://eclim2018.mitos.com.gr/},
}