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Identifier

000406790

Title

Κρουστικά κύματα σε μαγνητισμένο πλάσμα σύντηξης

Alternative Title

Shock waves in magnetised fusion plasma

Author

Μπουρνέλης, Θεόδωρος Α.

Thesis advisor

Τάσσης, Κωνσταντίνος

Reviewer

Λαλούσης, Παρασκευάς
Μουσταϊζής, Σταύρος

Abstract

This thesis is dedicated to the numerical study of shock waves in thermonuclear plasma. We briefly discuss the nuclear reactions relevant to fusion, and the nuclear reaction rates which we implement in our numerical codes. We present the mathematical description of the plasma, which is based on the two-fluid and Magnetohydrodynamic approximations. The fluid equations for the various plasma species are derived from Boltzmann’s equation. These system of fluid equations coupled with Maxwell’s equations are numerically solved using a finite volume method in space and Runge-Kutta in time. The numerical results presented in this thesis consist of two parts. In the first part we present numerical results on the shock waves in plasma, in Cartesian and Cylindrical geometries, with and without magnetic fields. A comparison on the numerical results obtained by the two approximations, Magnetohydrodynamic(MHD) and multi-fluid approximations, is presented. In the second part we implement the alpha particles generated by nuclear reactions as an additional fluid to our multi-fluid approximation of the plasma. We present numerical results on the production of the alpha particles,for plasmas relevant to magnetic fusion and to inertial fusion. and study the the effect that the magnetic field has on the alphas. Finally we present conclusions on this numerical study, and give directions for possible continuation of this work.

Language

Greek

Subject

A-Reactions

Inertial fusion

Magnetic fusion

Nuclear fusion

Αδρανειακή σύντηξη

Αντιδράσεις-Α

Μαγνητική σύντηξη

Πυρηνική σύντηξη

Issue date