Orbital effects on pitch angle diffusion of injected fast-ion beams in tokamaks
Name
61103442-MIT.pdf
Description
Full printable version
Size
1.74 MB
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Adobe PDF
Checksum (MD5)
5688bbf3662ea43ab4527ddfa3152f1c
Author(s)
Wleklinski, Joseph J., 1974-
Advisor(s)
Jan Egedal.
Date Issued
2005
Publisher
Massachusetts Institute of Technology
Abstract
The effects of ion orbits on pitch angle scattering of fast ion beam injection are investigated here for the magnetic equilibrium of the ITER tokamak. Two methods are used to calculate distributions in the presence of orbits, one applying boundary conditions a posteriori and one a priori. In both cases an orbit average of the Fokker-Planck equation is taken, yielding a solution in velocity space variables velocity and pitch angle. In the first case, conditions in the form of a linear combination of co, counter, and trapped distributions or fluxes are matched at the orbit transition value of pitch angle so that several distributions combine to form a solution. In the second case, an overall distribution is found which obeys boundary conditions derived from the trapped and passing regime essential behavior. Ultimately, both methods yield distributions which are essentially equivalent in character.
Description
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2005.
Includes bibliographical references (leaf 25).
Subjects
Mechanical Engineering.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
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