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dc.contributor.advisorXiao, Chijinen_US
dc.creatorElgriw, Sayfen_US
dc.date.accessioned2014-05-28T12:00:22Z
dc.date.available2014-05-28T12:00:22Z
dc.date.created2014-04en_US
dc.date.issued2014-05-27en_US
dc.date.submittedApril 2014en_US
dc.identifier.urihttp://hdl.handle.net/10388/ETD-2014-04-1539en_US
dc.description.abstractStudies of resonant magnetic perturbations (RMP) have been an active topic in the tokamak research. The RMP technique involves the use of magnetic perturbations generated by external coils installed on a tokamak device. The resonant interaction between the plasma and RMP has favorable effects on magnetohydrodynamic (MHD) stability and other plasma parameters in tokamaks. The RMP experiments are carried out in the Saskatchewan Torus-Modified (STOR-M) tokamak using (l = 2, n = 1) helical coils carrying a static current pulse. The effect of RMP on the (m = 2, n = 1) magnetic islands is examined during ohmic discharges with high MHD activities. The amplitude and frequency of (2, 1) Mirnov fluctuations are significantly reduced after application of RMP. A phase of improved plasma confinement, characterized by a reduction in the H_alpha emission level and an increase in the soft x-ray (SXR) emission, is induced after application of RMP. It is also observed using the ion Doppler spectroscopy (IDS) that RMP can strongly affect the plasma rotation in STOR-M. It is found that during the RMP pulse, the toroidal velocity of C_III impurities (located at the plasma edge) increases in the co-current direction. However, the toroidal velocities of O_V and C_VI impurities (located near the plasma core) change direction from counter-current to co-current. The reduction of the toroidal flow velocity is accompanied by a reduction of the MHD frequency. It is also found that radial profiles of ion saturation current and floating potential in the edge region can be modified by RMP. An increase in the pedestal plasma density and a more negative electric field are observed at the plasma edge region during the RMP pulse. An internal probe array is assembled and installed in STOR-M to study the RMP penetration and the plasma response to RMP.en_US
dc.language.isoengen_US
dc.subjectSTOR-M Tokamaken_US
dc.subjectResonant Magnetic Perturbationsen_US
dc.subjectMHD Instabilitiesen_US
dc.subjectMagnetic Islandsen_US
dc.subjectPlasma Flow Measurementsen_US
dc.titleEffects of Resonant Magnetic Perturbations on the STOR-M Tokamak Dischargesen_US
thesis.degree.departmentPhysics and Engineering Physicsen_US
thesis.degree.disciplinePhysicsen_US
thesis.degree.grantorUniversity of Saskatchewanen_US
thesis.degree.levelDoctoralen_US
thesis.degree.nameDoctor of Philosophy (Ph.D.)en_US
dc.type.materialtexten_US
dc.type.genreThesisen_US
dc.contributor.committeeMemberHirose, Akiraen_US
dc.contributor.committeeMemberSmolyakov, Andreien_US
dc.contributor.committeeMemberKasap, Safaen_US
dc.contributor.committeeMemberChapman, Bretten_US
dc.contributor.committeeMemberMoewes, Alexen_US


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