INVESTIGATION OF RESISTIVE GEODESIC ACOUSTIC MODE IN THE EDGE OF STOR-M TOKAMAK

A new resistive Geodesic Acoustic Mode (GAM) theory is developed by two-fluids analysis and resistive gyro-kinetic formulation in this thesis. An analytical expression is obtained for the resistive GAM frequency. This theory suggests a large collision frequency will prohibit the parallel current in tokamak, which establishes the cross-field charge neutrality condition ∇·J⊥= 0 for the existence of GAM at the edge plasma of tokamak. Therefore, the resistive GAM theory provides a more plausible explanation to edge GAM phenomena. Various probe arrays are designed and installed in the STOR-M tokamak to search for the poloidal GAM phenomena. A series of experiments were conducted in the L-mode and RMP discharges. The FFT and wavelet analyses indicate the existence of GAM phenomena in STOR-M, and the observed GAM frequencies match the theoretical predication using the resistive GAM model.

Name thesis:degree_name

Master of Science (M.Sc.)

Level thesis:degree_level

Masters

Discipline thesis:degree_discipline

Physics

Grantor

University of Saskatchewan

Year dc:date.issued

2013

Author dc:creator

• Ding, Yue

Advisor dc:contributor.advisor

• Hirose, Akira

Committee members dc:contributor.committeemember

• Xiao, Chijin
• Ghezelbash, Masoud
• Merriam, Jim
• Smolyakov, Andrei

• Geodesic Acoustic Mode
• resistive
• plasma
• STOR-M

Language dc:language.iso

eng

Handle dc:identifier.uri

https://hdl.handle.net/10388/ETD-2012-01-896

OAI identifier oai:identifier

oai:harvest.usask.ca:10388/ETD-2012-01-896