Internal disruptions and RHF in IR-T1 tokamak
- I.A.U., Tehran (Iran, Islamic Republic of). Plasma Physics Research Center
Sawtooth oscillations are observed on IR-T1 Tokamak during low ql discharge with a disruption time of about 30--60 {micro}s. The q = 1 singular surface occurs at radius 3--3.5 cm and inverted Sawtooth from chords outside this radius. The superimposed (m = 1) oscillation with a frequency of about 19 kHz {approx} 25 kHz, according to the tokamak discharges parameters, preceding the Sawtooth oscillation. One major effect the Sawtooth oscillation is to flatten the temperature and density profiles approximately out to a mixing radius rm = {radical}2 rs,. Furthermore, by applying RHFs (L = 2 and L = 3), the Sawtooth behavior is modified. The magnitude of the weak RHFs used in the experiments did not exceed 1% of Bp. Results showed that the weak RHFs magnetic perturbation would change the MHD instabilities and the Sawtooth behavior, as well as plasma, confinement.
- OSTI ID:
- 423070
- Report Number(s):
- CONF-960634-; TRN: 97:002424
- Resource Relation:
- Conference: 1996 IEEE international conference on plasma science, Boston, MA (United States), 3-5 Jun 1996; Other Information: PBD: 1996; Related Information: Is Part Of IEEE conference record -- Abstracts: 1996 IEEE international conference on plasma science; PB: 324 p.
- Country of Publication:
- United States
- Language:
- English
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