Academic Journal
Mode conversion electron heating in Alcator C-Mod: Theory and experiment
| العنوان: | Mode conversion electron heating in Alcator C-Mod: Theory and experiment |
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| المؤلفون: | Bonoli, PT, Brambilla, M, Nelson-Melby, E, Phillips, CK, Porkolab, M, Schilling, G, Taylor, G, Wukitch, SJ, Boivin, RL, Boswell, CJ, Fiore, CL, Gangadhara, S, Goetz, J, Granetz, R, Greenwald, M, Hubbard, AE, Hutchinson, IH, In, Yongkyoon, Irby, J, LaBombard, B, Lipschultz, B, Marmar, E, Mazurenko, A, Nachtrieb, R, Pappas, D, Pitcher, CS, Reardon, J, Rice, J, Rowan, WL, Snipes, JA, Takase, Y, Terry, J, Wolfe, SM |
| بيانات النشر: | AMER INST PHYSICS |
| سنة النشر: | 2000 |
| المجموعة: | ScholarWorks@UNIST (Ulsan National Institute of Science and Technology) |
| الوصف: | Localized electron heating [full width at half maximum of Delta(r/a) approximate to 0.2] by mode converted ion Bernstein waves (IBW) has been observed in the Alcator C-Mod tokamak [I. H. Hutchinson , Phys. Plasmas 1, 1511 (1994)]. These experiments were performed in D(He-3) plasmas at high magnetic field (B-0 = 7.9 T), high-plasma density (n(e0) greater than or equal to 1.5 x 10(20) m(-3)), and for 0.05 less than or equal to n(He-3)/n(e) less than or equal to 0.30. Electron heating profiles of the mode converted IBW were measured using a break in slope analysis of the electron temperature versus time in the presence of rf (radio frequency) modulation. The peak position of electron heating was found to be well-correlated with He-3 concentration, in agreement with the predictions of cold plasma theory. Recently, a toroidal full-wave ion cyclotron range of frequencies (ICRF) code TORIC [M. Brambilla, Nucl. Fusion 38, 1805 (1998)] was modified to include the effects of IBW electron Landau damping at (k(perpendicular to)rho(i))(2) much greater than 1, This model was used in combination with a 1D (one-dimensional) integral wave equation code METS [D. N. Smithe et al., Radio Frequency Power in Plasmas, AIP Conf. Proc. 403 (1997), p. 367] to analyze these experiments. Model predictions were found to be in qualitative and in some instances quantitative agreement with experimental measurements. A model for mode conversion current drive (MCCD) has also been developed which combines a toroidal full wave code with an adjoint evaluation of the ICRF current drive efficiency. Predictions for off-axis MCCD in C-Mod have been made using this model and will be described. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 1070-664X |
| Relation: | PHYSICS OF PLASMAS, v.7, no.5, pp.1886 - 1893; https://scholarworks.unist.ac.kr/handle/201301/23797; 3634; 29946; 2-s2.0-0006829772; 000086511000035 |
| DOI: | 10.1063/1.874012 |
| الاتاحة: | https://scholarworks.unist.ac.kr/handle/201301/23797 http://aip.scitation.org/doi/10.1063/1.874012 https://doi.org/10.1063/1.874012 |
| رقم الانضمام: | edsbas.5F313BE4 |
| قاعدة البيانات: | BASE |
| تدمد: | 1070664X |
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| DOI: | 10.1063/1.874012 |