WFRF:(Strait M.)
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| Fältnamn | Indikatorer | Metadata |
|---|---|---|
| 000 | 04820naa a2200577 4500 | |
| 001 | oai:research.chalmers.se:e1b7673f-9fc6-4982-a093-2e2d23b67ba6 | |
| 003 | SwePub | |
| 008 | 171006s2005 | |||||||||||000 ||eng| | |
| 024 | 7 | a https://research.chalmers.se/publication/1103852 URI |
| 024 | 7 | a https://doi.org/10.1088/0029-5515/45/12/0282 DOI |
| 040 | a (SwePub)cth | |
| 041 | a engb eng | |
| 042 | 9 SwePub | |
| 072 | 7 | a art2 swepub-publicationtype |
| 072 | 7 | a ref2 swepub-contenttype |
| 100 | 1 | a Okabayashi, M.u General Atomics,Princeton University4 aut |
| 245 | 1 0 | a Control of the resistive wall mode with internal coils in the DIII-D tokamak |
| 264 | c 2005-11-29 | |
| 264 | 1 | b IOP Publishing,c 2005 |
| 520 | a Internal coils, 'I-Coils', were installed inside the vacuum vessel of the DIII-D device to generate non-axisymmetric magnetic fields to act directly on the plasma. These fields are predicted to stabilize the resistive wall mode (RWM) branch of the long-wavelength external kink mode with plasma beta close to the ideal wall limit. Feedback using these I-Coils was found to be more effective as compared to using external coils located outside the vacuum vessel. Locating the coils inside the vessel allows for a faster response and the coil geometry also allows for better coupling to the helical mode structure. Initial results were reported previously (Strait E.J. et al 2004 Phys. Plasmas 11 2505). This paper reports on results from extended feedback stabilization operations, achieving plasma parameters up to the regime of Cβ ≈ 1.0 and open loop growth rates of γopenτw ≳ 25 where the RWM was predicted to be unstable with only the 'rotational viscous stabilization mechanism'. Here Cβ ≈ (β - βno-wall.limit)/(βideal.wall.limit - βno-wall.limit) is a measure of the beta relative to the stability limits without a wall and with a perfectly conducting wall, and τw is the resistive flux penetration time of the wall. These feedback experimental results clarified the processes of dynamic error field correction and direct RWM stabilization, both of which took place simultaneously during RWM feedback stabilization operation. MARS-F modelling provides a critical rotation velocity in reasonable agreement with the experiment and predicts that the growth rate increases rapidly as rotation decreases below the critical. The MARS-F code also predicted that for successful RWM magnetic feedback, the characteristic time of the power supply should be limited to a fraction of the growth time of the targeted RWM. The possibility of further improvements in the presently achievable range of operation of feedback gain values is also discussed. | |
| 650 | 7 | a TEKNIK OCH TEKNOLOGIERx Maskinteknik0 (SwePub)2032 hsv//swe |
| 650 | 7 | a ENGINEERING AND TECHNOLOGYx Mechanical Engineering0 (SwePub)2032 hsv//eng |
| 700 | 1 | a Bialek, J.u Columbia University in the City of New York4 aut |
| 700 | 1 | a Bondeson, Anders,d 1953u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)elfab |
| 700 | 1 | a Chance, M. S.u Princeton University4 aut |
| 700 | 1 | a Chu, M. S.u General Atomics4 aut |
| 700 | 1 | a Garofalo, A. M.u Columbia University in the City of New York4 aut |
| 700 | 1 | a Hatcher, R.u Princeton University4 aut |
| 700 | 1 | a In, Y.u FAR-TECH, Inc.4 aut |
| 700 | 1 | a Jackson, G. L.u General Atomics4 aut |
| 700 | 1 | a Jayakumar, R. J.u Lawrence Livermore National Laboratory4 aut |
| 700 | 1 | a Jensen, T. H.u General Atomics4 aut |
| 700 | 1 | a Katsuro-Hopkins, O.u Columbia University in the City of New York4 aut |
| 700 | 1 | a La Haye, R. J.u General Atomics4 aut |
| 700 | 1 | a Liu, Yueqiang,d 1971u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)elfliu |
| 700 | 1 | a Navratil, G. A.u Columbia University in the City of New York4 aut |
| 700 | 1 | a Reimerdes, H.u Columbia University in the City of New York4 aut |
| 700 | 1 | a Scoville, J. T.u General Atomics4 aut |
| 700 | 1 | a Strait, E. J.u General Atomics4 aut |
| 700 | 1 | a Takechi, M.u Japan Atomic Energy Agency4 aut |
| 700 | 1 | a Turnbull, A. D.u General Atomics4 aut |
| 700 | 1 | a Gohil, P.u General Atomics4 aut |
| 700 | 1 | a Kim, J. S.u Japan Atomic Energy Agency4 aut |
| 700 | 1 | a Makowski, M. A.u Lawrence Livermore National Laboratory4 aut |
| 700 | 1 | a Manickam, J.u Princeton University4 aut |
| 700 | 1 | a Menard, J.u Princeton University4 aut |
| 710 | 2 | a General Atomicsb Princeton University4 org |
| 773 | 0 | t Nuclear Fusiond : IOP Publishingg 45:12, s. 1715-1731q 45:12<1715-1731x 1741-4326x 0029-5515 |
| 856 | 4 | u http://dx.doi.org/10.1088/0029-5515/45/12/028y FULLTEXT |
| 856 | 4 8 | u https://research.chalmers.se/publication/110385 |
| 856 | 4 8 | u https://doi.org/10.1088/0029-5515/45/12/028 |
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