Limiter H-mode experiments on TFTR
Creators
- Bush, C.E.1
- Bretz, N.L.2
- Fredrickson, E.D.2
- McGuire, K.M.2
- Nazikian, R.2
- Park, H.K.2
- Schivell, J.2
- Taylor, G.2
- Bitter, M.2
- Budny, R.2
- Cohen, S.A.2
- Kilpatrick, S.J.2
- LeBlanc, B.2
- Manos, D.M.2
- Meade, D.2
- Paul, S.F.2
- Scott, S.D.2
- Stratton, B.C.2
- Synakowski, E.J.2
- Towner, H.H.2
- Wieland, R.M.2
- Arunasalam, V.2
- Bateman, G.2
- Bell, M.G.2
- Bell, R.2
- Boivin, R.2
- Cavallo, A.2
- Cheng, C.Z.2
- Chu, T.K.2
- Cowley, S.2
- Davis, S.L.2
- Dimock, D.L.2
- Dylla, H.F.2
- Efthimion, P.C.2
- Ehrhardt, A.B.2
- Furth, H.P2
- Goldston, R.J.2
- Greene, G.2
- Grek, B.2
- Grisham, L.R.2
- Hammett, G.2
- Hawryluk, R.J.2
- Hill, K.W.2
- Hosea, J.2
- Hulse, R.A.2
- Husan, H.2
- Janos, A.2
- Jassby, D.L.2
- Jobes, F.C.2
- Johnson, D.W.2
- Johnson, L.C.2
- Kaita, R.2
- Kamperschroer, J.H2
- Kaye, S.2
- Kieras-Phillips, C.2
- Kugel, H.2
- LaMarche, P.H.2
- Mansfield, D.K.2
- Mazzucato, E.2
- McCarthy, M.P.2
- McCune, D.C.2
- Medley, S.S.2
- Mikkelsen, D.R.2
- Monticello, D.2
- Motley, R.2
- Mueller, D.2
- Murphy, J.2
- Owens, D.K.2
- Park, W.2
- Perkins, R.2
- Ramsey, A.T.2
- Redi, M.H.2
- Rewoldt, G.2
- Roquemore, A.L.2
- Rutherford, P.H.2
- Schilling, G.2
- Schmidt, G.L.2
- Stevens, J.2
- Stodiek, W.2
- Tang, W.2
- Terry, J.2
- Timberlake, J.R.2
- Ulrickson, M.2
- von Goeler, S.2
- Williams, M.2
- Wilson, J.R.2
- Wong, K.L.2
- Yamada, M.2
- Yoshikawa, S.2
- Young, K.M.2
- Zarnstorff, M.C.2
- Zweben, S.2
- Barnes, C.W.3
- Fonck, R.J.4
- Roberts, D.4
- Decaux, V.5
- Dooling, J.6
- Howell, R.B.7
- Kesner, J.7
- Snipes, J.7
- Kusama, Y.8
- Mauel, M.9
- Navratil, G.A.9
- Sabbagh, S.9
- Nagayama, Y.10
- Pitcher, S.11
- Princeton Univ., NJ (USA). Plasma Physics Lab
- 1. Oak Ridge National Lab., TN (USA)
- 2. Princeton Univ., NJ (USA). Plasma Physics Lab.
- 3. Los Alamos National Lab., NM (USA)
- 4. Wisconsin Univ., Madison, WI (USA)
- 5. College de France, 75 - Paris (France). Lab. de Physique Atomique et Moleculaire
- 6. Fusion Physics and Technologies, Torrance, CA (USA)
- 7. Massachusetts Inst. of Tech., Cambridge, MA (USA)
- 8. Japan Atomic Energy Research Inst., Naka, Ibaraki (Japan)
- 9. Columbia Univ., New York, NY (USA)
- 10. Tokyo Univ. (Japan)
- 11. Canadian Fusion Fuels Technology Project, Toronto, ON (Canada)
Description
Limiter H-modes with centrally peaked density profiles have been obtained in TFTR using a highly conditioned graphite limiter. The transition to these centrally peaked H-modes takes place from the supershot to the H-mode rather than the usual L- to H-mode transition observed on other tokamaks. Bidirectional beam heating is required to induce the transition. Density peaking factors, ne(0)/, greater than 2.3 are obtained and at the same time the H-mode characteristics are similar to those of limiter H-modes on other tokamaks, while the global confinement, τE, can be >2.5 times L-mode scaling. The transport analysis of the data shows that transport in these H-modes is similar to that of supershots within the inner 0.6 m core of the plasma, but the stored electron energy (calculated using measured values of Te and ne) is higher for the H-mode at the plasma edge. Microwave scattering data for the edge plasma shows broad spectra at k = 5.5 cm-1 which begin at the drop in Dα radiation and are strongly shifted in the electron diamagnetic drift direction. At the same time, beam emission spectroscopy (BES) shows a coherent mode near the boundary which propagates in the ion direction with m = 15--20 at 20--30 kHz. During the ELM event these apparent rotations cease and Mirnov fluctuations in the frequency range of 50--500 kHz increase in intensity. 16 refs., 8 figs
Availability note (English)
MF available from INIS under the Report Number; OSTI as DE91012309; NTIS; INIS; US Govt. Printing Office Dep.Files
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Additional details
Publishing Information
- Imprint Pagination
- 21 p.
- Report number
- PPPL--2743
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 22082048
- Subject category
- S70: PLASMA PHYSICS AND FUSION TECHNOLOGY; S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
- Descriptors DEI
- BEAM INJECTION HEATING; CONFINEMENT TIME; FLUCTUATIONS; GRAPHITE; H-MODE PLASMA CONFINEMENT; LIMITERS; MAGNETIC FIELDS; TFTR TOKAMAK
- Descriptors DEC
- CARBON; CLOSED PLASMA DEVICES; CONFINEMENT; ELEMENTS; HEATING; NONMETALS; PLASMA CONFINEMENT; PLASMA HEATING; THERMONUCLEAR DEVICES; TOKAMAK DEVICES; VARIATIONS
Optional Information
- Contract/Grant/Project number
- Contract AC02-76CH03073
- Funding organization
- USDOE, Washington, DC (USA).