Overview of results from the ATF torsatron
Creators
- Colchin, R.J.1
- Murakami, M.1
- Anabitarte, E.1
- Anderson, F.S.B.1
- Bell, G.L.1
- Bell, J.D.1
- Bigelow, T.S.1
- Crume, E.C.1
- Dunlap, J.L.1
- Dyer, G.R.1
- England, A.C.1
- Fisher, P.W.1
- Gabbard, W.A.1
- Glowienka, J.C.1
- Goulding, R.H.1
- Halliwell, J.W.1
- Hanson, G.R.1
- Harris, J.H.1
- Haste, G.R.1
- Hidalgo-Vera, C.1
- Hillis, D.L.1
- Hiroe, S.1
- Horton, L.D.1
- Howe, H.C.1
- Hutchinson, D.P.1
- Isler, R.C.1
- Jernigan, T.C.1
- Kwon, M.1
- Langley, R.A.1
- Lee, D.K.1
- Lyon, J.F.1
- Lue, J.W.1
- Ma, C.H.1
- Menon, M.M.1
- Morris, R.N.1
- Mioduszewski, P.K.1
- Neilson, G.H.1
- Qualls, A.L.1
- Rasmussen, D.A.1
- Rogers, P.S.1
- Shaw, P.L.1
- Shepard, T.D.1
- Simpkins, J.E.1
- Sudo, S.1
- Thomas, C.E.1
- Uckan, T.1
- Wade, M.R.1
- Wilgen, J.B.1
- Wing, W.R.1
- Yamada, H.1
- Zielinski, J.J.1
- 1. Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-8072 (USA)
Description
Experiments involving plasma improvement, confinement scaling, bootstrap currents, and edge fluctuations have been carried out in the Advanced Toroidal Facility (ATF) torsatron [Fusion Technol. 10, 179 (1986)]. Average densities bar ne≤9x1019 m-3 have been obtained, with global energy confinement times τ*E≤20 msec. Confinement times generally follow the stellarator/torsatron empirical scaling law, τSL =0.17xP-0.58n0.69eB0.84a2R0.75 (with τSL in seconds, power P in megawatts, density ne in 1020 m-3, and plasma radius a and major radius R in meters). Gas injection during neutral beam injection (NBI) causes increases in ne, so that τ*E does not decrease during NBI. Edge plasma fluctuations are found to exhibit a mode change near the peak of the energy confinement time. Plasma currents observed during electron cyclotron heating have been identified as bootstrap currents
Additional details
Publishing Information
- Journal Title
- Physics of Fluids B
- Journal Volume
- 2
- Journal Issue
- 6
- Series
- Phys. Fluids B.
- Journal Page Range
- 1347-1352
- ISSN
- 0899-8221
- CODEN
- PFBPE
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 21073342
- Subject category
- S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
- Descriptors DEI
- ATF TORSATRON; BOOTSTRAP CURRENT; END EFFECTS; FLUCTUATIONS; GAS INJECTION; ICR HEATING; NEUTRAL ATOM BEAM INJECTION; OSCILLATION MODES; PLASMA CONFINEMENT; SCALING LAWS
- Descriptors DEC
- BEAM INJECTION; CLOSED PLASMA DEVICES; CONFINEMENT; CURRENTS; ELECTRIC CURRENTS; FLUID INJECTION; HEATING; HIGH-FREQUENCY HEATING; PLASMA HEATING; STELLARATORS; THERMONUCLEAR DEVICES; TORSATRON STELLARATOR; VARIATIONS