Observation of the H-mode in ohmically heated divertor discharges on DIII-D
- 1 October 1990
- journal article
- Published by IOP Publishing in Nuclear Fusion
- Vol. 30 (10) , 2023-2028
- https://doi.org/10.1088/0029-5515/30/10/004
Abstract
On DIII-D, periods of improved particle and energy confinement have been observed in low q, low BT divertor discharges with Ohmic heating alone. The Ohmic H-mode has characteristics similar to those of the H-mode produced by auxiliary heating. In the Ohmic H-mode the energy confinement time can have values near those predicted by Neo-ALCATOR scaling and a factor of two above those of non-H-mode Ohmic discharges at similar densities. These observations indicate that the H-mode is not limited to an improvement in confinement over that of the L-mode in auxiliary heating discharges.Keywords
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