Novel current drive experiments on the CDX-U, HIT, and DIII-D Tokamaks
Conference
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OSTI ID:10187685
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- Princeton Univ., NJ (United States). Plasma Physics Lab.
- Washington Univ., Seattle, WA (United States)
- General Atomics, San Diego, CA (United States)
Two types of novel, non-inductive current drive concepts for starting-up and maintaining tokamak discharges have been developed on the CDX-U, HIT, and DIII-D Tokamaks. On CDX-U, a new, non-inductive current drive technique utilizing fully internally generated pressure driven currents has been demonstrated. The measured current density profile shows a non-hollow profile which agrees with a modeling calculation including helicity conserving non-classical current transport providing the ``seed current``. Another current drive concept, dc-helicity injection, has been investigated on, CDX-U, HIT and DIII-D. This method utilizes injection of magnetic helicity via low energy electron currents, maintaining the plasma current through helicity conserving relaxiation. In these experiments, non-ohmic tokamak plasmas were formed and maintained in the tens of kA range.
- Research Organization:
- Princeton Univ., NJ (United States). Plasma Physics Lab.
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC02-76CH03073; FG06-90ER54095; AC03-89ER51114
- OSTI ID:
- 10187685
- Report Number(s):
- PPPL-CFP--2756; CONF-920913--17; IAEA-CN--56/E-2-5; ON: DE93002102
- Country of Publication:
- United States
- Language:
- English
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