Progress with Helicity Injection Current Drive

Conference · Tue Jan 01 04:00:00 EST 2002

OSTI ID:1081845

Jarboe, T. ^[1]; Peng, Yueng Kay Martin ^[2]

---

1. University of Washington, Seattle
2. ORNL

Coaxial Helicity Injection (CHI) experiments in the NSTX and HIT II devices are reported. NSTX has produced toroidal currents of 0.4 MA and pulse lengths of up to 0.33 s. These discharges nearly fill the NSTX main chamber, and show the n=1 rotating distortion characteristic of high-performance CHI plasmas. CHI has been used in HIT II to provide a closed flux startup plasma for inductive drive. The CHI startup method saves transformer volt-seconds and greatly improves reproducibility and reliability of inductively driven discharges, even in the presence of diminishing wall conditions.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1081845
• Country of Publication: United States
• Language: English