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Accession Number DE2013-1081845
Title Progress with Helicity Injection Current Drive.
Publication Date 2013
Media Count 6p
Personal Author B. A. Nelson D. A. Gates H. W. Kugel M. Bell P. Gu R. Bell R. Raman T. R. Jarboe V. A. Izzo W. T. Hamp
Abstract 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.
Keywords Beam injection
Current drive heating
Helicity
NSTX devices
Plasma waves
Reliability
Reproducibility
Toroidal configuration
Wall effects


 
Source Agency Technical Information Center Oak Ridge Tennessee
NTIS Subject Category 46G - Plasma Physics
77A - Thermonuclear Fusion Devices
Corporate Author Oak Ridge National Lab., TN.
Document Type Technical report
Title Note N/A
NTIS Issue Number 1323
Contract Number DE-AC05-00OR22725

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