HHFW Power Flow Along Magnetic Field Lines In The Scrape-off Layer of NSTX

Technical Report · Mon Feb 27 00:00:00 EST 2012

DOI:https://doi.org/10.2172/1063130· OSTI ID:1063130

Rory Perkins, et al

A significant fraction of high-harmonic fast-wave (HHFW) power applied to NSTX can be lost to the scrape-off layer (SOL) and deposited in bright and hot spirals on the divertor rather than in the core plasma. We show that the HHFW power flows to these spirals along magnetic field lines passing through the SOL in front of the antenna, implying that the HHFW power couples across the entire width of the SOL rather than mostly at the antenna face. This result will help guide future efforts to understand and minimize these edge losses in order to maximize fast wave heating and current drive.

• Research Organization: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES)
• DOE Contract Number: DE-ACO2-09CH11466
• OSTI ID: 1063130
• Report Number(s): PPPL-4737
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Tokamaks
RF Heating
Scrape-off Layer