Abstract
Several techniques for determining the level and characteristics of electron temperature fluctuations via measurements and analysis of electron cyclotron emission (ECE) have recently been proposed and demonstrated [S. Sattler and H. J. Hartfuss, Plasma Phys. Cont. Fus. 35, 1285 (1993) and G. Cima et al., Phys. Plasmas (1994)]. A technique relying on the correlation of ECE in orthogonal frequency bins but lying within the line broadening of the local emission spectrum is being pursued at DIII-D. Special concerns include the effect of large rotation in the discharges due to neutral beam injection and extremely low fluctuation levels in enhanced confinement regimes such as negative central shear discharges. An antenna design optimized for fluctuation studies is also being developed.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
