Charles Karney: Publication 56/85, Taylor(1989)

G. Taylor, C. W. Barnes, B. J. Braams, A. J. Cavallo, P. C. Efthimion, C. F. F. Karney, S. Tamor, M. C. Zarnstorff, and S. J. Zweben.
Non-thermal electron cyclotron emission from TFTR supershot plasmas.
In S. Segre, H. Knoepfel, and E. Sindoni, editors, Controlled Fusion and Plasma Physics, volume 13B, part I of Europhysics Conference Abstracts, pages 31–34, European Physical Society, 1989.
Sixteenth European Conf., Venice, Italy, Mar. 13–17 1989, paper P2-A1-2.
BibTeX Entry

The Ohmic targets of Supershot plasmas in the Tokamak Fusion Test Reactor (TFTR) are often characterized by the presence of non-thermal electron cyclotron emission(ECE) from a runaway or slideaway electron population. However in the 100–150 msec after the start of neutral beam injection (NBI) this non-thermal ECE decays away as the electron density rises and the loop voltage drops. After this usual slideaway-induced, non-thermal ECE is quenched a new non-thermal feature develops at frequencies just below both the optically thick, thermal emission of the ECE fundamental ordinary mode, and the second harmonic extraordinary mode. This paper presents an analysis of the ECE data which indicates a possible source of this non-thermal emission feature. In addition, correlation of the peak intensity of the non-thermal feature with various plasma parameters for 130 TFTR discharges from 1988 provides some clues toward identifying possible physical conditions which give rise to the feature.