EFFECT OF BROAD-BAND WAVE-NUMBER AND FREQUENCY-SPECTRA ON EXB PARTICLE-FLUX IN PLASMAS

The effect of a broadband wave number (k) and frequency (omega) spectr um S(k, omega), on particle flux due to electrostatic fluctuations in a plasma is examined. Effect of the broadband spectrum on density-pote ntial coherence is also calculated. Particle flux results are compared with a standard quasilinear transport estimate that has been used to interpret heavy ion beam probe and Langmuir probe measurements in fusi on plasmas. Situations in which the quasilinear estimate is probably i naccurate are illustrated, including edge shear layer measurements and interior measurements from the TEXT tokamak. (C) 1997 American Instit ute of Physics.