Numerical simulation of electron cyclotron emission and absorption in tokamak plasmas during LH current drive experiments

The feasibility of diagnosing the high energy electron tails driven by lower hybrid waves in tokamak plasmas during lower hybrid current drive experiments is investigated by computing the electron cyclotron emission and absorption spectra which could be measured both along lines of constant magnetic field and along the usual line of sight parallel to the horizontal midplane, making use of a model electron distribution function. A toroidal ray tracing code was used. (AIP)