[en] In the past year, the range of experimental situations to which TORAY, our ECH ray tracing, heating and current-drive code, can be applied has been significantly broadened, and electron cyclotron heating and current-drive experiments on existing and planned tokamaks have been modeled. Also TORAY has been used in the design of several ECE diagnostics. The number of users of TORAY continues to increase. A version of TORAY, called TORCH, is now run under the BASIS operating system. While this form of the code is not easily transferred to other computers, it does have the advantage of allowing easier scanning of parameter space in searching for the optimization desired in a particular experiment. Another problem on which our work focussed is determining the sensitivity of transient synchrotron radiation to tokamak plasma parameters. The goal of this work is to examine the conditions under which incremental synchrotron radiation can be used as a diagnostic to determine values of plasma parameters such as Z/sub Eff/ and q-profile as well as a diagnostic to determine the response of the plasma to rf-perturbations. 11 refs