[en] The physics of the High-GAMMA mode of MFTF-α+T operation is described. A brief description of the physics models which have been incorporated in the TMRBAR code is presented. A comparison of the reference parameters with those obtained from the updated model is given. This comparison serves to benchmark the new model. Using the updated baseline parameter set as a starting point, limited parametrics over those quantities which seem to have the greatest effect on the test cell performance are presented. These studies were then used to obtain the partially optimized set of operating parameters. Conclusions and areas for future work are presented