  In order to evaluate the response to cosmic-ray nuclei of a Compton-Scatter
Transition Radiation Detector in the proposed ACCESS space-based mission, a
hybrid Monte Carlo simulation using GEANT3 and an external transition radiation
(TR) generator routine was constructed. This simulation was employed to study
the effects of delta-ray production induced by high-energy nuclei and to
maximize the ratio of TR to delta-ray background. The results demonstrate the
ability of a Compton-Scatter Transition Radiation Detector to measure nuclei
from boron to iron up to Lorentz factors ~ 10^5 taking into account the steeply
falling power-law cosmic ray spectra.
