* University of Siegen, Department of Physics, Adolf-Reichwein-Str.2, 57076, Siegen, Germany
** DLR Institute of Aerospace Medicine, Radiobiology Section, 51140, Köln, Germany
Abstract:
Three stacks of CR-39 plastic nuclear track detectors were exposed to cosmic radiation during IML-1 mission. They were mounted with their axes parallel to the shuttle's axes to allow measurements of LET-spectra for different impinging directions. First results of this experiment are reported.