LET: Linear Energy Transfer Spectra

Overview

LET outputs differential and/or integral LET spectra from a range of elements. Unlike SPEC, which simply tabulates the results of its subroutines, LET must reparameterize the fluxes. Using stopping power functions, LET transforms the energy spectra into LET spectra.

Inputs

• Name(s) of output file(s)
• Number of data points in output file(s)
• The range of atomic numbers of the elements to be included
• The year
• Whether to include geomagnetic cutoff and trapped protons
• The interplanetary weather index
• The thickness of material shielding.

Outputs

The output files of LET have the same format as those of SPEC, but with different units: differential flux in particles/(m²-ster-sec)/(MeV-cm²/g) or integral flux in particles/(m²-ster-sec); versus LET in MeV-cm²/g.