Update and New Features of NTHU Flight Dose Calculator: A Tool for Estimating Aviation Route Doses and Cumulative Spectra of Cosmic Rays in Atmosphere

This paper presents a major improvement in the NTHU Flight Dose Calculator, which not only extends its capabilities but also introduces three new features: the automatic batch analysis of multiple flights, route dose summation over all scheduled flights, and estimation of the cumulative spectra of cosmic rays along a flight path. Based on the results of extensive FLUKA simulations of atmospheric showers generated by galactic cosmic rays, a global database containing energy spectra and effective dose rates of neutrons, protons, muons, pions, electrons, positrons, photons, and heavy ions at various altitudes ranging from sea level up to 70 km was constructed and parameterized accounting for the dependences of altitude, geomagnetic cutoff rigidity, and solar modulation. The dose calculator was revised to accommodate and utilize the newly expanded database, which enables the estimation of aviation route doses and cumulative spectra of various radiation components by performing a series of interpolations and integration along a path. A program is a user-friendly tool for assessing radiation exposure of air travel due to galactic cosmic rays. The new features of the batch processing and route dose summation greatly facilitate studies of flight route effects and individual dose monitoring of aircrew. The cumulative spectra of various components can provide additional information for in-depth dosimetry analyses, designing experiments for measuring related quantities, and estimating single-event effects in avionics.