Expected acceptance of the KLYPVE/K-EUSO space-based mission for the observation of ultra-high energy cosmic rays

KLYPVE/K-EUSO is a space-based observatory of ultra-high energy cosmic rays on the international space station to study anisotropy with higher statistics. The collaborative work has begun in 2013 between the original KLYPVE collaboration and the JEM-EUSO collaboration to utilize the lens technology developed for JEM-EUSO in the KLYPVE mission. The baseline optics of KLYPVE/K-EUSO consists of a mirror, a corrective Fresnel lens and a focal surface detector. The full acceptance will be about twice larger than that of Pierre Auger Observatory, and about 20% of JEM-EUSO’s. The trigger threshold energy of KLYPVE/K-EUSO was found to be possibly twice lower than that of JEM-EUSO.