title: Compact cosmic ray detector for unattended atmospheric ionization monitoring.
abstract: Two vertical cosmic ray telescopes for atmospheric cosmic ray ionization event detection are compared. Counter A, designed for low power remote use, was deployed in the Welsh mountains; its event rate increased with altitude as expected from atmospheric cosmic ray absorption. Independently, Counter B's event rate was found to vary with incoming particle acceptance angle. Simultaneous co-located comparison of both telescopes exposed to atmospheric ionization showed a linear relationship between their event rates.
authors.affiliation: Department of Physics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, United Kingdom. k.aplin1@physics.ox.ac.uk
authors.forename: K L
authors.initials: KL
authors.lastname: Aplin
authors.forename: R G
authors.initials: RG
authors.lastname: Harrison