Balloon-Borne Instrumentation for Neutron Detection

Abstract

A description is given of balloon‐borne proportional counters and circuitry for telemetering and recording cosmic‐ray neutron intensities. The preamplifier, amplifier, scaler, and trigger circuit described all use low drain directly heated battery‐type tubes. Methods and reasons for pressurization of high voltage circuits are discussed. Included is a description of a multiple‐level flight technique using single large plastic balloons for long time intervals at pre‐set altitudes.