Spark Chamber and Magnet System for Photographing Cosmic‐Ray Tracks at Balloon Altitudes

Abstract

A spark chamber system, consisting of five spark chambers and a deflection magnet, is used to photograph tracks of cosmic‐ray electrons at 130 000 feet. Four trajectory spark chambers display the deflected particle track from which particle energy and sign may be determined for magnetic rigidities up to about 2 BV. A tantalum plate spark chamber at the exit detects electrons by production of cascade showers.