The Voyager Cosmic Ray Experiment

The Voyager Cosmic Ray Experiment includes seven dE/dx-E telescopes to measure the energy and charge of particles of 1 ¿ Z ¿ 26 in the energy range 1-500 MeV/ nucleon and to measure electron energy in the range 3 ¿ Ee¿ 110 MeV. Isotopic composition of hydrogen through sulfur in the range up to 75 MeV/nucleon can also be resolved. The electronic systems include a dual-gain, charge sensitive preamplifier, 4096-channel pulse height analyzers for three parameter analysis of selected events, and an event type readout polling scheme to maximize the use of available telemetry space and to enhance the occurrence of rare events in the data. Details of the detector, electronic and mechanical design are presented.