Diode array component associated with the proton/electron radiation experiment onboard Telstar 1, used to measure Van Allen Belt proton/electron distribution. Housed in a glass cylinder with metal endcaps (one marked "PN-79") and various ports, the piece measures approximately 24˝ long with a diameter of 3˝, and is accompanied by a wooden display stand. Also includes a group of 19 glass slides with images and schematics documenting this device and the Telstar 1. In overall fine condition.
From NASA's Space Science Data Coordinated Archive: 'Telstar 1, primarily a communications satellite, carried an experiment designed to measure the energetic proton and electron distribution in the Van Allen belts…Telstar 1 was launched on 10 July 1962, one day after the Starfish Prime high-altitude nuclear test. The test resulted in energetic charged particles forming an artificial radiation belt. This was encountered by Telstar 1, causing damage to the solar cells, transistors, and other electronic devices. This was the cause of the eventual failure of the spacecraft, as measured by instrumentation on the spacecraft specifically designed to measure radiation damage.'
