Image: Voyager Program - RTG diagram 1

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Description: Diagram of the Inner Heat Source Unit (shown in packed form), the central part of the three Radioisotope Thermoelectric Generators (RTGs), included on the Voyager 1 and Voyager 2 spacecraft. It contains 24 pressed plutonium-238 oxide spheres, generating about 2400 Watts of thermal power at launch time - which is the decay heat of the plutonium. Outside are placed are 312 silicon-germanium (SiGe) thermoelectric couples, which are used to produce about 470 watts of electric power (at launch time), the remainder being dissipated as waste heat.
Title: Voyager Program - RTG diagram 1
Credit: "Diagram: Heat Source for Radioisotope Thermoelectric Generator", Voyager Bulletin, no. 13, Link
Author: NASA/JPL
Usage Terms: Public domain
License: Public domain
Attribution Required?: No

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