valve with 649°C at 1700 kPa rating was used for processing the working fluid and the inert gas. All the heat pipe parts were cleaned as per standard cleaning procedure before assembly and welding. The pipe was vacuum baked at 900°C and 10~7 Torr for 6 hours before loading the working fluid by gravity aided vacuum transfer. Table I summarizes the design details of this test article. A comprehensive description of the design can be found in the dissertation report [4].
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