Year-end Sale % OFF 
Abstract
The world's largest capacity helium flight dewar has been assembled for use on the Relativity Mission, also known as Gravity Probe-B (GP-B). Acceptance tests performed include (1) weight, (2) proof pressure and leak checks, (3) vacuum bakeout, (4) main tank fill with He I, (5) parasitic heat rate tests, (6) well fill with He I from both the main tank and an external supply dewar, (7) well depletion, (8) conditioning the main tank to He II, (9) porous plug tests, (10) heat pulse meter tests, (11) transferring He II from the main tank to the well with a fountain-effect pump, (12) guard tank fill with He I with a nonvented He II main tank simulating launch pad hold, and (13) guard tank emptying. The measured performance is compared to the previously launched IRAS, COBE, and ISO cryostats. The Relativity Mission spacecraft will be launched in the time span 1999 to 2000.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
