DESIGN AND ANALYSIS OF A NOVEL, ULTRA-LIGHT, CRYOGENIC DEWAR FOR BALLOON-BORNE OBSERVATORIES

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dc.contributor.advisordiMarzo, Marinoen_US
dc.contributor.authorDenker, Samuelen_US
dc.contributor.departmentMechanical Engineeringen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2020-10-08T05:33:40Z
dc.date.available2020-10-08T05:33:40Z
dc.date.issued2020en_US
dc.description.abstractThe deployment of cryogenic Dewars aboard high-altitude balloons is critical to astronomical observation at submillimeter wavelengths. Balloon-borne, cryogenically cooled telescopes are limited in size by weight restrictions of the balloons, which is dominated by the Dewars. This thesis presents a portion of the multi-phase BOBCAT project which reduces Dewar weight with the use of thin-walled designs and a novel multi-layer insulation (MLI) system. The BOBCAT-1 mission used conventional Dewar technology to demonstrate cryogen transfer at float altitude and establish baseline thermal performance of balloon-borne Dewars. Design and assembly of the BOBCAT-2 ultra-light Dewar showed successful fabrication of the thin-walled vessel and novel MLI system. Thermal modelling predicts that the BOBCAT-2 Dewar will experience an order of magnitude increase in heat transfer through the MLI, equivalent to a 60% increase through the Dewar in total, due to its larger volume and decreased number of radiation shields relative to the BOBCAT-1 Dewar.en_US
dc.identifierhttps://doi.org/10.13016/q3rw-mkfh
dc.identifier.urihttp://hdl.handle.net/1903/26541
dc.language.isoenen_US
dc.subject.pqcontrolledMechanical engineeringen_US
dc.subject.pquncontrolledCryogenicsen_US
dc.subject.pquncontrolledHeat Transferen_US
dc.subject.pquncontrolledHigh-altitude balloonen_US
dc.titleDESIGN AND ANALYSIS OF A NOVEL, ULTRA-LIGHT, CRYOGENIC DEWAR FOR BALLOON-BORNE OBSERVATORIESen_US
dc.typeThesisen_US

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