{"paper":{"title":"The Thermal Design, Characterization, and Performance of the SPIDER Long-Duration Balloon Cryostat","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","physics.ins-det"],"primary_cat":"astro-ph.IM","authors_text":"A. A. Fraisse, A. D. Turner, A. Gambrel, A. S. Rahlin, A. Trangsrud, B. P. Crill, C. B. Netterfield, C. D. Reintsema, C. J. MacTavish, C. R. Contaldi, C. Tucker, D. V. Wiebe, E. Young, G. C. Hilton, H. C. Chiang, J. A. Shariff, J. D. Soler, J. E. Gudmundsson, J. E. Ruhl, J. J. Bock, J. M. Nagy, J. P. Filippini, J. R. Bond, K. D. Irwin, K. Megerian, L. Moncelsi, M. Amiri, M. C. Runyan, M. Halpern, M. Hasselfield, N. N. Gandilo, O. Dor\\'e, P. A. R. Ade, P. V. Mason, R. S. Tucker, S. A. Bryan, S. J. Benton, T. A. Morford, T. E. Montroy, V. V. Hristov, W. C. Jones, W. Holmes, Z. Kermish","submitted_at":"2015-06-23T11:37:00Z","abstract_excerpt":"We describe the SPIDER flight cryostat, which is designed to cool six millimeter-wavelength telescopes during an Antarctic long-duration balloon flight. The cryostat, one of the largest to have flown on a stratospheric payload, uses liquid helium-4 to deliver cooling power to stages at 4.2 and 1.6 K. Stainless steel capillaries facilitate a high flow impedance connection between the main liquid helium tank and a smaller superfluid tank, allowing the latter to operate at 1.6 K as long as there is liquid in the 4.2 K main tank. Each telescope houses a closed cycle helium-3 adsorption refrigerato"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1506.06953","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}