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Thermal architecture for the SPIDER flight cryostat | | J.E. Gudmundsson
; P.A.R. Ade
; M. Amiri
; S.J. Benton
; R. Bihary
; J.J. Bock
; J.R. Bond
; J.A. Bonetti
; S.A. Bryan
; H.C. Chiang
; C.R. Contaldi
; B.P. Crill
; D. O'Dea
; M. Farhang
; J.P. Filippini
; L.M. Fissel
; N.N. Gandilo
; S.R. Golwala
; M. Halpern
; M. Hasselfield
; K.R. Helson
; G. Hilton
; W. Holmes
; V.V. Hristov
; K.D. Irwin
; W.C. Jones
; C.L. Kuo
; C.J. MacTavish
; P.V. Mason
; T.E. Montroy
; T.A. Morford
; C.B. Netterfield
; A.S. Rahlin
; C.D. Reintsema
; J.E. Ruhl
; M.C. Runyan
; M.A. Schenker
; J.A. Shariff
; J.D. Soler
; A. Trangsrud
; C. Tucker
; R.S. Tucker
; A.D. Turner
; | | Date: |
13 Jun 2011 | | Abstract: | We describe the cryogenic system for SPIDER, a balloon-borne microwave
polarimeter that will map 8% of the sky with degree-scale angular resolution.
The system consists of a 1284 L liquid helium cryostat and a 16 L
capillary-filled superfluid helium tank, which provide base operating
temperatures of 4 K and 1.5 K, respectively. Closed-cycle helium-3 adsorption
refrigerators supply sub-Kelvin cooling power to multiple focal planes, which
are housed in monochromatic telescope inserts. The main helium tank is
suspended inside the vacuum vessel with thermally insulating fiberglass
flexures, and shielded from thermal radiation by a combination of two vapor
cooled shields and multi-layer insulation. This system allows for an extremely
low instrumental background and a hold time in excess of 25 days. The total
mass of the cryogenic system, including cryogens, is approximately 1000 kg.
This enables conventional long duration balloon flights. We will discuss the
design, thermal analysis, and qualification of the cryogenic system. | | Source: | arXiv, 1106.2507 | | Services: | Forum | Review | PDF | Favorites | |
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