A long duration cryostat suitable for balloon borne photometry

A long duration cryostat suitable for balloon borne photometry

We describe a 4He cryostat suitable for cooling a large (about 50 l in volume) multiband bolometric photometer for mm-waves. The cryostat features two large optical windows and a hold time longer than 2 weeks. The long hold time has been obtained using a 20 K vapour cooled shield for the liquid heli...

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Veröffentlicht in:Cryogenics (Guildford) 1999-03, Vol.39 (3), p.217-224
Hauptverfasser: Masi, S., Cardoni, P., de Bernardis, P., Piacentini, F., Raccanelli, A., Scaramuzzi, F.
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Balloons
Bolometers
Cooling
Cryogenics
Cryostats
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Instrumentation
Photometers
Refrigerating engineering. Cryogenics. Food conservation
Space cryogenics
Superfluid helium
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Beschreibung
Zusammenfassung:We describe a 4He cryostat suitable for cooling a large (about 50 l in volume) multiband bolometric photometer for mm-waves. The cryostat features two large optical windows and a hold time longer than 2 weeks. The long hold time has been obtained using a 20 K vapour cooled shield for the liquid helium tank and superinsulation for the nitrogen tank. The tanks are supported by kevlar cords. The cryostat has been optimized for operation on long duration stratospheric balloon flights, and has been tested successfully at ground level and on two short balloon flights.
ISSN:0011-2275
1879-2235
DOI:10.1016/S0011-2275(99)00018-1