Free Search (10894 images)
Herschel’s cryostat vacuum vessel
Rating: 5.00/5 (6 votes cast)
- Title Herschel’s cryostat vacuum vessel
- Released 19/09/2007 9:26 am
- Copyright ESA
The Herschel cryostat vacuum vessel, seen here in the ESTEC cleanroom, stores 2370 litres of superfluid liquid helium (He II) which is used to help cool the various elements of the detector plane. In orbit, the black outer half of the vessel faces away from the Sun and acts as a radiator while the reflective half faces the inside of the sunshade and reflects excess heat.