| Autor: |
Jewell, C., Passvogel, T., Gageur, U., Pilbratt, G., Pedersen, F., Crone, G., Linder, M., Reix, J.-M., Montet, D., Lelievre, J.-L., Roche, Y., Demolder, B. |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 4/9/2010, Vol. 1218 Issue 1, p1487-1493, 7p |
| Abstrakt: |
Since its launch on May 14th 2009 Herschel is the largest telescope of its kind in space. Herschel’s 3.5-metre diameter mirror collects long-wavelength infrared radiation from some of the coldest and most distant objects in the Universe. Herschel is the only space observatory to cover the spectral range from far-infrared to sub-millimetre wavelengths. The Herschel satellite is 7.5 metres high and 4 metres wide, with a launch mass of approximately 3.3 tonnes. The bulk of the spacecraft consists of a superfluid liquid helium cryostat inside which three scientific instruments (PACS, SPIRE & HIFI) are operated. Via various cooling stages the instruments are cooled to between a few tens and a few tenths of a degree above absolute zero. This paper gives a brief overview of the spacecraft and the on-ground testing, with an emphasis on the cryogenic issues encountered. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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