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Boolean: (bicycle AND helmet) OR (head AND protection) (always group AND in parenthesis)
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10 items by relevance
1 Journal article

Planck Early Results: The thermal performance of Planck

Ade, P. A. R.; Aghanim, N.; Arnaud, M.; Ashdown, M.; Aumont, J.; Baccigalupi, C.; et al. (221 more)

Astronomy and Astrophysics — 2011

The performance of the Planck instruments in space is enabled by their low operating temperatures, 20K for LFI and 0.1K for HFI, achieved through a combination of passive radiative cooling and three active mechanical coolers. Active coolers were chosen to minimize straylight on the detectors and to maximize lifetime. The scientific requirement for very broad frequency led to two detector technologies with widely dierent temperature and cooling needs. This made use of a helium cryostat, as used by previous cryogenic space missions (IRAS, COBE, ISO, SPITZER, AKARI), infeasible. Radiative cool...

Year: 2011

Language: English

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oelgch nkm pjfdbai
2 Journal article · Preprint article

Planck early results. II. The thermal performance of Planck

Poutanen, T.; Natoli, P.; Polenta, G.; Bréelle, E.; Bucher, M.; Cardoso, J.-F.; et al. (281 more)

Astronomy and Astrophysics — 2011, Volume 536, pp. A2

The performance of the Planck instruments in space is enabled by their low operating temperatures, 20 K for LFI and 0.1 K for HFI, achieved through a combination of passive radiative cooling and three active mechanical coolers. The scientific requirement for very broad frequency coverage led to two

Year: 2011

Language: English

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ejadplbhf omcnkig

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