Thermal models of the Planck/LFI QM/FM instruments

Details Thermal models of the Planck/LFI QM/FM instruments Thermal models of the Planck/LFI QM/FM instruments

Jul 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006spie.6271e..32t&link_type=abstract

Modeling, Systems Engineering, and Project Management for Astronomy II. Edited by Cullum, Martin J.; Angeli, George Z.. Procee

Astronomy and Astrophysics

Astronomy

2

Scientific paper

The ESA Planck mission is the third generation (after COBE and WMAP) space experiment dedicated to the measurement of the Cosmic Microwave Background (CMB) anisotropies. Two instruments will be integrated onboard: the High Frequency Instrument (HFI), an array of bolometers, and the Low Frequency Instrument (LFI), an array of pseudo-correlation HEMT radiometers. In this paper we will discuss the development of analytical and numerical models to estimate the thermal behavior of LFI, both in steady-state and transient conditions. We then describe their application to the qualification model (QM) tests. QM test data were also used to calibrate the numerical models. Finally, we show some examples about how these models can be used in predicting the instrument performances and the impact of thermal systematic effects on the scientific results.

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