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28 June 2006 Thermal models of the Planck/LFI QM/FM instruments
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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.
© (2006) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Maurizio Tomasi, Giorgio Baldan, Marco Lapolla, Aniello Mennella, Gianluca Morgante, Luca Pagan, and Luca Terenzi "Thermal models of the Planck/LFI QM/FM instruments", Proc. SPIE 6271, Modeling, Systems Engineering, and Project Management for Astronomy II, 62710X (28 June 2006);

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