Thermal susceptibility of the Planck-LFI receivers
L Terenzi, M J Salmon, A Colin, A Mennella, G Morgante, M Tomasi, P, Battaglia, M Lapolla, M Bersanelli, R C Butler, F Cuttaia, O D'Arcangelo, R, Davis, C Franceschet, S Galeotta, A Gregorio, N Hughes, P Jukkala, D Kettle,, M Laaninen, P Leutenegger, R Leonardi, N Mandolesi
TL;DR
This paper analyzes how temperature fluctuations in the Planck-LFI receivers affect their output signals, providing an analytical model, experimental validation, and comparison to performance requirements.
Contribution
It introduces an analytical model of thermal effects on the receivers and reports experimental validation during ground calibration.
Findings
Thermal instabilities impact the receiver signals.
The analytical model predicts the propagation of temperature fluctuations.
Results meet the instrument's performance requirements.
Abstract
This paper is part of the Prelaunch status LFI papers published on JINST: http://www.iop.org/EJ/journal/-page=extra.proc5/jinst . This paper describes the impact of the Planck Low Frequency Instrument front end physical temperature fluctuations on the output signal. The origin of thermal instabilities in the instrument are discussed, and an analytical model of their propagation and impact on the receivers signal is described. The experimental test setup dedicated to evaluate these effects during the instrument ground calibration is reported together with data analysis methods. Finally, main results obtained are discussed and compared to the requirements.
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