Cryogenic environment and performance for testing the Planck radiometers
L. Terenzi, M. Lapolla, M. Laaninen, P. Battaglia, F. Cavaliere, A. De, Rosa, N. Hughes, P. Jukkala, V.-H. Kilpi\"a, G. Morgante, M. Tomasi, J., Varis, M. Bersanelli, R. C. Butler, F. Ferrari, C. Franceschet, P., Leutenegger, N. Mandolesi, A. Mennella, R. Silvestri
TL;DR
This paper details the design, calibration, and performance of cryogenic testing facilities for the Planck LFI radiometers, ensuring thermal stability and accurate calibration for space mission readiness.
Contribution
It introduces the cryogenic testing facilities and instrumentation specifically developed for calibrating the Planck LFI radiometers, including setup design and performance evaluation.
Findings
Cryogenic facilities successfully calibrated the radiometer chains.
Thermal stability requirements were achieved and verified.
Performance data supports readiness for space deployment.
Abstract
This paper is part of the Prelaunch status LFI papers published on JINST: http://www.iop.org/EJ/journal/-page=extra.proc5/jinst The Planck LFI Radiometer Chain Assemblies (RCAs) have been calibrated in two dedicated cryogenic facilities. In this paper the facilities and the related instrumentation are described. The main satellite thermal interfaces for the single chains have to be reproduced and stability requirements have to be satisfied. Setup design, problems occurred and improving solutions implemented are discussed. Performance of the cryogenic setup are reported.
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