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Published November 10, 2008 | Published
Journal Article Open

Initial test results on bolometers for the Planck high frequency instrument


We summarize the fabrication, flight qualification, and dark performance of bolometers completed at the Jet Propulsion Laboratory for the High Frequency Instrument (HFI) of the joint ESA/NASA Herschel/Planck mission to be launched in 2009. The HFI is a multicolor focal plane which consists of 52 bolometers operated at 100 mK. Each bolometer is mounted to a feedhorn-filter assembly which defines one of six frequency bands centered between 100-857 GHz. Four detectors in each of five bands from 143-857 GHz are coupled to both linear polarizations and thus measure the total intensity. In addition, eight detectors in each of four bands (100, 143, 217, and 353 GHz) couple only to a single linear polarization and thus provide measurements of the Stokes parameters, Q and U, as well as the total intensity. The measured noise equivalent power (NEP) of all detectors is at or below the background limit for the telescope and time constants are a few ms, short enough to resolve point sources as the 5 to 9 arc min beams move across the sky at 1 rpm.

Additional Information

© 2008 Optical Society of America. Received 6 June 2008; accepted 11 August 2008; posted 10 October 2008 (Doc. ID 97085); published 4 November 2008. This work was performed for the Jet Propulsion Laboratory, California Institute of Technology, sponsored by the National Aeronautics and Space Administration (NASA). We acknowledge all staff at JPL who have contributed to this effort, particularly Jerry Mulder, Debi Romero, Minhee Yun, and Anarosa Villanueva for their key contributions. We also thank our collaborators at UCW, LERMA, College de France and IAS, Orsay, Paris.

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August 19, 2023
August 19, 2023