In this paper, we present beam pattern tests performed on the SWIPE multi-mode bolometric detector pixel assembly. A 20-mm-aperture horn is coupled to a large detector absorber (10 mm diameter) with a TES sensor located on the side. The pixel assembly has been tested at the bolometer base temperature of 340 mK, inside a custom cryogenic test bed, looking at a Gunn oscillator (128 GHz) located in the far field. We developed a custom cryogenic neoprene absorber, in addition to the stack of standard metal meshes low-pass filters, to reduce the background on the detector at a level similar to the one expected in flight, allowing to measure the main beam of the pixel assembly. The measured FWHM is 21°, slightly narrower than the expected one (24°), due to vignetting produced by the filters stack.

SWIPE multi-mode pixel assembly design and beam pattern measurements at cryogenic temperature / Columbro, F.; Madonia, P. G.; Lamagna, L.; Battistelli, E. S.; Coppolecchia, A.; de Bernardis, P.; Gualtieri, R.; Masi, S.; Paiella, A.; Piacentini, F.; Presta, G.; Biasotti, M.; D'alessandro, Giuseppe; Gatti, F.; Mele, L.; Siri, B.. - In: JOURNAL OF LOW TEMPERATURE PHYSICS. - ISSN 0022-2291. - (2020). [10.1007/s10909-020-02396-4]

SWIPE multi-mode pixel assembly design and beam pattern measurements at cryogenic temperature

Columbro, F.
Primo
;
Madonia, P. G.;Lamagna, L.;Battistelli, E. S.;Coppolecchia, A.;de Bernardis, P.;Masi, S.;Paiella, A.;Piacentini, F.;Presta, G.;D'alessandro, Giuseppe;Mele, L.;
2020

Abstract

In this paper, we present beam pattern tests performed on the SWIPE multi-mode bolometric detector pixel assembly. A 20-mm-aperture horn is coupled to a large detector absorber (10 mm diameter) with a TES sensor located on the side. The pixel assembly has been tested at the bolometer base temperature of 340 mK, inside a custom cryogenic test bed, looking at a Gunn oscillator (128 GHz) located in the far field. We developed a custom cryogenic neoprene absorber, in addition to the stack of standard metal meshes low-pass filters, to reduce the background on the detector at a level similar to the one expected in flight, allowing to measure the main beam of the pixel assembly. The measured FWHM is 21°, slightly narrower than the expected one (24°), due to vignetting produced by the filters stack.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11573/1368060
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