Simons Observatory: characterizing the Large Aperture Telescope Receiver with radio holography

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dc.contributor.authorChesmore, Grace E.
dc.contributor.authorHarrington, Kathleen
dc.contributor.authorSierra, Carlos E.
dc.contributor.authorGallardo, Patricio A.
dc.contributor.authorSutariya, Shreya
dc.contributor.authorAlford, Tommy
dc.contributor.authorAdler, Alexandre E.
dc.contributor.authorBhandarkar, Tanay
dc.contributor.authorCoppi, Gabriele
dc.contributor.authorDachlythra, Nadia
dc.contributor.authorGolec, Joseph
dc.contributor.authorGudmundsson, Jon
dc.contributor.authorHaridas, Saianeesh K.
dc.contributor.authorJohnson, Bradley R.
dc.contributor.authorKofman, Anna M.
dc.contributor.authorIuliano, Jeffrey
dc.contributor.authorMcmahon, Jeff
dc.contributor.authorNiemack, Michael D.
dc.contributor.authorOrlowski-Scherer, John
dc.contributor.authorSarmiento, Karen Perez
dc.contributor.authorPuddu, Roberto
dc.contributor.authorSilva-Feaver, Max
dc.contributor.authorSimon, Sara M.
dc.contributor.authorRobe, Julia
dc.contributor.authorWollack, Edward J.
dc.contributor.authorXu, Zhilei
dc.date.accessioned2025-01-20T21:01:17Z
dc.date.available2025-01-20T21:01:17Z
dc.date.issued2022
dc.description.abstractWe present near-field radio holography measurements of the Simons Observatory Large Aperture Telescope Receiver optics. These measurements demonstrate that radio holography of complex millimeter-wave optical systems comprising cryogenic lenses, filters, and feed horns can provide detailed characterization of wave propagation before deployment. We used the measured amplitude and phase, at 4 K, of the receiver near-field beam pattern to predict two key performance parameters: 1) the amount of scattered light that will spill past the telescope to 300 K and 2) the beam pattern expected from the receiver when fielded on the telescope. These cryogenic measurements informed the removal of a filter, which led to improved optical efficiency and reduced sidelobes at the exit of the receiver. Holography measurements of this system suggest that the spilled power past the telescope mirrors will be less than 1%, and the main beam with its near sidelobes are consistent with the nominal telescope design. This is the first time such parameters have been confirmed in the lab prior to deployment of a new receiver. This approach is broadly applicable to millimeter and submillimeter instruments. (c) 2022 Optica Publishing Group
dc.fuente.origenWOS
dc.identifier.doi10.1364/AO.470138
dc.identifier.eissn2155-3165
dc.identifier.issn1559-128X
dc.identifier.urihttps://doi.org/10.1364/AO.470138
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/92851
dc.identifier.wosidWOS:000893424800001
dc.issue.numero34
dc.language.isoen
dc.pagina.final10319
dc.pagina.inicio10309
dc.revistaApplied optics
dc.rightsacceso restringido
dc.titleSimons Observatory: characterizing the Large Aperture Telescope Receiver with radio holography
dc.typeartículo
dc.volumen61
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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