The optical design and performance of TolTEC: a millimeter-wave imaging polarimeter

Lunde, Emily, Ade, Peter ORCID: https://orcid.org/0000-0002-5127-0401, Berthoud, Marc, Contente, Reid, DeNigris, N. S., Doyle, Simon ORCID: https://orcid.org/0000-0002-9054-986X, Ferrusca, Daniel, Golex, Joey, Kuczarski, Stephen, Lee, Dennis, Ma, Zhiyuan, Mauskopf, Philip, McCrackan, Michael, McMahon, Jeffrey, Novak, Giles, Pisano, Giampaolo ORCID: https://orcid.org/0000-0003-4302-5681, Simon, Sara, Souccar, Kamal, Tucker, Carole ORCID: https://orcid.org/0000-0002-1851-3918, Underhill, Matthew, Van Camp, Eric and Wilson, Grant 2020. The optical design and performance of TolTEC: a millimeter-wave imaging polarimeter. Presented at: SPIE Astronomical Telescopes + Instrumentation 2020, Virtual, 14-18 December 2020. Proceedings Volume 11453, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X. SPIE, 10.1117/12.2562798

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Abstract

TolTEC is an imaging polarimeter that will be mounted on the 50m diameter Large Millimeter Telescope (LMT) in Mexico. This camera simultaneously images the focal plane at three wavebands centered at 1.1, 1.4, and 2.0mm. TolTEC combines polarization-sensitive Kinetic Inductance Detectors (KIDs) with the LMT to produce 5-10 arcmin resolution maps of the sky in both total intensity and polarization. The light from the telescope is coupled to the TolTEC instrument using three room temperature mirrors. Before entering the cryostat, the light passes through a rapid-spinning achromatic half-wave plate, and once inside it passes through a 1 K Lyot stop that controls the telescope illumination. Inside the cryostat, a series of aluminum mirrors, silicon lenses, and dichroic filters split the light into three wavelength bands and direct each band to a different detector array. We will describe the design, and performance of the optics before installation at the telescope....

Item Type:	Conference or Workshop Item (Poster)
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Publisher:	SPIE
Last Modified:	19 Apr 2023 11:30
URI:	https://orca.cardiff.ac.uk/id/eprint/156707

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