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

Emily Lunde; Peter Ade; Marc Berthoud; Reid Contente; N. S. DeNigris; Simon Doyle; Daniel Ferrusca; Joey Golec; Stephen Kuczarski; Dennis Lee; Zhiyuan Ma; Philip Mauskopf; Michael McCrackan; Jeffrey McMahon; Giles Novak; Giampaolo Pisano; Sara Simon; Kamal Souccar; Carole Tucker; Matthew Underhill; Eric Van Camp; Grant Wilson

doi:10.1117/12.2562798

15 December 2020 The optical design and performance of TolTEC: a millimeter-wave imaging polarimeter

Emily Lunde, Peter Ade, Marc Berthoud, Reid Contente, N. S. DeNigris, Simon Doyle, Daniel Ferrusca, Joey Golec, Stephen Kuczarski, Dennis Lee, Zhiyuan Ma, Philip Mauskopf, Michael McCrackan, Jeffrey McMahon, Giles Novak, Giampaolo Pisano, Sara Simon, Kamal Souccar, Carole Tucker, Matthew Underhill, Eric Van Camp, Grant Wilson

Author Affiliations +

Proceedings Volume 11453, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X; 114534A (2020) https://doi.org/10.1117/12.2562798
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

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.

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Emily Lunde, Peter Ade, Marc Berthoud, Reid Contente, N. S. DeNigris, Simon Doyle, Daniel Ferrusca, Joey Golec, Stephen Kuczarski, Dennis Lee, Zhiyuan Ma, Philip Mauskopf, Michael McCrackan, Jeffrey McMahon, Giles Novak, Giampaolo Pisano, Sara Simon, Kamal Souccar, Carole Tucker, Matthew Underhill, Eric Van Camp, and Grant Wilson "The optical design and performance of TolTEC: a millimeter-wave imaging polarimeter", Proc. SPIE 11453, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X, 114534A (15 December 2020); https://doi.org/10.1117/12.2562798

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