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2 results on '"sub-millimetre astronomy"'

1. Characterization, deployment, and in-flight performance of the BLAST-TNG cryogenic receiver

Author

Johannes Hubmayr, Philip Daniel Mauskopf, Peter A. R. Ade, Gene C. Hilton, Jason E. Austermann, Gabriele Coppi, Juan D. Soler, Nicholas Galitzki, Mark J. Devlin, Michael R. Vissers, Federico Nati, Peter C. Ashton, Nathan P. Lourie, Dale Li, Paul A. Williams, Hamdi Mani, Jiansong Gao, Laura M. Fissel, Christopher McKenney, Carole Tucker, Bradley Dober, Caleb Wheeler, Jeff Klein, Giles Novak, Christopher Groppi, Valentina Fanfani, L. Javier Romualdez, Giampaolo Pisano, Adrian Sinclair, Joel N. Ullom, Samuel Gordon, Erin G. Cox, Ian Lowe, Zmuidzinas J.,Gao J.-R., Lowe, I, Ade, P, Ashton, P, Austermann, J, Coppi, G, Cox, E, Devlin, M, Dober, B, Fanfani, V, Fissel, L, Galitzki, N, Gao, J, Gordon, S, Groppi, C, Hilton, G, Hubmayr, J, Klein, J, Li, D, Lourie, N, Mani, H, Mauskopf, P, Mckenney, C, Nati, F, Novak, G, Pisano, G, Romualdez, J, Soler, J, Sinclair, A, Tucker, C, Ullom, J, Vissers, M, Wheeler, C, and Williams, P

Subjects
Physics, Pixel, business.industry, Firmware, Detector, Polarimetry, FOS: Physical sciences, Polarimeter, Cryogenics, computer.software_genre, law.invention, Telescope, Optics, law, Millimetre wave astronomy, sub-millimetre astronomy, polarimetry, interstellar dust, telescopes, star formation, Electronics, business, Astrophysics - Instrumentation and Methods for Astrophysics, computer, Instrumentation and Methods for Astrophysics (astro-ph.IM), Millimetre wave astronomy, sub-millimetre astronomy, polarimetry
Abstract

The Next Generation Balloon-borne Large Aperture Submillimeter Telescope (BLAST-TNG) is a submillimeter polarimeter designed to map interstellar dust and galactic foregrounds at 250, 350, and 500 microns during a 24-day Antarctic flight. The BLAST-TNG detector arrays are comprised of 918, 469, and 272 MKID pixels, respectively. The pixels are formed from two orthogonally oriented, crossed, linear-polarization sensitive MKID antennae. The arrays are cooled to sub 300mK temperatures and stabilized via a closed cycle $^3$He sorption fridge in combination with a $^4$He vacuum pot. The detectors are read out through a combination of the second-generation Reconfigurable Open Architecture Computing Hardware (ROACH2) and custom RF electronics designed for BLAST-TNG. The firmware and software designed to readout and characterize these detectors was built from scratch by the BLAST team around these detectors, and has been adapted for use by other MKID instruments such as TolTEC and OLIMPO. We present an overview of these systems as well as in-depth methodology of the ground-based characterization and the measured in-flight performance., Comment: Presented at SPIE Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X, December 13-18, 2020

Published
2020
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2. The optical design and performance of TolTEC: a millimeter-wave imaging polarimeter

Author

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

Subjects
Physics, Cryostat, Lyot stop, Physics::Instrumentation and Detectors, business.industry, Large Millimeter Telescope, Astrophysics::Instrumentation and Methods for Astrophysics, Polarimeter, Astrophysics::Cosmology and Extragalactic Astrophysics, law.invention, Telescope, Optics, Cardinal point, Achromatic lens, law, Dichroic filter, Millimetre wave astronomy, sub-millimetre astronomy, polarimetry, business, Astrophysics::Galaxy Astrophysics, Millimetre wave astronomy, sub-millimetre astronomy, polarimetry
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.

Published
2020

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