Cosmology Large Angular Scale Surveyor (CLASS) Focal Plane Development
D.T. Chuss, A. Ali, M. Amiri, J. Appel, C.L. Bennett, F. Colazo, K.L., Denis, R. D\"unner, T. Essinger-Hileman, J. Eimer, P. Fluxa, D. Gothe, M., Halpern, K. Harrington, G. Hilton, G. Hinshaw, J. Hubmayr, J. Iuliano, T.A., Marriage, N. Miller, S.H. Moseley, G. Mumby, M. Petroff

TL;DR
The CLASS project aims to measure the polarization of the Cosmic Microwave Background across large angular scales to detect inflationary signatures, utilizing advanced polarization modulation and multi-frequency detectors from the Atacama Desert.
Contribution
This paper details the development of the CLASS focal plane with innovative polarization modulation, multi-frequency detectors, and integrated band definition for precise CMB polarization measurements.
Findings
Successful implementation of VPM for polarization modulation.
Multi-frequency focal planes covering 38-217 GHz.
Enhanced detector uniformity and efficiency using single-crystal silicon.
Abstract
The Cosmology Large Angular Scale Surveyor (CLASS) will measure the polarization of the Cosmic Microwave Background to search for and characterize the polarized signature of inflation. CLASS will operate from the Atacama Desert and observe 70% of the sky. A variable-delay polarization modulator (VPM) modulates the polarization at 10 Hz to suppress the 1/f noise of the atmosphere and enable the measurement of the large angular scale polarization modes. The measurement of the inflationary signal across angular scales that span both the recombination and reionization features allows a test of the predicted shape of the polarized angular power spectra in addition to a measurement of the energy scale of inflation. CLASS is an array of telescopes covering frequencies of 38, 93, 148, and 217 GHz. These frequencies straddle the foreground minimum and thus allow the extraction of…
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Taxonomy
TopicsCosmology and Gravitation Theories · Radio Astronomy Observations and Technology · Electrical and Electromagnetic Research
