학술논문
SPT-3G+: Mapping the High-Frequency Cosmic Microwave Background Using Kinetic Inductance Detectors
Document Type
Working Paper
Author
Anderson, A. J.; Barry, P.; Bender, A. N.; Benson, B. A.; Bleem, L. E.; Carlstrom, J. E.; Cecil, T. W.; Chang, C. L.; Crawford, T. M.; Dibert, K. R.; Dobbs, M. A.; Fichman, K.; Halverson, N. W.; Holzapfel, W. L.; Hryciuk, A.; Karkare, K. S.; Li, J.; Lisovenko, M.; Marrone, D.; McMahon, J.; Montgomery, J.; Natoli, T.; Pan, Z.; Raghunathan, S.; Reichardt, C. L.; Rouble, M.; Shirokoff, E.; Smecher, G.; Stark, A. A.; Vieira, J. D.; Young, M. R.
Source
Subject
Language
Abstract
We present the design and science goals of SPT-3G+, a new camera for the South Pole Telescope, which will consist of a dense array of 34100 kinetic inductance detectors measuring the cosmic microwave background (CMB) at 220 GHz, 285 GHz, and 345 GHz. The SPT-3G+ dataset will enable new constraints on the process of reionization, including measurements of the patchy kinematic Sunyaev-Zeldovich effect and improved constraints on the optical depth due to reionization. At the same time, it will serve as a pathfinder for the detection of Rayleigh scattering, which could allow future CMB surveys to constrain cosmological parameters better than from the primary CMB alone. In addition, the combined, multi-band SPT-3G and SPT-3G+ survey data will have several synergies that enhance the original SPT-3G survey, including: extending the redshift-reach of SZ cluster surveys to $z > 2$; understanding the relationship between magnetic fields and star formation in our Galaxy; improved characterization of the impact of dust on inflationary B-mode searches; and characterizing astrophysical transients at the boundary between mm and sub-mm wavelengths. Finally, the modular design of the SPT-3G+ camera allows it to serve as an on-sky demonstrator for new detector technologies employing microwave readout, such as the on-chip spectrometers that we expect to deploy during the SPT-3G+ survey. In this paper, we describe the science goals of the project and the key technology developments that enable its powerful yet compact design.
Comment: 26 pages, 9 figures, to appear in the proceedings of SPIE Astronomical Telescopes and Instrumentation 2022
Comment: 26 pages, 9 figures, to appear in the proceedings of SPIE Astronomical Telescopes and Instrumentation 2022