SPT-SLIM: A Line Intensity Mapping Pathfinder for the South Pole Telescope
Abstract
The South Pole Telescope Summertime Line Intensity Mapper (SPT-SLIM) is a pathfinder experiment that will demonstrate the use of on-chip filter-bank spectrometers for mm-wave line intensity mapping (LIM). The SPT-SLIM focal plane consists of 18 dual-polarization R=300 filter-bank spectrometers covering 120-180 GHz, coupled to aluminum kinetic inductance detectors. A compact cryostat holds the detectors at 100 mK and performs observations without removing the SPT-3G receiver. SPT-SLIM will be deployed to the 10-m South Pole Telescope for observations during the 2023-24 austral summer. We discuss the overall instrument design, expected detector performance and sensitivity to the LIM signal from CO at 0.5 < z < 2. The technology and observational techniques demonstrated by SPT-SLIM will enable next-generation LIM experiments that constrain cosmology beyond the redshift reach of galaxy surveys.
- Publication:
-
Journal of Low Temperature Physics
- Pub Date:
- December 2022
- DOI:
- 10.1007/s10909-022-02702-2
- arXiv:
- arXiv:2111.04631
- Bibcode:
- 2022JLTP..209..758K
- Keywords:
-
- Astrophysics - Instrumentation and Methods for Astrophysics;
- Astrophysics - Cosmology and Nongalactic Astrophysics
- E-Print:
- 7 pages, 4 figures. Submitted to the Journal of Low Temperature Physics (Proceedings of the 19th International Workshop on Low Temperature Detectors)