The Design of The CCAT-prime Epoch of Reionization Spectrometer Instrument

Abstract

The Epoch of Reionization Spectrometer (EoR-Spec) is an instrument module for the Prime-Cam receiver of the 6 m aperture CCAT-prime Telescope at 5600 m in Chile. EoR-Spec will perform 158 $\mu$m [CII] line intensity mapping of star-forming regions at redshifts between 3.5 and 8 (420 - 210 GHz), tracing the evolution of structure during early galaxy formation. At lower redshifts, EoR-Spec will observe galaxies near the period of peak star formation - when most stars in today's universe were formed. At higher redshifts, EoR-Spec will trace the late stages of reionization, the early stages of galaxy assembly, and the formation of large-scale, three-dimensional clustering of star-forming galaxies. To achieve its science goals, EoR-Spec will utilize CCAT-prime's exceptionally low water vapor site, large field of view ($\sim 5$ degrees at 210 GHz), and narrow beam widths ($\sim 1$ arcminute at 210 GHz). EoR-Spec will be outfitted with a cryogenic, metamaterial, silicon substrate-based Fabry-Perot Interferometer operating at a resolving power ($\lambda /\Delta \lambda$) of 100. Monolithic dichroic arrays of cryogenic, feedhorn-coupled transition edge sensor bolometers provide approximately 6000 detectors, which are read out using a frequency division multiplexing system based on microwave SQUIDs. The novel design allows the measurement of the [CII] line at two redshifts simultaneously using dichroic pixels and two orders of the Fabry-Perot. Here we present the design and science goals of EoR-Spec, with emphasis on the spectrometer, detector array, and readout designs.

10 pages, 5 figures, 18th International Workshop on Low Temperature Detectors, submitted to the Journal of Low Temperature Physics

References in corpus (2)

• ALMA Imaging of Gas and Dust in a Galaxy Protocluster at Redshift 5.3: [CII] Emission in "Typical" Galaxies and Dusty Starbursts ~1 Billion Years after the Big Bang
• Microwave SQUID Multiplexer demonstration for Cosmic Microwave Background Imagers

Cited by in corpus (12)

• CCAT-prime Collaboration: Science Goals and Forecasts with Prime-Cam on the Fred Young Submillimeter Telescope
• Sensitivity of the Prime-Cam Instrument on the CCAT-prime Telescope
• SPT-SLIM: A Line Intensity Mapping Pathfinder for the South Pole Telescope
• A model of spectral line broadening in signal forecasts for line-intensity mapping experiments
• First Constraints on the Epoch of Reionization Using the non-Gaussianity of the Kinematic Sunyaev-Zel{'}dovich Effect from the South Pole Telescope and {\it Herschel}-SPIRE Observations
• The ALMA Spectroscopic Survey in the HUDF: A Search for [CII] Emitters at $6\le z\le 8$
• Revisiting the [C II]${}_{158\mu \text{m}}$ line-intensity mapping power spectrum from the EoR using non-uniform line-luminosity scatter
• Implications of the $z>5$ Lyman-$\alpha$ forest for the 21-cm power spectrum from the epoch of reionization
• CII and HI 21-cm line intensity mapping from the EoR: Impact of the light-cone effect on auto and cross-power spectra
• Constraining the [CII] luminosity function from the power spectrum of line-intensity maps at redshift 3.6
• Design of SPT-SLIM focal plane; a spectroscopic imaging array for the South Pole Telescope
• A millimetre-wave superconducting hyper-spectral device