CCAT-prime: Designs and status of the first light 280 GHz MKID array and Mod-Cam receiver

TL;DR

This paper describes the design, fabrication, and deployment plans of the first 280 GHz MKID array for the CCAT-prime project, aiming to enable advanced submillimeter observations on the FYST telescope.

Contribution

It introduces the first 280 GHz MKID array for CCAT-prime, detailing its mechanical design, fabrication, and integration plans within the Mod-Cam testbed.

Findings

First 280 GHz MKID array with 3,456 detectors

Mechanical design allows up to three arrays per module

Plans for deployment on the FYST telescope in 2022

Abstract

The CCAT-prime project's first light array will be deployed in Mod-Cam, a single-module testbed and first light cryostat, on the Fred Young Submillimeter Telescope (FYST) in Chile's high Atacama desert in late 2022. FYST is a six-meter aperture telescope being built on Cerro Chajnantor at an elevation of 5600 meters to observe at millimeter and submillimeter wavelengths.1 Mod-Cam will pave the way for Prime-Cam, the primary first generation instrument, which will house up to seven instrument modules to simultaneously observe the sky and study a diverse set of science goals from monitoring protostars to probing distant galaxy clusters and characterizing the cosmic microwave background (CMB). At least one feedhorn-coupled array of microwave kinetic inductance detectors (MKIDs) centered on 280 GHz will be included in Mod-Cam at first light, with additional instrument modules to be deployed along with Prime-Cam in stages. The first 280 GHz detector array was fabricated by the Quantum Sensors Group at NIST in Boulder, CO and includes 3,456 polarization-sensitive MKIDs. Current mechanical designs allow for up to three hexagonal arrays to be placed in each single instrument module. We present details on this first light detector array, including mechanical designs and cold readout plans, as well as introducing Mod-Cam as both a testbed and predecessor to Prime-Cam.