Thermal architecture for the QUBIC cryogenic receiver
Abstract
QUBIC, the QU Bolometric Interferometer for Cosmology, is a novel forthcoming instrument to measure the B-mode polarization anisotropy of the Cosmic Microwave Background. The detection of the B-mode signal will be extremely challenging; QUBIC has been designed to address this with a novel approach, namely bolometric interferometry. The receiver cryostat is exceptionally large and cools complex optical and detector stages to 40 K, 4 K, 1 K and 350 mK using two pulse tube coolers, a novel 4He sorption cooler and a double-stage 3He/4He sorption cooler. We discuss the thermal and mechanical design of the cryostat, modelling and thermal analysis, and laboratory cryogenic testing.
- Publication:
-
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX
- Pub Date:
- July 2018
- DOI:
- 10.1117/12.2312085
- arXiv:
- arXiv:1811.02296
- Bibcode:
- 2018SPIE10708E..3VM
- Keywords:
-
- Astrophysics - Instrumentation and Methods for Astrophysics;
- Physics - Instrumentation and Detectors
- E-Print:
- Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX. Vol. 10708. International Society for Optics and Photonics, 2018