LiteBIRD is a JAXA-led L-Class mission aimed at the study of B-mode polarization of the cosmic microwave background. Measurements on 15 bandwidth from 34 to 448 GHz are made on two instruments, low-frequency telescope and medium- and high-frequency telescope. To reach the desired sensitivities, more than 4500 transition edge sensors detectors, used on both instruments, will be continuously cooled to 100 mK. The cryogenic design based on shield cooling and mechanical coolers is presented in this paper. Shield cooling will be done with passive cooling and 15 K pulse tube coolers. A single cryogenic chain will cool both instruments. A 4 K stage is cooled by a 4He Joule–Thomson cooler from Japanese Aerospace Exploration Agency, pre-cooled by Stirling coolers. Multistage adiabatic demagnetization refrigerator will be optimized to provide continuous cooling at 1.75 K, 300 mK and 100 mK with 2.2 µW of cooling power on the latter stage. Seven ADR stages provided by NASA (USA) and CEA (France) are required. Details on the thermal design, preliminary sizing and expected performance are presented.
This is a preview of subscription content, log in to check access.
Buy single article
Instant access to the full article PDF.
Price includes VAT for USA
Subscribe to journal
Immediate online access to all issues from 2019. Subscription will auto renew annually.
This is the net price. Taxes to be calculated in checkout.
M. Kamionkowski et al., Phys. Rev. Lett. 78, 2058–2061 (1997)
U. Seljak et al., Phys. Rev. Lett. 78, 2054–2057 (1997)
M. Hazumi et al., J. Low Temp. Phys. 194, 443–452 (2019)
Y. Sekimoto et al., SPIE Proc. 10698, 106981Y-1 (2018)
T. Hasebe et al., JATIS 5(4), 044002 (2019)
C. Chassaing et al., Cryocooler 18, 27–32 (2014)
K. Narasaki et al., Adv. Cryo Eng. 49B, 1785–1794 (2004)
O. Kiyomi et al., Cryogenics 50(9), 512–515 (2010)
Y. Sato et al., Cryogenics 50, 500–506 (2010)
P. Shirron et al., Adv. Cryo Eng. 45A, 1629–1638 (2000)
L. Duband et al., Cryogenics 64, 213–219 (2014)
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
About this article
Cite this article
Duval, J., Prouvé, T., Shirron, P. et al. LiteBIRD Cryogenic Chain: 100 mK Cooling with Mechanical Coolers and ADRs. J Low Temp Phys (2020). https://doi.org/10.1007/s10909-020-02371-z
- Magnetic shielding