Developing a long duration 3He fridge for the LSPE/SWIPE instrument

G. Coppi, P. De Bernardis, A. J. May, S. Masi, M. McCulloch, S. J. Melhuish, L. Piccirillo

Research output: Contribution to journalConference articlepeer-review


A 3He sorption cooler design for the Short-Wavelength Instrument for the Polarization Explorer (SWIPE) of the Large-Scale Polarization Explorer (LSPE) balloon-borne experiment is described. The aim of this experiment is the detection of the primordial B-mode polarisation component of the Cosmic Microwave Background. The SWIPE instrument will use Transition-Edge Sensors that are designed to work at temperature of almost 300 mK. Therefore, a 3He sorption cooler has been specifically designed that can reach this temperature with a heat load of up to 25 ìW. The fridge is compact in order to be housed inside the SWIPE cryostat and operate vertically. It has been designed to have a cycle duration of at least 7 days. In order to meet these specifications, the fridge will be charged with 0.75 moles of 3He.

Original languageEnglish
Article number100150H
JournalProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 29 Jul 2018
EventSPIE Astronomical Telescopes and Instrumentation 2016 - Edinburgh, United Kingdom
Duration: 26 Jun 20161 Jul 2016


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