22 July 2016 Developing a long duration 3He fridge for the LSPE-SWIPE instrument
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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 μW. 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.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Gabriele Coppi, Gabriele Coppi, Paolo de Bernardis, Paolo de Bernardis, Andrew J. May, Andrew J. May, Silvia Masi, Silvia Masi, Mark McCulloch, Mark McCulloch, Simon J. Melhuish, Simon J. Melhuish, Lucio Piccirillo, Lucio Piccirillo, } "Developing a long duration 3He fridge for the LSPE-SWIPE instrument", Proc. SPIE 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II, 991265 (22 July 2016); doi: 10.1117/12.2232448; https://doi.org/10.1117/12.2232448

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