The Cryogenic System of the MISTRAL Instrument: Design and In-lab Performance.

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Title: The Cryogenic System of the MISTRAL Instrument: Design and In-lab Performance.
Authors: Coppolecchia, A.1,2 (AUTHOR) alessandro.coppolecchia@roma1.infn.it, Carbone, A.1 (AUTHOR), D' Alessandro, G.1,2 (AUTHOR), Barbavara, E.1 (AUTHOR), Battistelli, E. S.1,2 (AUTHOR), de Bernardis, P.1,2 (AUTHOR), Cacciotti, F.1 (AUTHOR), Capalbo, V.1 (AUTHOR), Carretti, E.3 (AUTHOR), Ciccalotti, D.1 (AUTHOR), Columbro, F.1,2 (AUTHOR), Cruciani, A.2 (AUTHOR), De Petris, M.1,2 (AUTHOR), Govoni, F.4 (AUTHOR), Isopi, G.1 (AUTHOR), Lamagna, L.1,2 (AUTHOR), Levati, E.1 (AUTHOR), Marongiu, P.4 (AUTHOR), Mascia, A.4 (AUTHOR), Masi, S.1,2 (AUTHOR)
Source: Journal of Low Temperature Physics. Mar2025, Vol. 218 Issue 5, p335-346. 12p.
Subjects: Lumped elements, Heating load, Sorption, Cryogenics, Cryostats
Abstract: We describe the design and performance of the cryostat and the multi-stage sub-K single-shot sorption cooler for the MIllimeter Sardinia Radio Telescope Receiver based on Array of Lumped elements kids (MISTRAL) experiment. MISTRAL is a W-band (77 - 103 GHz) Ti/Al bi-layer Lumped Elements Kinetic Inductance Detectors (LEKIDs) camera working at the Gregorian focus of the 64 m aperture Sardinia Radio Telescope (SRT), located in Sardinia (Italy). The cryogenic system, based on a 1.5 W at 4.2 K Pulse Tube (PT) cryocooler, provides the 4 K base temperature for the sub-K refrigerator, and cools down the cold optics and the filters chain of the instrument. The sub-K sorption cooler consists of two intermediate stages, 4 He and 3 He sorption refrigerators that allow to reduce the heat load on the ultra-cold head, and a twin stage of 3 He sorption refrigerator providing the 0.2 K operation temperature for the 415-pixel array of LEKIDs. MISTRAL experiment was installed at SRT in May 2023, the technical commissioning started in June 2023. We will show the performance of the system in the laboratory. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Low Temperature Physics is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Low+Temperature+Physics%22">Journal of Low Temperature Physics</searchLink>. Mar2025, Vol. 218 Issue 5, p335-346. 12p.
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  Data: We describe the design and performance of the cryostat and the multi-stage sub-K single-shot sorption cooler for the MIllimeter Sardinia Radio Telescope Receiver based on Array of Lumped elements kids (MISTRAL) experiment. MISTRAL is a W-band (77 - 103 GHz) Ti/Al bi-layer Lumped Elements Kinetic Inductance Detectors (LEKIDs) camera working at the Gregorian focus of the 64 m aperture Sardinia Radio Telescope (SRT), located in Sardinia (Italy). The cryogenic system, based on a 1.5 W at 4.2 K Pulse Tube (PT) cryocooler, provides the 4 K base temperature for the sub-K refrigerator, and cools down the cold optics and the filters chain of the instrument. The sub-K sorption cooler consists of two intermediate stages, 4 He and 3 He sorption refrigerators that allow to reduce the heat load on the ultra-cold head, and a twin stage of 3 He sorption refrigerator providing the 0.2 K operation temperature for the 415-pixel array of LEKIDs. MISTRAL experiment was installed at SRT in May 2023, the technical commissioning started in June 2023. We will show the performance of the system in the laboratory. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Journal of Low Temperature Physics is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s10909-024-03263-2
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        Text: English
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      – SubjectFull: Sorption
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      – SubjectFull: Cryogenics
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      – SubjectFull: Cryostats
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