TY - GEN
T1 - The mexico uk sub-mm camera for astronomy (muscat) on-sky commissioning
T2 - Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI 2022
AU - Brien, T. L.R.
AU - Doyle, S.
AU - Hughes, D. H.
AU - Ade, P. A.R.
AU - Barry, P. S.
AU - Castillo-Dominguez, E.
AU - Dodd, C.
AU - Dunscombe, C.
AU - Eales, S.
AU - Ferrusca, D.
AU - Gomez-Rivera, V.
AU - Hargrave, P.
AU - Hernandez-Rebollar, J. L.
AU - Hornsby, A.
AU - House, J.
AU - Jauregui-Garcia, J. M.
AU - Mauskopf, P. D.
AU - Murias, D.
AU - Papageorgiou, A.
AU - Pascale, E.
AU - Peretto, N.
AU - Perez-Fajardo, A.
AU - Rowe, S.
AU - Sanchez-Arguelles, D.
AU - Smith, M. W.L.
AU - Souccar, K.
AU - Sudiwala, R.
AU - Tapia, M.
AU - Campos, A. T.
AU - Tucker, C.
AU - De La Velazquez, Rosa Becerra M.
AU - Ventura-Gonzalez, S.
AU - Walker, I.
N1 - Funding Information:
We acknowledge RCUK and CONACYT through the Newton Fund (grant no. ST/P002803/1), CONACYT for supporting the fellowship for the instrument scientist (grant no. 053), Chase Research Cryogenics for the
Publisher Copyright:
© 2022 SPIE.
PY - 2022
Y1 - 2022
N2 - MUSCAT is a new 1.1 mm band receiver which was installed on the 50 m Large Millimeter Telescope atop Volcan Sierra Negra in Puebla, Mexico during the final quarter of 2021 and commissioned on sky throughout 2022. MUSCAT uses a novel cooling chain consisting of a commercial pulse tube cooler, two thermal stages of passively-switched continuous sorption coolers, and a final miniature dilution refrigerator. Through this system MUSCAT achieves a continuous temperature of 120 mK at the focal plane and has shown continuous operation at this temperature for greater than 100 days during readiness testing. Through minimising the amount of helium-3 required, the design on MUSCAT's cryogenic systems produced a reliable, cost-effective cooling platform. Here we present the cryogenic design and performance of MUSCAT on-sky and compare this to that achieved during deployment-readiness testing at Cardiff (UK). We consider both cooldown time and achieved base temperature. We look at the impact on operation of relocating a pulse-tube cooled instrument from a development lab running on a 50 Hz mains electricity supply to a site running at 60 Hz. Finally, we describe the process of preparing the MUSCAT instrument for shipping and assess the success of this process in terms of remedial work required upon arrival.
AB - MUSCAT is a new 1.1 mm band receiver which was installed on the 50 m Large Millimeter Telescope atop Volcan Sierra Negra in Puebla, Mexico during the final quarter of 2021 and commissioned on sky throughout 2022. MUSCAT uses a novel cooling chain consisting of a commercial pulse tube cooler, two thermal stages of passively-switched continuous sorption coolers, and a final miniature dilution refrigerator. Through this system MUSCAT achieves a continuous temperature of 120 mK at the focal plane and has shown continuous operation at this temperature for greater than 100 days during readiness testing. Through minimising the amount of helium-3 required, the design on MUSCAT's cryogenic systems produced a reliable, cost-effective cooling platform. Here we present the cryogenic design and performance of MUSCAT on-sky and compare this to that achieved during deployment-readiness testing at Cardiff (UK). We consider both cooldown time and achieved base temperature. We look at the impact on operation of relocating a pulse-tube cooled instrument from a development lab running on a 50 Hz mains electricity supply to a site running at 60 Hz. Finally, we describe the process of preparing the MUSCAT instrument for shipping and assess the success of this process in terms of remedial work required upon arrival.
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U2 - 10.1117/12.2630071
DO - 10.1117/12.2630071
M3 - Conference contribution
AN - SCOPUS:85140727664
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI
A2 - Zmuidzinas, Jonas
A2 - Gao, Jian-Rong
PB - SPIE
Y2 - 17 July 2022 through 22 July 2022
ER -