Final mechanical design of the Gemini Infrared Multi-Object Spectrograph (GIRMOS) cryostat

Saugata Dutt; Suresh Sivanandam; Simon Paquin; Gavin Hay; Vladimir Reshetov; Daniel Hofstadter; Badi Ebrahimifard; Shaojie Chen; Patrick Nkwari; Marc-André Boucher; Simon Thibault; Jean-Thomas Landry; Sarik Jeram

doi:10.1117/12.3020544

18 July 2024 Final mechanical design of the Gemini Infrared Multi-Object Spectrograph (GIRMOS) cryostat

Saugata Dutt, Suresh Sivanandam, Simon Paquin, Gavin Hay, Vladimir Reshetov, Daniel Hofstadter, Badi Ebrahimifard, Shaojie Chen, Patrick Nkwari, Marc-André Boucher, Simon Thibault, Jean-Thomas Landry, Sarik Jeram

Author Affiliations +

Proceedings Volume 13096, Ground-based and Airborne Instrumentation for Astronomy X; 1309664 (2024) https://doi.org/10.1117/12.3020544
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

In this paper we discuss the final mechanical design of the GIRMOS Cryostat. GIRMOS is an adaptive optics fed multi-object Integral-Field Spectrograph (IFS) with a parallel imaging capability and will be installed at the Gemini North Observatory. This instrument includes four identical spectrograph channels arranged symmetrically around a central optical axis which provides it with a multiplexing capability. GIRMOS has an object selection sub-assembly (OSEL) located upstream of the spectrographs which contains four motorized fold mirror assemblies that can scan the incoming light from the telescope to look at four separate sections of the sky simultaneously or can combine their efforts to look at a single larger section of the sky in a tiled mode. Each of the four individual IFS beams from the OSEL assembly is directed into the instrument Cryostat via its dedicated optical entrance window. Within the Cryostat each IFS beam moves through an anamorphic relay, an optical image slicer assembly, and eventually makes it to a spectrograph unit. In this paper, we will provide some details regarding the vacuum chamber design that houses the spectrographs, the design of the internal support structure, the opto-mechanical packaging of the IFS along with some of the thermal load mitigation techniques employed.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Saugata Dutt, Suresh Sivanandam, Simon Paquin, Gavin Hay, Vladimir Reshetov, Daniel Hofstadter, Badi Ebrahimifard, Shaojie Chen, Patrick Nkwari, Marc-André Boucher, Simon Thibault, Jean-Thomas Landry, and Sarik Jeram "Final mechanical design of the Gemini Infrared Multi-Object Spectrograph (GIRMOS) cryostat", Proc. SPIE 13096, Ground-based and Airborne Instrumentation for Astronomy X, 1309664 (18 July 2024); https://doi.org/10.1117/12.3020544

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