Saugata Dutt,1 Darren Erickson,2 Suresh Sivanandam,1,3 Shaojie Chen,1 Denis Brousseau,4 Tristan Chabot,4 Simon Thibaulthttps://orcid.org/0000-0002-2791-0595,4 Simon Paquin,5 Jean-Thomas Landry5
1Dunlap Institute for Astronomy & Astrophysics (Canada) 2NRC - Herzberg Astronomy & Astrophysics (Canada) 3Univ. of Toronto (Canada) 4Univ. Laval (Canada) 5Opto-Mécanique de Précision (Canada)
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.
In this paper we discuss the mechanical design of the GIRMOS Cryostat. GIRMOS is an adaptive optics fed multi-object Integral-Field Spectrograph with a parallel imaging capability and will be installed at the Gemini North Observatory. This instrument includes four separate identical spectrograph channels arranged symmetrically around the central axis of the instrument which provide it its multiplexing capability. Each spectrograph channel starts off at the object selection mechanism. The object selection mechanism contains four motorized fold mirror assemblies which scan the incoming light from the telescope to look at four separate objects simultaneously or combine their efforts to look at a single object in a tiled mode. Each of the four individual beams from the object selection system are then directed into the instrument dewar via separate entrance windows. Within the dewar each IFS beam moves through an anamorphic relay, an optical image slicer assembly and eventually makes it to a Spectrograph unit. All of these assemblies are located on a single cold bench within the dewar. The instrument imager is located along the central axis of the dewar and is housed in the cold bench as well. In this paper we will provide some details regarding the Cryostat design, the mechanical packaging of the IFS and imager along with some of the thermal load mitigation techniques employed. We will also discuss some key performance requirements that were expected from the Cryostat and the design choices we made in order to achieve them.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.
The alert did not successfully save. Please try again later.
Saugata Dutt, Darren Erickson, Suresh Sivanandam, Shaojie Chen, Denis Brousseau, Tristan Chabot, Simon Thibault, Simon Paquin, Jean-Thomas Landry, "Preliminary mechanical design of the Gemini Infrared Multi-Object Spectrograph (GIRMOS) Cryostat," Proc. SPIE 11447, Ground-based and Airborne Instrumentation for Astronomy VIII, 114476Q (13 December 2020); https://doi.org/10.1117/12.2563096