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Final design of the LSST primary/tertiary mirror cell assembly

Neill, Douglas R.
Muller, G.; Hileman, E.; DeVries, J.; Araujo, C.; Gressler, W.J.; Lotz, P.J.; Mills, D.; Sebag, J.; Thomas, S.; Warner, M.; Wiecha, O.
Douglas R. Neill ; Gary Muller ; Ed Hileman ; Joe DeVries ; Constanza Araujo , et al. " Final design of the LSST primary/tertiary mirror cell assembly ", Proc. SPIE 9906, Ground-based and Airborne Telescopes VI, 99060Q (July 27, 2016); doi:10.1117/12.2234016; http://dx.doi.org/10.1117/12.2234016
Publication Date: 
Wednesday, July 27, 2016
Type: 
Conference Papers
SPIE
Citable: 
no
SPIE Proceedings
Volume: 
9906
Abstract: 
The Large Synoptic Survey Telescope (LSST) primary/tertiary (M1M3) mirror cell assembly supports both on-telescope operations and off-telescope mirror coating. This assembly consists of the cast borosilicate M1M3 monolith mirror, the mirror support systems, the thermal control system, a stray light baffle ring, a laser tracker interface and the supporting steel structure. During observing the M1M3 mirror is actively supported by pneumatic figure control actuators and positioned by a hexapod. When the active system is not operating the mirror is supported by a separate passive wire rope isolator system. The center of the mirror cell supports a laser tracker which measures the relative position of the camera and secondary mirror for alignment by their hexapods. The mirror cell structure height of 2 meters provides ample internal clearance for installation and maintenance of mirror support and thermal control systems. The mirror cell also functions as the bottom of the vacuum chamber during coating. The M1M3 mirror has been completed and is in storage. The mirror cell structure is presently under construction by CAID Industries. The figure control actuators, hexapod and thermal control system are under developed and will be integrated into the mirror cell assembly by LSST personnel. The entire integrated M1M3 mirror cell assembly will the tested at the Richard F Caris Mirror Lab in Tucson, AZ (formerly Steward Observatory Mirror Lab). © (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Document-21542
Reviewed Under: 
LSST Project Publication Policy
Bibtex reference: 
@proceeding{doi:10.1117/12.2234016, author = {Neill, Douglas R. and Muller, Gary and Hileman, Ed and DeVries, Joe and Araujo , Constanza and Gressler, William J. and Lotz, Paul J. and Mills, Dave and Sebag, Jacques and Thomas, Sandrine and Warner, Mike and Wiecha, Oliver}, title = { Final design of the LSST primary/tertiary mirror cell assembly }, journal = {Proc. SPIE}, volume = {9906}, number = {}, pages = {99060Q-99060Q-17}, abstract = { The Large Synoptic Survey Telescope (LSST) primary/tertiary (M1M3) mirror cell assembly supports both on-telescope operations and off-telescope mirror coating. This assembly consists of the cast borosilicate M1M3 monolith mirror, the mirror support systems, the thermal control system, a stray light baffle ring, a laser tracker interface and the supporting steel structure. During observing the M1M3 mirror is actively supported by pneumatic figure control actuators and positioned by a hexapod. When the active system is not operating the mirror is supported by a separate passive wire rope isolator system. The center of the mirror cell supports a laser tracker which measures the relative position of the camera and secondary mirror for alignment by their hexapods. The mirror cell structure height of 2 meters provides ample internal clearance for installation and maintenance of mirror support and thermal control systems. The mirror cell also functions as the bottom of the vacuum chamber during coating. The M1M3 mirror has been completed and is in storage. The mirror cell structure is presently under construction by CAID Industries. The figure control actuators, hexapod and thermal control system are under developed and will be integrated into the mirror cell assembly by LSST personnel. The entire integrated M1M3 mirror cell assembly will the tested at the Richard F Caris Mirror Lab in Tucson, AZ (formerly Steward Observatory Mirror Lab). }, year = {2016}, doi = {10.1117/12.2234016}, URL = { http://dx.doi.org/10.1117/12.2234016}, eprint = {} }

Financial support for LSST comes from the National Science Foundation (NSF) through Cooperative Agreement No. 1258333, the Department of Energy (DOE) Office of Science under Contract No. DE-AC02-76SF00515, and private funding raised by the LSST Corporation. The NSF-funded LSST Project Office for construction was established as an operating center under management of the Association of Universities for Research in Astronomy (AURA).  The DOE-funded effort to build the LSST camera is managed by the SLAC National Accelerator Laboratory (SLAC).
The National Science Foundation (NSF) is an independent federal agency created by Congress in 1950 to promote the progress of science. NSF supports basic research and people to create knowledge that transforms the future.
NSF and DOE will continue to support LSST in its Operations phase. They will also provide support for scientific research with LSST data.   




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