LSST Telescope and Site Status
William J. Gressler
Telescope and Site Manager
J. Andrew, J. Barr, F. Delgado, J. DeVries, E. Hileman, M. Liang, P. Lotz, D. Mills,
D. Neill, W. Schoening, G. Schumacher, J. Sebag, O. Wiecha
SPIE 2014
Astronomical Telescopes & Instrumentation
SPIE 2014 • Montreal, Quebec, Canada • June 22nd - June 27th, 2014
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Presentation summary
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Brief status of LSST Project
Description of Telescope and Site (T&S) scope
Status of early major subsystem awards
Review of remaining procurements
Plans moving forward
SPIE 2014 • Montreal, Quebec, Canada • June 22nd - June 27th, 2014
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LSST is prepared to enter into construction
in 2014
• LSST NSF FDR successfully passed in December 2013
• LSST Project in approved federal budget
• LSST at National Science Board in Feb/May 2014
SPIE 2014 • Montreal, Quebec, Canada • June 22nd - June 27th, 2014
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Telescope and Site group part of an
integrated project team
PMO
WBS 1
Data Management
EPO
WBS 2
WBS 5
Commissioning
WBS 6
LSST
Camera
WBS 3
Telescope & Site
WBS 4
SPIE 2014 • Montreal, Quebec, Canada • June 22nd - June 27th, 2014
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T&S scope defined by major subsystems
within detailed WBS
• Current design team grows to support design/build contracts
• Software team to develop OCS/TCS with make/buy decisions
• Concludes with integration/test activities on summit
Design Build Contracts
04C
04C.00
04C.01
04C.02
04C.03
04C.04
04C.05
04C.06
04C.07
04C.08
04C.09
04C.10
04C.11
04C.12
04C.13
04C.14
WBS Name
Telescope and Site Construction
T&S Level 2 Milestones
Telescope System Management
Telescope System Engineering
Summit Facilities and Infrastructure
Dome
Telescope Mount
Mirror Systems
Wavefront and Alignment Systems
Calibration System
Reflective Coating System
Observatory Control System
Telescope Control System
Utilities and Support Equipment
Base Facility and Infrastructure
Telescope Integration and Test
SPIE 2014 • Montreal, Quebec, Canada • June 22nd - June 27th, 2014
Scope
Defined by
WBS
Elements
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The T&S team observatory system baseline
designs meet the LSST mission requirements
30-m Dome
Summit Facility
350-ton Telescope
Controls Survey
Captures Light
Calibrates Conditions
1.2-m Atmospheric Telescope
1,380m2 Service and
Maintenance Facility
Camera Clean Room
Control Room
Coating Chamber
Base Facility
Operations Support
Data Access Center
SPIE 2014 • Montreal, Quebec, Canada • June 22nd - June 27th, 2014
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Important pre-construction work complete
and many early procurements in place
• Work complete:
– Site selection and early preparation
– Mirror substrates acquired (M1M3, M2)
– Calibration telescope obtained
• Contract awards (Phase A/Phase B):
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–
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M1M3 polishing
M2 Cell Assembly (polishing and integrated testing)
Hexapod/Rotator system award
Telescope Mount Assembly award
Summit Facility award pending
• Future awards:
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–
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Dome system
M1M3 mirror cell
Coating chamber system
Calibration spectrograph
Base facility SPIE 2014 • Montreal, Quebec, Canada • June 22
nd
- June 27th, 2014
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LSST to be built on Cerro Pachón in Chile
(chosen in 2006 & all use permits secured)
Central Chile Location
Map
La Serena
port
Coquimbo
La Serena airport
LSST Base
Facility
Puclaro
dam & tunnel
Vicuña
AURA
property
(Totoral)
CTIO
Gemini & SOAR
N
0
10
20 km
SPIE 2014 • Montreal, Quebec, Canada • June 22nd - June 27th, 2014
LSST Summit
Facility
8
Summit facility drawing package complete
to support general contractor selection
• ARCADIS A&E supported Chilean procurement
– Bids received April 2014; vendor recommended
– Planning for site mobilization in late 2014
SPIE 2014 • Montreal, Quebec, Canada • June 22nd - June 27th, 2014
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Facility layout driven by functional
requirements & thermal considerations
• Key features:
– 16-m reinforced concrete pier
– Tapered design with interior platforms
– Vertical lift to support 65-ton M1M3
cart assembly
– Cladding shaped to channel wind
SPIE 2014 • Montreal, Quebec, Canada • June 22nd - June 27th, 2014
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Y
X
Z
SST Ver 3.3 Baseline Design
/2/2011
Compact 3-mirror optical system enables
stiff design to achieve rapid cadence
• LSST booth (#217)
M2 Mirror
Camera
3D Layout
LSST Ver 3.3_Baseline_Design.zm
Configuration 3 of
M1M3
Primary
Mirror
Cross section through telescope and camera
SPIE 2014 • Montreal, Quebec, Canada • June 22nd - June 27th, 2014
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Telescope Mount Assembly (TMA) in final
stages of contract execution with vendor
• Key elements:
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Hydrostatic bearing system, linear drive motor system (az/el)
Coolant/utility lines, Camera cable wrap
Capacitor bank system
Surrogates (camera, M1M3, M1M3 cell, M2)
SPIE 2014 • Montreal, Quebec, Canada • June 22nd - June 27th, 2014
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TMA design provides camera access and
subsystem removal as assemblies
SPIE 2014 • Montreal, Quebec, Canada • June 22nd - June 27th, 2014
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M1M3 optical polishing and final acceptance
testing to be completed this year
SPIE 2014 • Montreal, Quebec, Canada • June 22nd - June 27th, 2014
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M1M3 shipping container complete and
local storage location identified
Vacuum
Pumps
Lifter
Frame
Vacuum
Cups
Mirror Lifter Installed on LBT mirror
LBT Mirror Container Loading
SPIE 2014 • Montreal, Quebec, Canada • June 22nd - June 27th, 2014
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T&S group will procure M1M3 cell and
fabricate support system hardware
• Trial fit at TMA vendor; back to AZ for M1M3 testing
Exploded View
SPIE 2014 • Montreal, Quebec, Canada • June 22nd - June 27th, 2014
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T&S group will fabricate the M1M3 support
system hardware for integrated testing
Hardpoint Actuator
Assembly
Typical Dual Axis
Actuator Assembly
Fan
On–Board Blower Assemblies
(turquoise squares)
B
C
Coolant Supply and Return
Manifolds (copper)
A
F
E
D
SPIE 2014 • Montreal, Quebec, Canada • June 22nd - June 27th, 2014
Heat
Exchanger
Blower Assembly
(telescope horizon pointing)
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Integrated optical testing at SOML planned
before shipment of M1M3 to summit
• SOML provides integration support and facilities
• Full active optics support demonstration and tuning
of thermal control system
M1M3 mirror with fully integrated mirror
support system within the cell
SOML Test Tower
Configuration
SPIE 2014 • Montreal, Quebec, Canada • June 22nd - June 27th, 2014
Previous SOML
Integration Efforts
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M2 Cell Assembly to be fabricated/tested
before shipment to summit
• M2 substrate in near net shape (in turnover box)
• Exelis to provide polishing and integrated optical
testing in mirror cell (CX down orientation)
SPIE 2014 • Montreal, Quebec, Canada • June 22nd - June 27th, 2014
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M2 Hexapod and Camera Hexapod/Rotator
to be fabricated by Moog/CSA
SPIE 2014 • Montreal, Quebec, Canada • June 22nd - June 27th, 2014
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Early efforts to determine final strut design
and rotator bearing components
SPIE 2014 • Montreal, Quebec, Canada • June 22nd - June 27th, 2014
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Dome system procurement planned for
release in Fall 2014
• Key features:
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Oversized bi-parting aperture shutter
Integrated light/wind screen, louvered vent system
Rear access doors, overhead crane system
Az drive system (crawl), capacitor bank system
Aperture Shutters (ApS)
Light/Wind Screen (LWS)
Louvered Light Baffling
Vents (LLBV)
Rear Access Doors
(RAD)
SPIE 2014 • Montreal, Quebec, Canada • June 22nd - June 27th, 2014
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Coating chamber on summit provides
enhanced aluminum via rotating magnetrons
• Subsystem procurement in 2015
• M1M3 cell functions as lower vacuum vessel
• M2 removed from cell for coating
SPIE 2014 • Montreal, Quebec, Canada • June 22nd - June 27th, 2014
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Includes mirror strip/clean station and
additional lower vessel to coat M2
SPIE 2014 • Montreal, Quebec, Canada • June 22nd - June 27th, 2014
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Base facility and data center designs driven
by Operations plan and DM needs
SPIE 2014 • Montreal, Quebec, Canada • June 22nd - June 27th, 2014
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T&S team responsible for calibration screen
system within dome
• Diffuse screen illuminated by tunable laser source
– Two arrays of projectors overfill pupil
– Measured output via NIST-calibrated photodiodes
• Additional broadband collimated source
SPIE 2014 • Montreal, Quebec, Canada • June 22nd - June 27th, 2014
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Kitt Peak Calypso 1.2-m telescope relocated
to Tucson facility to enable refurbishment
• Utilities and pier provided by summit facility vendor
• Nasmyth ports used for spectrograph and SHWFS for alignment
• PWV measurement (GPS/microwave radiometer ) and cloud
monitoring via visible/IR all-sky (ASIVA)
SPIE 2014 • Montreal, Quebec, Canada • June 22nd - June 27th, 2014
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Custom inner loop controller (ILC) electronics
developed to provide common interface
• ILCs intended for use with any actuator within TMA
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M1M3 electromechanical hardpoints
M1M3 pneumatic actuators
M1M3 thermal control units
M2 electromechanical axial actuators
M2 electromechanical tangent links
M2 tangent link strain gauges
General protocol converter for non-standard serial digital devices
SPIE 2014 • Montreal, Quebec, Canada • June 22nd - June 27th, 2014
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Software team to develop OCS/TCS
software deliverables
• Control architecture based on data distribution system
using communications middleware
• Scheduler prototyping via OpSim effort
• Cadence workshop in August to engage community
SPIE 2014 • Montreal, Quebec, Canada • June 22nd - June 27th, 2014
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Significant progress on curvature WFS code,
guiding, and alignment strategies
• Edge of FOV detectors provide wavefront/guider data
• Major optical axes capture via laser tracker SMRs
SPIE 2014 • Montreal, Quebec, Canada • June 22nd - June 27th, 2014
30
Telescope system integration activities
defined for initial 3-mirror testing
• Repeat M3 optical test on TMA under full active
control as zenith pointing (with PhaseCam)
• Install integrating structure with SHWFS
• Perform on-axis 3-mirror telescope alignment
(diffraction limited on-axis by design)
M3 Interferometer
Shack-Hartmann WFS
SPIE 2014 • Montreal, Quebec, Canada • June 22nd - June 27th, 2014
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The Telescope and Site plan is aligned with
the overall Integrated Project Schedule
Dome
Complete
Mount
Complete
Summit
Complete
3-Mirror
Testing
Install
Camera
Science
Verification
Early
Completion
Start Early
Commissioning
with ComCam
SPIE 2014 • Montreal, Quebec, Canada • June 22nd - June 27th, 2014
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Moving into construction will require help
• LSST hiring campaign kick-off
• T&S Tucson team almost doubles in size
– Additional space within NOAO (offices/labs)
– Office in La Serena established
• Transition to Chile as major subsystems arrive and
are integrated
• T&S resources transition into Commissioning and
eventually Operations
The LSST Project is Ready for Construction
SPIE 2014 • Montreal, Quebec, Canada • June 22nd - June 27th, 2014
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Thank you
SPIE 2014 • Montreal, Quebec, Canada • June 22nd - June 27th, 2014
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