TELESCOPE AND SITE UPDATE

Sandrine Thomas (T&S Project Scientist) &

Telescope and Site Team

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Telescope and Site Subsystem

TMA(EA)

Hexapods(Moog/CSA)

M1M3(SOML)

M1M3 Mirror Cell

(TBD)

M2(Harris)

Dome(EIE)

Summit A&E Construction

(Arcadis/Besalco)

Base Construction

(TBD)

Auxiliary Telescope and

Calibration

Coating Plant (TBD)

Active optics SystemSoftware

Schedule

Summit Construction

DomeConstruction

MountConstruction

Dome Integration

M1M3 Cell Weldment

MountFactory Test

Mount Integration

Telescope Integration

M1M3 Assy Ship to Chile

Telescope On-Sky Testing

Summit Construction

DomeDesign

MountDesign

Dome Integration

Coating Plant Design

Mount Integration

Telescope Integration

On Summit Coatings

Telescope ComCam On-Sky Testing

M1M3 Cell Hardware

M1M3 Assy Optical Testing

M2 Cell Assy Design

Mount Fabrication

Dome Fabrication

Mount Factory Test

M2 Cell Assy Fabrication

M2 Cell Assy Optical Testing

M2 Assy Ship to Chile

Calypso Refurbishment

Calibration Instrument Fab

Calibration Instrument Test

2015 2016 2017 2018 2019 2020

Coating Plant Construction

Breakout: Monday 11am-12:30pm

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Summit Facility Status• January 2015: Contract for construction was initiated with Besalco

Construcciones (Chilean)• Major excavation is now almost complete – after major remediation of

subsurface rock/soil conditions under the building.• Initial foundation work and raising of columns is in progress.• Major equipment approved for purchase –

electrical transformer, generator, cranes.

• Structural steel fabrication subcontract initiated.

• Work force ofover 50on site daily

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Base Facility Status• May 2015: Requirements for Base Facility in La Serena Chile were

finalized with input from Data Management team.• Cooperation in project with AURA and NOAO-S was formalized.• Requirements for Data Center were defined by DM and T&S teams.• July 1st: Request for Proposals for Architectural and Engineering

Services was issued, proposals received. Recommendation of committee has been forwarded for approval.

• September 2015: Anticipate start of design of Base Facility

• ~ October 2016Anticipate start of construction Design concept layout from one of the Proposals

Dome Status

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• May 2015: Design-Build Contract with European Industrial Engineering (EIE) was signed

• May 27-28: Kick-off meeting was held at EIE offices in Mestre, Italy • Early emphasis was placed on interface

to building (already in construction!) and definition of major subsystems.

Early progress has included:• Verification of mass budget for dome.

Initial finite element analysis.• Definition of mounting plates and

anchor bolts to lower enclosure.• Location and sizing of drive units

and bogies.Breakout: Monday

1:30pm-3pm

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Telescope Mount Assembly (TMA): Preliminary Design

• Design Contractor: Empresarios Agrupados (Madrid Spain)

• Fabricator: Asturfeito (Asturias, Spain)

• LSST Telescope and Site Manager: Shawn Callahan (Tucson, Az)

Dynamic performance meets all TMA requirements.

Year Milestone Date

2015 Preliminary Design Review 80% completion

September 28-October 2

2015 Final Design review by subsystems

October 30 – December 28

2016 Azimuth track and concrete pier complete

April 15

2016 All TMA components ready for installation

December 23

2017 Factory testing review March 1

2017 All hardware delivered to port

July 15

2018 TMA assembled at site May 1

2018 TMA testing complete on site

July 15

Breakout: Monday 1:30pm-3pm

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M1M3 Acceptance (April 10th 2015)

More information here:Collection-3272,Document-18055

Breakout: Tuesday 11am-12:30pm

SOML

- Interferometric measurements done by SOML: surface uniformity and figure accuracy for both M1 and M3 meet or exceed requirements.

- Position of M1 relative to M3 within tolerance- Radii of curvature, conic constants ….. are

within tolerance.- Existence of small additional residuals: studies

show a negligible scientific impact.

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M1M3 Mirror Storage in Tucson

Plan to visit/inspect mirror every 1.5-2 months

May 20 2015

July 23 2015

Arrival at Storage Facility Final Placement of the mirror container

Last Inspection at Storage Facility

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M1M3 Acceptance (April 10th 2015)

2017: Before Shipping to Chile, M1M3 + cell+mirror support system will be tested at SOML with the same interferometric testing configuration

SOML

- Interferometric measurements done by SOML: surface uniformity and figure accuracy for both M1 and M3 meet or exceed requirements.

- Position of M1 relative to M3 within tolerance- Radii of curvature, conic constants ….. are

within tolerance.- Existence of small additional residuals: studies

show a negligible scientific impact.

More information here:Collection-3272,Document-18055

Breakout: Tuesday 11am-12:30pm

M1M3 on Telescope

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Location of the M1M3 Cell and Mirror on the Telescope

Mirror supported on Cell

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• Mirror Wt: ~17000 kg• Total Wt (Mirror + Cell + Internals): ~53000 kg• Key systems:

Gravity support and figure control force actuators: pneumatic support actuators Hardpoint Struts to locate mirror Thermal control via cooling air injection into mirror cores

Breakout: Tuesday 11am-12:30pm

July: RFP sent out August 14th: received answersOctober: anticipates answers to the vendors

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Mirror M2

Before shipping of the M2 mirror to Chile, the M2 mirror cell assembly (mirror+cell+mirror support system) will be tested in Rochester NY in the downward orientation, the same configuration used during ion figuring.

Breakout: Tuesday 11am-12:30pm

Sept 2017: Expected completion by Exelis

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Hexapods & Rotator Status• Aug 11th-12th 2015: Interim Mechanical Review conducted (equivalent to

critical design review) with no significant issues determined.• Late 2016: Systems scheduled for completion

Breakout: Monday 1:30pm-3pm

FlexureEnd Joints

Strut Designed for M2 & Camera Hexapod

Coating Plant Design Review

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• June 29th 2015: Coating Plant Design Review heldReview covered baseline designs of the cleaning and stripping equipment and the magnetron coating chamber. Requirement on the coating (both Aluminum and Silver)

• July 2015: Coating Plant System RFP. A good variety of vendors expressed interest in the project.

• Sept. 11th 2015: Vendor proposals are due

• January 2016: Expect contract award.

Breakout: Monday 1:30pm-3pm Collection-2458 in Docushare

T & S Software Status

• Integration status:– SAL software utilized successfully in CCS, DMCS and

OCS communications tests.– OCS Sequencer updated to latest device state

model, as well as commanding and scripting.– ICD conformant interface simulators for major

subsystems developed.– XML schemas developed for SAL and OCS.– LSE-70 and LSE-209 communications documents

updated and to be submitted to CCB

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T & S Software Status

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Breakout: Tuesday 1:30pm-3pm

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• OCS Scheduler– Scheduler requirements document delivered.– OPSIM and Scheduler redesign of development

achieved.• TCS status:

– Development planning in progress.– SAL software delivered to contractors of Mount, Dome,

Hexapod/Rotator, M2.– Vendor ICDs updated to integration agreed model.– 3 Inner Loop Controller test stands completed.

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1818

LSST Active Optics & Wavefront Sensing

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LSST Active Optics System (AOS):• Maintain system alignment • Maintain surface figure on three mirrorsChallenges:• 61% Central Obstruction• f/1.23• Off-axis Distortion & Vignetting(~1.7o)• Field Dependence (covering 1.51° to 1.84°)

Camera

Secondary Mirror

Primary/TertiaryMirror

Camera

Secondary Mirror

Primary/TertiaryMirror

Degrees Of Freedom controlled by AOS• M2 hexapod rigid body positions• Camera hexapod rigid body positions• M1M3 bending modes• M2 bending modes

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AOS status and next steps Publication of the update to the basic curvature sensing algorithm

by Bo Xin (large central obscuration, small f/number, distortion and vignetting)

Working on the Active Optics System requirements document– Wavefront Estimation Pipeline (WEP) part of WBS 4.7– Active Optics Control System (AOCS) part of WBS 4.11

WEP: 100% successfully translated from Matlab to Python Start engaging work with the DM subsystem to incorporate

optimization of the WEP in the DM framework. AOCS: algorithm is written in Matlab to be translated into Labview Include the telescope models and use PhoSim to built the look-up-

table (temperature, elevation and azimuthal angle).Final delivery is scheduled for the end of Oct 2019

Breakout: Tuesday 11am-12:30am

Calibration Effort

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• New Hire: Patrick Ingraham– Calibration Hardware Scientist– Leading calibration hardware

development with Chuck Claver

• Recent Calibration Re-planning• Auxiliary Telescope (Calypso)

Refurbishment expected to start in October 2015

• Modification to the spectrograph design to offer increased cadence, versatility, flexibility

• Developing a Collimated Beam Projector (CBP): Will map transmission as a function of field position, pupil position and wavelength

Breakout: Wednesday 9am-10:30am

Service Building

Coating Plant Installation

M2 Inspection

M2 coating

M2 integration in Cell

M1/M3 inspection

M1/M3 integration

in Cell

M1/M3 coating

Mount Integration

Mount Testing

M1/M3 integration in

MountM3 Tests

M2 integration on Top End

3-Mirror Telescope

Testing

Mount Science Camera

Lower Enclosure

Completion

Dome Installation

FACILITIES

MOUNT

M2 M1/M3

TELESCOPE INTEGRATION

CAMERA

Integrating Structure

Installation

SHWFS Installation

TCS(Pointing,

Mount, Alignment, Operator)

TCS(Active Optics)

OCS(Main

Controller, Sequencer, Operator)

Commission Camera Utilities

Base Facility& Fiber Network

DM Infrastructure at Base Facility

DM Network Mountain to Base

DM End-To-End Test from

Mountain to Base

Support Building

Control Room

DM NETWORK

Camera Testing in

Lab

Camera Lab Facility

Camera Inspection

Calibration telescope

Calibration Screen

commission

CALIBRATION

Facility Alignment System

M1M3 Surrogate Mirror integration

in Mount

Calibration Screen

Installation

M1M3 Cell dismounted from

the Mount

ComCam Commissioning

Final System Commissioning

DOME

COMMISSIONING

Integration sequence in phase with subsystems delivery

Integration and Test Plan (LTS-104) describes the general strategy, includes the integration and test sequence and provides a summary for all major key activities.Three Major Phases:Phase 1 (P1): Heavy ConstructionPhase 2 (P2): Mirrors Coating and IntegrationPhase 3 (P3): Alignment Phase

START

ENDP1

P2P3

Breakout: Tuesday 3:30pm-5pm

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Conclusion

• It’s been a busy year with among others:– Start of construction– M1M3 acceptance and transportation to storage– Lots of new hires

• Next:– Final contracts being awarded– Calibration Hill getting more active– Integration Plans– Operation Plans

We will use more actively the documentation Control

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We’re heading south no matter the obstacles…