TMT Construction Proposal - Thirty Meter Telescope

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© 2007 TMT Observatory Corporation All Rights Reserved TMT Observatory Corporation 2632 E. Washington Blvd. Pasadena, CA 91107 TMT Document Number: TMT.PMO.MGT.07.009 TMT Construction Proposal ii
The Thirty Meter Telescope Construction Proposal The TMT Board has established an External Advisory Panel (EAP) to periodically review the progress of the TMT Design and Development Program (DDP). In June 2007, the TMT Board requested the EAP to assess the proposal to construct TMT together with the plans to achieve construction readiness and to conduct early operations of the TMT Observatory. The EAP was charged to review the science cases, science requirements, and observatory requirements. They were asked to review recent observatory design changes, and to evaluate the proposed design against the requirements, and to assess readiness for construction. They were also asked to comment on the site testing and site selection process. The panel was asked to comment on the state of operations planning and the operational model for the observatory, as well as to evaluate the plan for TMT as an upgradeable observatory. The EAP was asked to assess the state of the project management, organization, estimated construction costs and the strategy for phasing the entire TMT program from design and development, construction, through commissioning and early operations. The TMT project prepared The Thirty Meter Telescope Construction Proposal for this review. In this document, the project summarizes work completed to date and provides an implementation roadmap. It begins with the science cases and science-driven requirements that motivate the TMT design. This is followed by high-level operational concepts, technical requirements, and observatory architecture description. Detailed descriptions of the observatory sub-systems are followed by concepts for system assembly, integration and verification followed by a description of how the observatory will be operated. The proposal concludes with an overview of how the project will be organized and a summary of project cost. The TMT project plans to update this proposal over the next 12 – 18 months as TMT design work and implementation planning are completed. This version of the proposal omits some information that is proprietary to the project. TMT Construction Proposal iii
Page 1: Thirty Meter Telescope Construction
Page 5 and 6: LIST OF CONTRIBUTORS Bob Abraham Ed
Page 7 and 8: Jonathan Tan Tommaso Treu Jean-Pier
Page 9 and 10: CONTRIBUTING COMPANIES Ball Aerospa
Page 11 and 12: 2.10.3 Atmospheric physics of the o
Page 13 and 14: 7.4.2 Image size budget for seeing
Page 15 and 16: 8.6.2 Wide-Field Optical Spectrogra
Page 17 and 18: LIST OF FIGURES Fig 1-1: The telesc
Page 19 and 20: Fig 8-39: A graphical representatio
Page 21 and 22: LIST OF TABLES Table 3-1: Enclosed
Page 23 and 24: TMT Construction Proposal 1 Impleme
Page 25 and 26: However, TMT will be the first grou
Page 27 and 28: 2 Science Motivation 2.1 Introducti
Page 29 and 30: necessarily have smaller apertures.
Page 31 and 32: 2.3 The early Universe The expansio
Page 33 and 34: e possible to simultaneously map th
Page 35 and 36: 2.7.1 Black holes in galactic nucle
Page 37 and 38: 2.8.3 Protoplanetary disks Protopla
Page 39 and 40: 2.9.3 Atmospheres of massive planet
Page 41 and 42: 3 Science-Based Requirements 3.1 Ov
Page 43 and 44: Fig 3-3: The PSF of a 30m circular
Page 45 and 46: Fig 3-4: Fractional science degrada
Page 47 and 48: Sometimes it is necessary to offset
Page 49 and 50: Ground Layer Adaptive Optics (GLAO)
Page 51 and 52: Fig 4-1: Views of the five TMT cand
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sites, to assess the impact of site
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4.6 Site merit function 4.6.1 Key P
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5 Operational Concepts In the previ
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Observatory-based pipelines are now
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6 Observatory Requirements 6.1 Obse
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the requirement at zenith. The imag
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6.1.7.4 IRMS Requirements IRMS is a
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The enclosure will manage the dayti
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Each center would have a remote obs
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6.2.1.2 Traceability The requiremen
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7 System Design and Performance Thi
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Segment size Extensive trade studie
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Fig 7-2: Telescope layout. 7.2.3 Na
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Fig 7-5: Elevators providing access
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7.3.1 Control architecture Pointing
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wavefront corrections for multiple
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7.3.3 Acquisition Acquisition is th
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Table 7-2: D 80 on-axis image jitte
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Table 7-4: Telescope pointing error
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The pertinent metrics (RMS and P-V
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time-scale ambient temperature beha
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downtime for critical and redundant
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8 Observatory Description In this c
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8.1.3.8 Support Facilities The Supp
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8.1.5.5 8.1.5.6 Room Room Mirror St
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8.2 Enclosure 8.2.1 Overview The TM
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The TMT enclosure structure was ana
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8.2.3.6 Aperture Flaps One of the m
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and they are provided through cable
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Fig 8-16: Structural Placement for
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lines and cryogenic hoses are stack
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The optical performance of the segm
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The TMT AO-corrected wavefront erro
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Retro-reflectors (e.g. “cat-eyes
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8.3.3 Secondary Mirror Assembly 8.3
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Table 8-4: Preliminary Wavefront Er
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TMT plans to contract separately fo
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The mirror supports and positioner
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• M1 Control System (M1CS) • Mo
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Table 8-7: Characteristics of the n
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systems based on commands received
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Conceptual Design Description and O
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The actuator design is based on a p
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Fig 8-36: Residual in-plane error m
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etween individual segments that can
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Fig 8-39: A graphical representatio
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8.3.5.8 Commissioning Acquisition a
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The conceptual design of the PFC is
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narrowband algorithm except that th
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semi-analytic raytrace code, and th
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each will be mounted in an enclosur
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Fig 8-48: A COTS handling fixture t
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• Use common communications (midd
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• Build tools and build process s
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several more innovative concepts wh
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Parameter Table 8-15: Fundamental A
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The natural visible light continues
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Table 8-18: NFIRAOS Risks and Mitig
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Fig 8-57: Functional block diagram
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transport the laser beams could dra
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8.5.3 Early Light AO Components 8.5
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specifications for quantum efficien
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Fig 8-63: NFIRAOS RTC functional bl
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The requirements given in Table 8-2
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Table 8-24: The SRD science instrum
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pupil at the grating will have a di
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The design of the IRIS imaging chan
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corresponding numbers at f/15 on a
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1 J 1 H 0.8 0.8 EE 0.6 0.4 on−axi
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The main PFI requirements listed in
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science objectives require a high (
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AO Development Both IRMOS concepts
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footprint of the current HROS-CU de
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fabrication risks, while still meet
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[22] Review Committee Report on the
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During the last 24 months of TMT AI
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Fig 9-1 reflects AIV, which is a co
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Fig 9-4: Base shell erected. Fig 9-
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M3 support elevation journal M1 cel
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10 Observatory Operations Although
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Table 10-1: General science operati
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Table 10-2: TMT Staffing Plan. Staf
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11 Project Execution Plan 11.1 Obje
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The System Engineer is responsible
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11.8 Environment, Safety, Health an
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corrective actions. One monthly pro
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11.18 Publication and Dissemination
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ES&H ETC EV ExAO FEA FD PCG FDR FIF
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SFG SPHERE SiRD SKA SMP SMP SNR SOD
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