TMT Construction Proposal - Thirty Meter Telescope

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Fig 11-1: Organization of the TMT Project during construction ...............................................................196 Fig 12-1 - Sample TMT Cost Sheet. .........................................................................................................207 Fig 12-2: Elements of Cost ($M FY06). ....................................................................................................209 Fig 12-3: Elements of Cost by WBS (Level 2). .........................................................................................209 Fig 12-4: Nonlabor Cost Distribution by WBS (Level 2)............................................................................209 TMT Construction Proposal xx
LIST OF TABLES Table 3-1: Enclosed Energy Fractions using NFIRAOS ............................................................................26 Table 4-1: Description of the candidate sites..............................................................................................29 Table 4-2: Uncertainties of the statistical properties of some of the main parameters entering the TMT site decision. ......................................................................................................................................................31 Table 4-3: Deployment dates of the different instruments on the candidate sites......................................31 Table 4-4: Other aspects entering the site decision ...................................................................................32 Table 4-5: Shows the range of values among the sites, thus showing the relative importance of each parameter. Each number has an upper value of 1.0. .................................................................................34 Table 5-1: Achieved science integration time model. .................................................................................38 Table 6-1: Observatory Performance and Operating Conditions................................................................39 Table 6-2: M1, M2 and M3 Mirror Coating Requirements. .........................................................................41 Table 6-3: IRIS Requirements. ...................................................................................................................42 Table 6-4: IRMS Requirements. .................................................................................................................43 Table 6-5: WFOS Requirements.................................................................................................................43 Table 7-1: Optical prescription of the Thirty Meter Telescope....................................................................54 Table 7-2: D 80 on-axis image jitter and blur budget in mas for zenith pointing telescope, at 0.5 μm wavelength. .................................................................................................................................................65 Table 7-3: NFIRAOS on axis RMS wavefront error budget in nm (60 x 60 actuators)...............................66 Table 7-4: Telescope pointing error budget in arcsec. ...............................................................................67 Table 7-5: RMS Pupil alignment error budget in % of pupil diameter.........................................................67 Table 7-6: Observatory top-down 3% unscheduled downtime budget. ......................................................73 Table 8-1: Mass and location of the telescope mounted optical components............................................89 Table 8-2: Material property requirements for the segment blanks. ..........................................................95 Table 8-3: Warping harness correction requirements.................................................................................95 Table 8-4: Preliminary Wavefront Error Budget Allocation for M2 Mirror Figure, before active optics and adaptive optics corrections........................................................................................................................101 Table 8-5: Preliminary requirements for M2 Positioner. ...........................................................................101 Table 8-6: Key Requirements for M3 Assembly .......................................................................................105 Table 8-7: Characteristics of the nested active optic l .............................................................................109 Table 8-8: The error budget terms for active alignment of M1..................................................................112 Table 8-9: Key derived M1CS requirements............................................................................................113 Table 8-10: Aberration/Misalignment uncertainties from atmospheric and systematic errors..................128 Table 8-11: Common services definition...................................................................................................135 Table 8-12: Communications protocol stack.............................................................................................136 Table 8-13: Technologies Selected for Critical AO Components. ...........................................................140 Table 8-14: High-Level Design Choices. .................................................................................................140 Table 8-15: Fundamental AO Design Parameters...................................................................................141 Table 8-16: Specifications for NFIRAOS. .................................................................................................143 Table 8-17: Wavefront error budget..........................................................................................................144 Table 8-18: NFIRAOS Risks and Mitigations...........................................................................................145 Table 8-19: LGSF Requirements. .............................................................................................................146 Table 8-20: NFIRAOS DM requirements vs. Current AO Systems. .........................................................151 Table 8-21: Polar coordinate CCD array requirements. ..........................................................................153 Table 8-22: IR detector array requirements for NGS tip/tilt wavefront sensing. .......................................154 Table 8-23: Early light guidestar laser requirements. ...............................................................................156 Table 8-24: The SRD science instrument suite and its main characteristics............................................159 Table 8-25: Specifications for MOSFIRE-like instrument at f/15 on a 30m telescope..............................165 Table 8-26: Critical AO components for PFI. ............................................................................................170 Table 8-27: Summary of “Hybrid” MOAO architectures suitable for IRMOS. ...........................................173 Table 8-28: TMT science capabilities and supporting AO modes. ...........................................................176 Table 8-29: AM2 requirements summary.................................................................................................176 Table 8-30: Critical AO capability for the NFIRAOS upgrade...................................................................178 Table 9-1: Nascent science operations team............................................................................................182 TMT Construction Proposal xxi
Page 1 and 2: Thirty Meter Telescope Construction
Page 3 and 4: The Thirty Meter Telescope Construc
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: Fig 8-39: A graphical representatio
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
Page 53 and 54: sites, to assess the impact of site
Page 55 and 56: 4.6 Site merit function 4.6.1 Key P
Page 57 and 58: 5 Operational Concepts In the previ
Page 59 and 60: Observatory-based pipelines are now
Page 61 and 62: 6 Observatory Requirements 6.1 Obse
Page 63 and 64: the requirement at zenith. The imag
Page 65 and 66: 6.1.7.4 IRMS Requirements IRMS is a
Page 67 and 68: The enclosure will manage the dayti
Page 69 and 70: 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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TMT Construction Proposal - Thirty Meter Telescope

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