TPF-C Technology Plan - Exoplanet Exploration Program - NASA

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Figure i-4. Deformable mirror delivered by Xinetics to the HCIT. The very recent development and adoption of an eighth-order mask design to replace the fourthorder masks previously baselined have had a major impact on the design and the 2005 technology plan detailed here. At the expense of some system throughput, the system sensitivity to aberrations is greatly reduced, by more than two orders of magnitude in some cases, as summarized in Table i-1. This translates into relaxation of a number of the more challenging mechanical and thermal requirements on the system. This development originated with an outside collaborator funded through a university contract and was eagerly adopted by the project. Table i-1. Selected Error Budget Terms at Contrast = 1 × 10 -12 at 4λ/D Aberration New (8 th Order) Old (4 th Order) Relaxation Ratio Tilt 4.3 × 10 -2 2.7 × 10 -3 16 Focus 3.8 × 10-3 2.9 × 10 -5 132 Astigmatism 5.3 × 10-3 4.0 × 10-5 132 Coma 1.0 × 10 -3 5.6 × 10 -6 185 Trefoil 2.3 × 10 -3 1.7 × 10 -5 132 Spherical 3.5 × 10 -5 4.9 × 10 -6 7.2 *Aberration units are waves rms at 550 nm. viii
Acknowledgements The Technology Plan for the Terrestrial Planet Finder Coronagraph has been put together with the efforts of many individuals. The editors are pleased to acknowledge contributions at the Jet Propulsion Laboratory by Virginia Ford, Andrew Lowman, Stuart Shaklan, Marie Levine, Rhonda Morgan, Bala Balasubramanian, Douglas Lisman, Joseph Green, Eri Cohen, John Trauger, B. Martin Levine, Mary White, James Alexander, Zakos Mouroulis, Greg Moore, Allan Eisenman, and Karl Stapelfeldt; and at the Goddard Space Flight Center by Dave Content, Andy Smith, Clifton Jackson, Alice Liu, Carl Blaurock, Claef Hakun, Chuck Bowers, Lou Fantano, and Jordan Camp. Contributions by Industry Contractors Larry Dewell (Lockheed Martin) and Terry Cafferty (TC Technologies) are also gratefully acknowledged. The TPF Project is also pleased to acknowledge the constructive criticism and support of the TPF Technology Advisory Committee, listed in Appendix D, and the Navigator Program’s External Independent Readiness Board, chaired by Vernon Weyers. ix
Page 1 and 2: JPL Publication 05-8 Technology Pla
Page 3: TECHNOLOGY PLAN TERRESTRIAL PLANET
Page 6 and 7: Recent Highlights Technical progres
Page 10 and 11: Table of Contents Approvals........
Page 12 and 13: 7.5.2 Precision Hexapod............
Page 14 and 15: Chapter 1 Figure 1-1. Artist's impr
Page 16 and 17: Chapter 1 interferometry, continues
Page 18 and 19: Chapter 1 Back end coronagraph opti
Page 20 and 21: Chapter 1 Surrounding the whole tel
Page 22 and 23: Chapter 1 Pol. BS fold/steering Mic
Page 24 and 25: Chapter 1 1.6.5 Sunshield The teles
Page 26 and 27: Chapter 1 expected architecture dow
Page 28 and 29: Chapter 1 Table 1-3. TPF-C Technolo
Page 30 and 31: Chapter 1 3B: Demonstrate, using th
Page 32 and 33: Chapter 2 2 Error Budgets 2.1 Contr
Page 34 and 35: Chapter 2 Error Budget Validation G
Page 36 and 37: Chapter 2 Further, it is shown that
Page 38 and 39: Chapter 2 Table 2-1. Requirement on
Page 40 and 41: Chapter 3 3 Optics and Starlight Su
Page 42 and 43: Chapter 3 are in progress with cont
Page 44 and 45: Chapter 3 Figure 3-5. Coronagraph s
Page 46 and 47: Chapter 3 (though not light-weight
Page 48 and 49: Chapter 3 Table 3-3. ITT Metrology
Page 50 and 51: Chapter 3 observations. The time it
Page 52 and 53: Chapter 3 vacuum-compatible, low-po
Page 54 and 55: Chapter 3 blank size. Westerhoff et
Page 56 and 57: Chapter 3 configurations, performan
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Chapter 3 Figure 3-10: Plots showin
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Chapter 3 The wavefront quality of
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Chapter 3 Figure 3-13. Optical layo
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Chapter 3 algorithms have limitatio
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Chapter 3 simulated star source is
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Chapter 4 Figure 4-1. Overview of t
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Chapter 4 enclosures, and stable la
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Chapter 4 facilities from which dat
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Chapter 4 Figure 4-5. Microslip Tri
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Chapter 4 Figure 4-7. Calibration o
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Chapter 4 Figure 4-8. Comparison of
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Chapter 4 4.2 Subsystem and System
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Chapter 4 Figure 4-11. Schematic of
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Chapter 4 Figure 4-12. Fine guiding
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Chapter 4 (5) The Fine Steering Mir
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Chapter 4 Third, precise thermal co
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Chapter 4 giving confidence that fl
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Chapter 4 surface polish is nonethe
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Chapter 5 TPF-C is planning a suite
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Chapter 5 engineering judgment (i.e
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Chapter 5 categories, in reality ea
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Chapter 5 Table 5-3. Validation of
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Chapter 5 5.6.1 Modeling Methodolog
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Chapter 5 strength of computer simu
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Chapter 6 6 Instrument Technology a
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Chapter 6 Figure 6-1. Detailed conc
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Chapter 6 The first method is self-
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Chapter 6 super computers and is us
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Chapter 7 7 Plan for Technology Dev
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Chapter 7 Figure 7-1. TPF-C Technol
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Chapter 7 Improvements to the DM ov
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Chapter 7 7.3 Error Budgets 7.3.1 D
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Chapter 7 7.4 Optics and Starlight
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Chapter 7 7.4.2 Apodizing Masks and
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Chapter 7 7.4.4 Wavefront Sensing a
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Chapter 7 7.4.6 Transmissive Optics
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Chapter 7 7.4.8 Scatterometer Scope
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Chapter 7 7.5 Structural, Thermal,
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Chapter 7 7.5.3 Precision Structura
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Chapter 7 model of TPF-C and should
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Chapter 7 7.5.6 Secondary Mirror To
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Chapter 7 7.5.8 Sub-scale EM Sunshi
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Chapter 7 7.6 Integrated Modeling a
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Chapter 7 7.7.3 Advanced Concepts:
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Chapter 8 134
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Appendices Appendix B: TPF-C Detail
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Appendices Appendix D: TPF-C Techno
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Appendices Appendix F: Acronym List
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Appendices RWA SAO SBIR SIM SM SMFA
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TPF-C Technology Plan - Exoplanet Exploration Program - NASA

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