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Engineering the James Webb Space Telescope

Engineering the James Webb Space Telescope. Paul Geithner JWST Deputy Project Manager - Technical. March 26, 2011. JWST Architecture is Driven by Science. JWST sees in the infrared because that is where the science is Large telescope optics collect and focus light

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Engineering the James Webb Space Telescope

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  1. EngineeringtheJames Webb Space Telescope Paul Geithner JWST Deputy Project Manager - Technical March 26, 2011

  2. JWST Architecture is Driven by Science • JWST sees in the infrared because that is where the science is • Large telescope optics collect and focus light • Telescope and Scientific Instruments are cold for sensitivity • Sunshieldallows the telescope and instruments to get cold • JWST is lightweight and deployable so it can be launched economically • L2is an ideal place for an infrared observatory

  3. JWST Design

  4. MIRI The Whole JWST System Ground Segment Observatory Segment Launch Segment JWST Observatory Space Telescope Science Institute Deep Space Network OTE + ISIM (OTIS) Ariane Launcher Science and Operations Center (SOC) Optical Telescope Element (OTE) Launch Vehicle Integrated Science Instrument Module (ISIM) Institutional Systems Payload Adapter NIRCam NIRSpec FGS Common Systems Launch Site Services Spacecraft Element (SE) Provided by NASA Spacecraft Bus Provided by ESA Provided by NG Provided by CSA Sunshield Provided by Space Telescope Science Institute (STScI)

  5. Primary Mirror Segments • All 18 flight primary mirror segments and one spare havebeen fully assembled • 10 of 18 flight primary mirrors are through final polish, 8 through coating • Completed vibration acceptance testing on 5 of 18 flight mirrors • 6 coated mirrors are being prepared for final cryo-optical verification Inspection at Tinsley Mirror Assembly at Ball Coated Primary Mirror at QCI Preparation for Shipment to XRCF

  6. Primary Mirror Testing Element Progress • Completed cryo deformation testing of all flight mirrors (XRCF tests 1-5) • First of three final cryo verification tests starts this April (XRCF tests 6-8)

  7. Secondary Mirror Assembly Element Progress • Flight Secondary Mirror is through cryogenic deformation testing and is currently in final polishing

  8. Telescope Structure Flight Deployable Tower Assembly Under construction Mirror Backplane Pathfinder complete – To be delivered to NGAS 3/11 Element Progress Flight Secondary Mirror Support Struts fabrication complete

  9. Telescope Assembly Tooling Simulated Primary Mirror Segment Element Progress • Critical early demonstration of the primary mirror segment assembly (PMSA) installation process

  10. U.S. Science Instrument (NIRCam) Flight Long Wave Filter Wheel Shortwave Camera Lens First Fold Mirrors in Cryo Test Element Progress Engineering Test Unit

  11. European Space Agency (ESA)Science Instruments (NIRSpec & MIRI) Element Progress Flight Near-Infrared Spectrograph (NIRSpec; ESA) Flight Mid-Infrared Imager (MIRI; ESA) Element Progress

  12. Canadian Space Agency (CSA)Science Instrument (FGS/TF) Element Progress Flight Fine Guidance Sensor/Tunable Filter

  13. Integrated Science Instrument Module (ISIM) The ISIM holds the science instruments and also provides common services such a power and thermal control Element Progress ISIM preparing for cryogenic testing

  14. Telescope Testing Chamber at Johnson Space Center Telescope and science instruments installed in the test chamber Element Progress Notice people for scale Largest simulation of deep space ever attempted will be done here

  15. Program Phases 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 Today ... Concept Development Design, Fabrication, Assembly and Test Commissioning / science operations Critical Design Review (CDR) Phase E Phase A Phase B Phase C/D Initial Confirmation Review (ICR) Technical Non-Advocate Review (T-NAR) Formulation Launch Preliminary Design Review (PDR) / Non-Advocate Review (NAR) (Program Commitment) Authorization … Formulation Implementation Primary Mirror Segments 15 Backplane Center Sections – PF and Flight

  16. Program Status • JWST is well into development. Much of the flight hardware and the critical tooling and facilities needed to assemble and test it have been built or are being built. • JWST’s cost has grown and its development schedule has slipped since 2008 when NASA made cost and schedule commitments to Congress. An independent review was conducted in 2010, and in response some organizational changes have been made and remaining development is being replanned, but work to go is clear and progress continues.

  17. Summary • The JWST team has made much progress and the JWST system is coming together • Final design and construction of flight hardware and critical tooling and facilities is nearing completion

  18. JWST is Awesome!

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