1 engineering the james webb space telescope paul geithner jwst deputy project manager - technical...
TRANSCRIPT
1
Engineeringthe
James Webb Space Telescope
Paul GeithnerJWST Deputy Project Manager - Technical
March 26, 2011
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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
Sunshield allows the telescope and instruments to get cold
JWST is lightweight and deployable so it can be launched economically
L2 is an ideal place for an infrared observatory
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JWST Design
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Launch Segment
Launch Vehicle
Payload Adapter
Launch Site Services
Ariane Launcher
Provided by NASA
Provided by NG
Provided by Space Telescope Science Institute (STScI)
Provided by ESA
Provided by CSA
The Whole JWST System
Ground Segment
Science and Operations Center (SOC)
Common Systems
Institutional Systems
Deep Space NetworkSpace Telescope Science Institute
Observatory Segment
Optical Telescope Element (OTE)
Spacecraft Element (SE)
Spacecraft Bus
Integrated Science Instrument Module (ISIM)
JWST Observatory
NIRCam NIRSpec FGSMIRI
Sunshield
OTE + ISIM (OTIS)
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Primary Mirror Segments
All 18 flight primary mirror segments and one spare have been 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
Mirror Assembly at BallMirror Assembly at Ball
Coated Primary Mirror at QCICoated Primary Mirror at QCI Preparation for Shipment to XRCFPreparation for Shipment to XRCF
Inspection at Tinsley Inspection at Tinsley
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Primary Mirror Testing
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)
Element Progress
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Secondary Mirror Assembly
Flight Secondary Mirror is through cryogenic deformation testing and is currently in final polishing
Element Progress
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Telescope Structure
Mirror Backplane Pathfinder complete –To be delivered to NGAS 3/11
Flight Deployable Tower AssemblyUnder construction
Flight Secondary Mirror Support Struts fabrication complete
Element Progress
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Telescope Assembly Tooling
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• Critical early demonstration of the primary mirror segment assembly (PMSA) installation process
Simulated Primary Mirror
Segment
Element Progress
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U.S. Science Instrument (NIRCam)
Shortwave Camera LensFirst Fold Mirrors in Cryo Test
Flight Long Wave Filter Wheel
Element Progress
EngineeringTestUnit
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European Space Agency (ESA)Science Instruments (NIRSpec & MIRI)
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Flight Mid-Infrared Imager (MIRI; ESA)
Element Progress
Flight Near-Infrared Spectrograph (NIRSpec; ESA)
Element Progress
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Canadian Space Agency (CSA)Science Instrument (FGS/TF)
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Flight Fine Guidance Sensor/Tunable Filter
Element Progress
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Integrated Science Instrument Module (ISIM)
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ISIM preparing for cryogenic testing
Element Progress
The ISIM holds the science instruments and also provides common services such a power and thermal control
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Telescope Testing Chamber at Johnson Space Center
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Largest simulation of deep space everattempted will be done here
Notice people for scale
Telescope and science instruments installed in the test chamber
Element Progress
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Primary Mirror Segments
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PROGRAM PHASESToday
Concept Development Design, Fabrication, Assembly and Test
FormulationAuthorization
Preliminary Design Review (PDR) / Non-Advocate Review (NAR)(Program Commitment)
Launch
Commissioning / science operations ...
Initial Confirmation Review (ICR)
Phase A Phase B Phase C/D Phase E
Formulation Implementation …
TechnicalNon-Advocate
Review (T-NAR)
Critical Design Review (CDR)
Backplane Center Sections – PF and Flight
1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019
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• 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.
Program Status
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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
Summary
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JWST is Awesome!