James Webb Space Telescope (JWST) Project Status for the AAS Town Hall Phil Sabelhaus JWST Program Manager January 5, 2010
James Webb Space Telescope (JWST) § § § Organization Mission Lead: Goddard Space Flight Center International collaboration with ESA & CSA Prime Contractor: Northrop Grumman Space Technology Instruments: ― Near Infrared Camera (NIRCam) – Univ. of Arizona ― Near Infrared Spectrograph (NIRSpec) – ESA ― Mid-Infrared Instrument (MIRI) – JPL/ESA ― Fine Guidance Sensor (FGS) – CSA Operations: Space Telescope Science Institute Description § Deployable infrared telescope with 6. 5 meter diameter segmented adjustable primary mirror JWST Science Themes § Cryogenic temperature telescope and instruments for infrared performance § Launch June 2014 on an ESA-supplied Ariane 5 rocket to Sun-Earth L 2 § 5 -year science mission (10 -year goal) www. JWST. nasa. gov End of the dark ages: First light and reionization The assembly of Birth of stars and galaxies proto-planetary systems Planetary systems and the origin of life
JWST Full Scale Model at the GSFC 3
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JWST Compared with other Telescopes § Hubble Space Telescope (HST): – 2. 7 x diameter, 2. 7 x longer wavelength § HST NICMOS: – 189 x Fo. V, – 38 x better sensitivity at K band, 8 x at H band § Spitzer: – 8 x Spitzer diameter – Diffraction limited at 2 microns vs. 6 microns – 8 to 24 x better angular resolution – 10 x lower dark current supports R ~ 1000 at high redshift § Ground: – JWST and GSMT are complementary where capabilities overlap: – HST: Keck diameter ratio ~ JWST: GSMT – Background ~1, 000 x larger on ground at 5 microns Real data: Spitzer 25 hours Simulated: JWST 3 hours 5
JWST Team and Responsibilities Integrated Science Instrument Module (ISIM) – GSFC • Structure – GSFC/ATK • MIRI- JPL & ESA/European Consortium • NIRSpec- ESA/Astrium • NIRCam – U of Arizona/LMATC • FGS/TFI – CSA/COM DEV ISIM Radiators. NGAS/Ball Optical Telescope Element (OTE) – NGAS/Ball Backplane Structure – NGAS/ATK ISIM Electronics Compartment (IEC)GSFC Deployment Tower - NGAS Sunshield – NGAS Membrane – NGAS/SRS Spacecraft - NGAS MIRI Cryocooler – JPL/NGAS Instrument C&DH - GSFC Launch Vehicle & Adapter- ESA/Arianespace Overall Observatory - NGAS 6
JWST System Architecture Communications Coverage Provided For all Critical Events Ariane 5 Upper Observatory – Upper Stage Injects JWST Separation Into Direct Transfer Trajectory Ariane 5 Launch System Observatory Deployments -Solar Array -High Gain/ Medium Antennas -Sunshield -Optical Telescope Element Ka-Band Science Link (Selectable 7, 14, 28 Mbps) S-Band Tlm Link (Selectable 0. 2 - 40 Kbps) S-Band Cmd (Selectable 0. 25, 2 and 16 Kbps) S-Band Ranging S-Band Tlm Link ( 2 Kbps) Ariane PPF S 5 L 2 Lissajous Orbit L 2 Transfer Trajectory S-Band Tlm Link ( 2 Kbps) S-Band Cmd Link (0. 25 Kbps) S-Band Ranging Communications Services for Launch (TDRS, ESA) L 2 Point Deep Space Network NASA Integrated Services Network Space Telescope Science Institute Science & Operations Center GSFC Flight Dynamics Facility 7
Ariane 5 Launch Vehicle § JWST is designed for launch on an Ariane V launch vehicle with a 5 m diameter fairing § Launch from Kourou Launch Center (French Guiana) with direct transfer to L 2 point § Payload launched at ambient temperature with on orbit cooling to 50 K via passive thermal radiators § JWST payload: 6330 kg French Guiana Ariane 5 ECA 8
JWST Master Schedule
Project Status § General: All observatory components have successfully completed their preliminary design reviews Ø ISIM CDR held in March Ø All science instruments have successfully completed their critical design reviews Ø Optical Telescope Element (OTE) CDR held last October Ø Sunshield CDR scheduled for January 2010 Ø Launch Readiness Date is June 2014 and the Mission Critical Design Review is in April 2010 Ø § Observatory: Ø Completed the spacecraft bus PDR Ø Completed the JWST full scale core test Ø Completed the 1/3 Scale Sunshield testing § Optical Telescope Element: § Backplane: § Bonding of flight and pathfinder OTE Primary Mirror Backplane Support Structures (PMBSS) continues 10
Full Scale Core Test Hardware Optical Telescope Element Core Thermal Test Focus Area CORE TEST thermal facsimile Counterbalanc e Weights Lift Sling Spacecraft Bus Top Weldment Center Backplane PTR Radiators Diagonal Shields Sun Shield FLIGHT Observatory IEC Backplane Support Frame (BSF) Stray Light Bib Deep Space Edge Radiator (DSER) Panels Cable Radiator Decagon Test Membrane SS Support Frame Membrane Tensioning System Base Weldment Bus Simulator 11
Core Test Article Testing is Complete Core Test Article Installation on Chamber Lid § § Core Test integration complete – OTE/SC assemblies mated – GSFC radiometers received and installed – He shroud installed, leak checks completed – MLI closeouts complete – Instrumentation installation and checkout complete Cool down started on April 17 th Competed testing on May 26 th Data analysis is complete He Shroud Installation 12
1/3 Scale Sunshield completed testing in December
Telescope Pathfinder and Flight structure at ATK 14
Primary Mirror Segment Status 18 Flight PMSAs (6 A, 6 B, and 6 C segments) are at various stages of completion – All segments have completed the – – – surface grinding processes at Tinsley All but 5 segments have completed the rough polish process at Tinsley 16 flight mirrors have been shipped to Ball from Tinsley for configuration changes, assembly integration and testing 4 flight mirrors have been at the XRCF for Cryo Deformation Testing Next Cryo Deformation test with 5 flight and the completely polished ETU mirrors is scheduled to start in early January A 1 is the first flight mirror in Cryo A 2, A 4 and B 3 during Integration for Cryo Test #2 in the XRCF, August, 2009
Mirror Processing at Tinsley EDU preparing for final polish run C 4 in Flipping Fixture EDU in Optical Test TM in Optical Test
A 2, A 4 and C 3 PMSA’s at the MSFC XRCF
EDU PMSA Completed Final Polishing at Tinsley!
EDU PMSA in it’s Shipping Container
Status of Secondary, Tertiary and Fine Steering Mirrors § Secondary Mirrors – EDU SM is in final testing at BATC and is scheduled for delivery as a pathfinder in March 2010 – Flight SM is in initial rough polishing at Tinsley, pre-cryo testing EDU SM § Tertiary Mirror – Flight TM has completed cryo and integration deformation testing at BATC – Flight TM has begun Cryo Null Polishing at Tinsley TM § Fine Steering Mirror – Flight FSM has successfully completed cryo deformation testing at BATC; the null figure polishing target map is being developed – Cryo Null Polishing of the Flight FSM is scheduled to begin next at FSM
Secondary Mirror (SM) in cryo testing at Ball
Mirror Status at Tinsley Pathfinder EDU Flight C 7 EDU TM 1 B 2 LEGEND SM 1 B 8 Not at L-3 SSGTinsley Figure Grind Smooth Out Grind C 5 Rough / Smooth Out Polish Interleave B 3 A 1 A 6 Even Slice FSM C 1 C 6 A 2 SM 2 A 5 C 2 A 3 Stability / Final Prep Shipped to BATC B 7 A 4 B 5 Cryo Null Figure Final Optical Test C 4 C 3 Delivered – – – Pathfinder B 6 As of 11/30/09
Mirror coating will start at QCI this year § JWST Dedicated Coating Chamber § Chamber and coating qualification on schedule to support flight coating – FSM and TMA will be coated in Feb 2010 – PMSA EDU will be coated in Apr 2010 GSE Mirror Support in Final Steps of Integration and Test Coating Chamber Final Integration Coating Chamber Installed
Sunshield IVA Deployment Testing Kapton Spring Under Load
Stored Sunshield IVA with the OTE Simulator
Program Status and Recent Progress (Continued) § Ground System: Ø Thirty-two Common Command Telemetry Systems (CCTSs) have been deployed around the world to support ISIM, science instrument and spacecraft flight software development and integration and test activities Ø The JWST Certification Facility has been established to test and certify operations products (command procedures, onboard scripts, telemetry monitors, etc) for use before testing against engineering models and flight hardware Ø The Ka band upgrades required to support JWST L&EO and normal operations have been completed at the DSN Canberra and Goldstone sites; the Madrid site has been upgraded and is currently undergoing testing 26
Program Status and Recent Progress (Continued) § Ground Segment: Science instrument teams around the world using their SITS and SIDU systems 27
Program Status and Recent Progress (Continued) § Ground Segment: Observatory I&T Control Room at NGAS 28
Program Status and Recent Progress (Continued) § Ground Segment: JWST Certification Facility 29
Program Status and Recent Progress (Continued) § Integrated Science Instrument Module (ISIM) – Successfully completed ISIM Level CDR in March – ISIM structure delivered to the GSFC in August – ISIM Command Data Handling (IC&DH) unit and Remote Services Unit (IRSU) making good progress § Instruments: – MIRI - MIRI Verification Model (VM) completed it’s second cryo test - Selected flight and spare detectors and built into Focal Plane Module’s (FPM’s) - Instrument shield (for cryo cooler) concept baselined - Flight Model integration underway – NIRSpec - Selection of flight detectors agreed to by NASA & ESA - Development Model (DM) cryo testing is complete; Successful Pre Ship Review held - Flight Microshutter Array and Control Electronics in final testing - Flight Model (FM) integration underway – NIRCam - Selected flight detectors for NIRCam - Build up of the NIRCam Engineering Test Unit (ETU) well underway - Completed the Triplet bonded mount CDR and started bonding the brass board lenses – FGS - FGS flight detectors (including the spare) have been selected - ETU integration is complete; environmental testing is underway - Flight Model integration underway 30
JWST Instrument Engineering, Verification and Development Models NIRSpec DM testing is Complete! NIRCam ETU undergoing I&T FGS EM integration is complete MIRI VM testing is complete! 31
NIRSpec Flight Model started Integration
NIRCam Zn. Se & Ba. Fl Brass Board Optics successfully bonded in new mounts!
Flight ISIM Structure in the SSDIF
ISIM Kinematic Mount Installation
ISIM & OSIM Hardware in the SSDIF ISIM Structure Support and Mobility for OSIM registration and Integration (SAMORAI). OSIM optical bench is mounted in SAMORAI HST VEST Equipment Foreground: theodolites and metrology equipment Center-Left: OSIM optical components (wrapped)
SES Shroud in GSFC Bldg 10 for ISIM Testing 37
MGSE Installed in SES for ISIM Structure Cryotestin He Shroud SES UG ITP Fabreeka Isolators UG Flexures Cryoset Test Configuration (some minor details not correct) GIS Fabreeka Isolators
Major Near Term Milestones § Major near term reviews, tests and deliveries: - Sunshield CDR scheduled for January 2010 Start ISIM Structure cryoset test January 2010 MIRI Structural Thermal Model delivery to GSFC in February 2010 NIRSpec Engineering Model delivery to GSFC in February 2010 FGS Engineering Model delivery to GSFC in March 2010 Flight NIRSpec Micro Shutter Subsystem delivery to ESA in March 2010 MIRI flight Focal Plane System (FPS) delivery to RAL in March 2010 NIRSpec flight Focal Plane System (FPS) delivery to ESA in March 2010 NIRCam Engineering Model delivery to GSFC in April 2010 Mission Critical Design Review in April 2010 IRSU Flight Model delivery in May 2010 ISIM Flight Structure delivery to I&T in August 2010 ISIM Electronics Compartment Flight Model delivery in August 2010
Project Summary § Successfully passed our Confirmation Review the Summer of 2008 § Launch Readiness Date is June 2014 § Engineering or Verification Models for the science instruments are complete or completing integration and test activities § They will be delivered to the GSFC over the next several months § Integration of the flight instruments is underway § Continuing to make good progress on critical path items § Getting ready for our Mission CDR in April 40
ISIM Under Construction IEC Prototype Baffles ICDH ETU (Region 3) IEC Shell in Fabrication IRSU FLT Chassis FGS ETU MIRI VM SM Hexapod NS Flight Integration Flight Structure Kinematic Mounts NIRCam ETU Bench NS FPA Heatstrap
JWST Under Construction Primary Mirror Segment PM Flight Backplane Tertiary Mirror SMSS Pathfinder Strut Fine Steering Mirror ISIM Flight Bench SM Hexapod Secondary Mirror Segment Membrane mgmt Pathfinder membrane IC&DH unit ETU Mid-boom Test 42
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