1 Ritva Keski-Kuha JWST Deputy OTE Manager May 19, 2009 JWST OTE Development Status JWST-PRES

2 Topics 1.OTE Architecture Refresher 2.Mirror Status 3.Backplane Status 4.I&T Status 5.Schedule 6.Summary

3 SM Support Structure (SMSS) Deployable four-bar linkage strut assembly Secondary Mirror Mount (SMM) Thermal Management Subsystem (TMS) Panel Roof Radiators Panel +/- V2 Radiators ISIM Enclosure (MLI) Parasitic Tray Radiator Aft Optics Subsystem (AOS) Fixed tertiary mirror Fine steering mirror Baffle and pupil mask SM Assembly (SMA) Low mass Beryllium mirror 6 DoF pose control PM Segment Assembly (PMSA) 18 low mass Beryllium mirrors 6 DoF pose control Radius of curvature control PM Backplane Assembly (PMBA) Fixed Center Section supports 12 segments Two deployable wings support 3 segments each Deployable Tower Assembly Deployable telescoping tube Two deployable harness trays Cryocooler line accommodation TMS (continued) Deployable “bat wings” Fixed diagonal shield Deployable stray light “bib” Not Shown PMBA thermal management (SLI) WFS&C Subsystem OTE Electronics Subsystem CMU Boxes CJB Box OTE Architecture Overview

4 Three Mirror Anastigmat Optical Design Provides a Wide Field-of-View Tertiary Mirror OTE ISIM Cassegrain focus (V1, V3) origin f/#: 20.0 Effective Focal Length: m PM diameter = 6.6 m (circumscribed circle) V3 (anti-spacecraft) V1 V2 Focal Surface Primary Mirror Secondary mirror Fine Steering Mirror

5 Mirror Status  First Cryo test of Flight mirrors has been completed  Hexapod performed well at cryo, cryo distortions of A1 and EDU at XRCF as expected.  All PMSAs have completed grinding and are in the polishing and testing phase which includes fabrication at Tinsley, Integration and Test at Ball, Testing at the XRCF.  The secondary mirror-1 was shipped from Tinsley to Ball. The mirror figure is below the specification.  Tertiary mirror and Fine Steering Mirror making good progress at Ball.

JWST_ISIM.May.MPR/6 Completed 1 st PMSA Tests at XRCF Photo Credit MSFC JWST_ISIM.May.MPR/1

7 Cryotest #1 Summary  First Cryo Conditioning Cycle, –Mirrors taken to <25K –Measurements made at 28K A1 EDU Cryo-Conditioning Cycle #1 Cryo-Conditioning Cycle #2 Measurement Cycle

8 Cryo-Deformation of EDU EDU CRYO (Piston, Tilt, Power, Astigmatism, Gravity Removed) EDU AMBIENT (Piston, Tilt, Power, Astigmatism, & Gravity Removed) Temperature = 292K Dataset: AB Cryo-Deformation (Piston, Tilt, Power Removed) Astigmatism RMS: nm rms Mid/Low Figure RMS: 82.0 nm rms High Freq Figure RMS 25.0 nm rms MEASUREMENTS DIFFERENCE Total Cryo-deformation = nm rms RoC Change mm mm As-Measured  ROC nm rms 182.0Figure 79.4Astigmatism mm As-Measured  ROC nm rms 163.3Figure 124.7Astigmatism Temperature = 29K Dataset:

9 of 240 BATC MSR 04/29/09 Significant Accomplishments/Status L-3 SSG-Tinsley As of 4/18/09 TM1 EDU SM1 Pathfinder EDU Flight Flight C7 LEGEND Not at L-3 SSG-Tinsley Even Slice Figure Grind Smooth Out Grind Rough / Smooth Out Polish Interleave Fine Figure Polish Shipped to BATC Cryo Null Figure Final Optical Test Delivered – – – – – Pathfinder C5 B8 C6 B3 C1 C2 A1 A6 A5 A2 C4 A3 A4 C3 B5 B6 B7 SM2 B2 FSM

10 mjm-09-tms-0852 Secondary Mirror Assembly Progress SM Hexapod ready for assembly to substrate SM substrate Ball SM Test Optics Tinsley SM Test Optics

11 mjm-09-tms-0852 Tertiary Mirror and Fine Steering Mirror TM substrate and sub-bench TM testing TM in optical test stand FSM in vibration testing

12 mjm-09-tms-0852 Mirror Coating Preparation is Progressing at QCI-Denton New JWST Coating Chamber Coating GSE being loaded into Chamber

13 Structures Status  Backplane making good progress at ATK –Flight Center Section bonding in progress –Pathfinder CS bonding going well  Completed layup and cure of the first Pathfinder SMSS strut  Completed SMM (Secondary Mirror Mount) CDA 4/28/09  Near term reviews –SMSS/PMBA CDA August 2009 –DTA CDA August 2009 –PMBSS CDA September 2009 SMM

14 Tube Billets and SMSS Pathfinder Strut Tube billet storage rack First SMSS Pathfinder Strut

15 Pathfinder and Flight Backplane Assembly

16 I & T Status  Completed CDA for majority of the SSDIF Alignment and Integration Hardware and JSC Test Hardware.  Null lens optics have been ordered  ACF#1 Skip Test execution starting in November 2009 –ACF Mirror Blanks are in procurement  Chamber isolator demonstration is in progress.  PIT Review scheduled for July 2009

17 mjm-09-tms-0852 Ambient Assembly Stand Assembly Support Structures +V1-up Configuration +V1-down Configuration Ambient OTE Assembly Stand & Hardpoint Struts HP Struts Optics Integration Gantry System

18 mjm-09-tms-0852 Test GSE Architecture and Subsystems Space Vehicle Thermal Simulator (SVTS) by NG Hardpoint Offloader Support System (HOSS) Center of Curvature Optical Assembly (COCOA) COCI (MWL interferometer, null, calibration equipment) Autocollimating Flat Mirrors (ACF Assembly) 3 ACFs (actuated motion) Rogue Path Cryo Position Metrology Fiber fed PM Lights Down Rods Upper Suspension Frame (USF) Telescope Tension Rods Optical Telescope Element (OTE Integrated Science Instrument Assembly (ISIM) – (OTIS) Isolation System LN2 and Helium Cryogenic Shrouds N E

19 mjm-09-tms-0852 Architecture Layout Ref. - JSC Chamber A Ref. - OTIS and Thermal Sim(s).

20 of 240 BATC MSR 04/29/09 NGST OTE Intermediate Schedule

21 Summary  First Cryo test of Flight mirrors has been completed  All PMSAs have completed grinding and are in the polishing and testing phase which includes fabrication at Tinsley, Integration and Test at Ball, Testing at the XRCF  The flight backplane fabrication is in progress  CDA for the majority of the SSDIF Alignment and Integration Hardware and JSC Test Hardware has been completed  OTE CDA Scheduled for October 2009