Current Safety Status

1. Current Safety Status Phase III Flight Safety Review 12 Jan 2009

2. Flight Safety Review Timeline • Phase 0/I Flight Safety Review – Jun 2000 • AMS-02 VC Leakage SDM – October 2001 • AMS-02 Gauss Limit SDM – October 2001 • AMS-02 Safety TIM – January 2003 • Phase II Flight Safety Review – May 2007 • AMS-02 Hazard Report TIM – October 2007 • AMS-02 NCR TIM – December 2008 • AMS-02 Burst Disk Testing TIM – August 2009 • Phase III Flight Safety Review – January 2010

3. Major Events Since Phase II • Completed manufacturing and assembly of the scientific payload at CERN. • Completed high-level sine sweep testing of the Vacuum Case and completed static and modal testing of the full payload. • Completed installation and functional tests all detectors. • Completed functional test of the magnet, including charging/discharging and filling. • AMS-02 has been manifested on STS-134.

4. Major Changes Since Phase II • Several hazards have been eliminated through design simplifications. • Radioactive elements in the TRD Gas Supply have been removed, eliminating AMS-02-F09. • Remotely Operated Electrical Umbilical Bracket folding mechanism has been removed. • Other hazards have had additional controls added. • Third MMOD shield added to reverse side of TRD Gas tanks. • Magnet maximum operational current reduced from 460A to 424A. • Composite Overwrapped Pressure Vessels have had additional inspections and analysis. • Payload Attachment System has undergone additional analysis and testing.

5. Major Changes Since Phase II • Design of SFHe tank emergency vent changed to correct performance issues • Design modifications presented to PSRP/SRP at special TIM in October 2008. • Significant additional testing performed to validate new design, with final testing witnessed by PSRP representatives. • CGSE configuration and operations modified based on lessons learned during magnet commissioning and CERN operations. • Power Distribution System has been modified to reduce potential current draw during transfer operations. • UPS system returned to vendor for repair and additional testing after qualification testing issues.

6. Major Remaining Milestones • After completion of functional testing at CERN, AMS-02 will undergo EMI and Thermal Vacuum Testing at ESTEC. • Payload will arrive at KSC at the end of March to begin processing for flight. • Installation of STS/ISS interface components (ROEU, grapple fixtures, PAS, etc.) • Off-line and on-line testing of avionics. • Final verification of STS and ISS interfaces.

7. SVTL Overview • Phase II Hazard Analysis listed 636 Safety Verifications. • 417 SVMs were closed or deleted prior to submittal of the Phase III Safety Data Package • 219 SVMs have been relocated to the SVTL. • 64 were planned open work for after the Phase III review. • 16 are open pending NASA approvals. • 34 have since been closed. • 105 remain open. • Most of the remaining 105 planned for rapid closure following review.

8. Phase II Actions and Agreements • Three action items assigned at the Phase II Review. • AI #1 – Fracture Control of the PAS Anti-Rotation Device (JSC/MSWG) • AI #2 – Fatigue Life Requirement (JSC/OB) • AI #3 – SFHe Tank and VC Factors of Safety (JSC/ES) • First two items were closed successfully. Third action item was withdrawn. • Twelve agreements were also defined at Phase II. All twelve have been completed. • Details of each closure rationale have been provided in Section 7.0 of the Phase III Safety Data Package.

9. Presentation Overview • Several systems will be discussed in more detail prior to the hazard report review based on PSRP comments. • Operations • Pressure Systems • Electronics and Power Systems • Batteries • Magnet and Magnetic Fields • Flight Heaters and MLI