Seismic Isolation System Prototypes Seismometer Pod IDR Ref: A

12/23/ AASI-2 Objectives Present preliminary designs of the seismometer pods –Task 1 of the SEI Prototypes Implementation Plan ( A) Obtain technical concurrence that the preliminary designs are complete enough to begin HAM and BSC configuration tasks –External dimensions of pods –Interfaces to supporting structure –Estimated mass

12/23/ AASI-3 Agenda Design Summary Preliminary Pod Designs Open Issues

12/23/ AASI-4 Design Summary As presented in ASI’s value engineering presentation, ASI’s pod design concept was predicated on round vs. rectangular configuration –Take advantage of heritage UHV technologies Conflat Wire-Seal Pod designs presented will be common to both HAM and BSC prototypes –Stage 1 Single pod concept is now three (3) individual pods –Flexibility in packaging & alignment –Stage 2 Single pod design similar to that presented at the value engineering presentation

12/23/ AASI-5 Preliminary Pod Designs – Stage 1 STS-2 Design Assumptions –Mounting plane is based upon a 16.50” OD Conflat with rotating flange –Lock actuator design is based upon the revised locker database using “bolted” interface –STS-2 Electrical interface of uses a 90 degree connector –External UHV connection is a 4.50” OD Conflat

12/23/ AASI-6 STS-2 POD 16.5” CONFLAT WEIGHT: 136 LB 16.5 IN IN

12/23/ AASI-7 STS-2 POD WITH L-4C 19.56” WIRE-SEAL

12/23/ AASI-8 Preliminary Pod Designs – Stage 1 L-4C Design Assumptions –Mounting plane is based upon a 6.00” OD Conflat –Internal Electrical interface uses a Size 12 connector shell –External UHV connection is a 2.75” OD Conflat

12/23/ AASI-9 L-4C POD 6” OD CONFLAT WEIGHT: 17 LB 8.85 IN 6 IN 1.95 IN

12/23/ AASI-10 Preliminary Pod Designs – Stage 2 GS-13 Design Assumptions –Mounting plane is based upon a 10.00” OD Conflat –Internal Electrical interface uses a Size 12 connector shell –External UHV connection is a 2.75” OD Conflat Two pod styles: “top” and “bottom” mount –Selection of best style will be made during configuration task

12/23/ AASI-11 GS-13 POD 10” CONFLAT BOTTOM MOUNT WEIGHT 83 LB IN 10 IN

12/23/ AASI-12 GS-13 POD 10” CONFLAT TOP MOUNT WEIGHT: 88 LB IN 10 IN

12/23/ AASI-13 Summary Open Issues –ICD Status STS-2 GS-13 L-4C Review Action Items (AI’s)