Seismic Isolation System Prototypes

Seismometer Pod IDR

12-23-03

Ref: 20008277-A

12/23/2003 - 20008277-A ASI-2

Objectives

• Present preliminary designs of the seismometer pods – Task 1 of the SEI Prototypes Implementation Plan (20008174-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

12/23/2003 - 20008277-A ASI-3

Agenda

• Design Summary

• Preliminary Pod Designs

• Open Issues

12/23/2003 - 20008277-A ASI-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

12/23/2003 - 20008277-A ASI-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

12/23/2003 - 20008277-A ASI-6

STS-2 POD

16.5” CONFLAT

WEIGHT: 136 LB

16.5 IN

11.07 IN

12/23/2003 - 20008277-A ASI-7

STS-2 POD

WITH L-4C

19.56” WIRE-SEAL

12/23/2003 - 20008277-A ASI-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

12/23/2003 - 20008277-A ASI-9

L-4C POD

6” OD CONFLAT

WEIGHT: 17 LB

8.85 IN

6 IN

1.95 IN

12/23/2003 - 20008277-A ASI-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

12/23/2003 - 20008277-A ASI-11

GS-13 POD

10” CONFLAT

BOTTOM MOUNT

WEIGHT 83 LB

15.49 IN

10 IN

12/23/2003 - 20008277-A ASI-12

GS-13 POD

10” CONFLAT

TOP MOUNT

WEIGHT: 88 LB

15.45 IN

10 IN

12/23/2003 - 20008277-A ASI-13

Summary

• Open Issues– ICD Status

• STS-2

• GS-13

• L-4C

• Review Action Items (AI’s)