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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)