TBM Vacuum considerations Alex Vamvakas 15/07/2015.
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Transcript of TBM Vacuum considerations Alex Vamvakas 15/07/2015.
TBM Vacuum considerations
Alex Vamvakas15/07/2015
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Outline• Existing system• Proposed changes• Points to be discussed
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T0 vacuum systemCentral tank• Central pumping• Coupling of 2 girders• UHV tests not achieved• No damping material
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Decoupling of the two girders:
• Mini pumps on PETS and SAS
• Independent vacuum tank for MB
• Similar configuration tested in CLEX
New vacuum system proposal
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Mini pumps on PETS and SAS
Considerations:
• Number of pumps (2/PETS,SAS)
• Supports
• Heat transfer to PETS and SAS (pumps power?)
• Reducing flanges
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Mini pump on T1 PETS
Rotate PETS vacuum chamber by 90o:
• Possible, as PETS not yet fabricated
• No support needed
Considerations:
• Vertical position OK?
• Very tight clearance with PETS core, offset needed?
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MB Vacuum network T0.2Considerations:
• 2 pumps enough?
• Ports for external pumping, sensors
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MB Vacuum network T1Considerations:
• 2 pumps enough?
• Ports for external pumping, sensors
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Vacuum networkConsiderations:• Tubing dimensions• Forces on SAS• Bellows necessary?
• Total weight per waveguide:2kg per load1kg from tank assembly
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General comments• Pumps control:
• Power• DAQ• Interconnection with thermal/alignment measurements
• Pumps vibration• Isolation required?
• Next steps?
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