FP420 Connection Cryostat Mechanical Design

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FP420 Connection Cryostat Mechanical Design
Construction

• Key capabilities of CERN TS/MME

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CONTENT
Mechanical design constructionKey capabilities
of CERN TS/MME
2. CONSTRUCTION
1. DESIGN

• FP420 versus DFB ATM
• Pre-design Version 1
• Pre-design Version 2
• Mechanical analysis
• Pre-design Version 3
• Open issues

• Main processes involved
• Schedule and possible lead times
• Cost drivers
• DFB ATM assembly experience

3. CONCLUSION

• Advantages with CERN TS/MME
• Required framework conditions

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FP420 versus DFB ATM

• Continuity of the X and C lines
• Higher contraction of the busbar lines
• Fixed point to be relocated
• Longer interconnection bellow length
• Detector constraints (accessibility, precision)
• Radiation shielding

Distribution Feed Box
Arc Termination Module
FP420 Cryostat
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Pre-design Version 1

• Dipole cold foot to replace compensation system
• Couple two DFB ATM
• Allow contraction of the BB line

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Pre-design Version 2

• Redesigned supporting beam
• Double cold feet to free space for line X

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Version 2 Displacement analysis
VACUUM CONDITION
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Version 2 Displacement analysis
VACUUM CONDITION INTERCONNECTION at cold
(operation conditions)
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Version 2 Reaction analysis
Cold condition (vacuum, bellow force)
Bellow force - 10000 N
Reaction y 55000 N
Reaction z - 32500 N
Reaction z 70000 N
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Pre-design Version 3

• Two lowered supporting beams
• One single piece

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Version 3 Open issues next steps

• Detector supported by the cryostat need to deal
  with movements during cooling down and operation
• Need of additional central fixed point and
  supporting jack
• Use the transport buggies and the lifting beams
  of the DFBAs
• Pre-design v3 approval awaited

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Construction Processes involved

• Machining (both heavy and accurate)
• Sheet metal forming (vacuum tanks, piping)
• MIG/TIG welding
• Thermal treatments / Surface treatments
• Mechanical fitting (Beam screen integration)
• Metrology / Alignment
• Vacuum test / x-Ray inspection
• Thermal super-insulation
• Electrical insulation assembly and test

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Schedule projection attempt
Green light needed on time to allow the design
work to start
The production cannot start before the design is
fully approved
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Cost drivers What helps cutting them

• Re-use existent designed parts (cold feet, jacks,
  dished heads, etc)
• Experienced and multi-skilled workforce
• Avoid specific tooling
• Optimize the logistics between operations

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CERN TS/MME experience on DFB ATM

• Design and mechanical analysis
• Full production and assembly of 16 ATM
• Budget and time constraints sealed in a
  interdepartmental workpackage agreement

?Results Early deliveries and costs below
expectations after the 3 first units
Distribution Feed Box
Arc Termination Module
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Shuffling Box assembly
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Welding of the dished heads
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Cryostating of the Shuffling Module
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Thermal Super-insulation
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Final assembly
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DFBA (ATM HCM) Transport
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Conclusions

• Advantages with CERN/TS/MME
• Design and construction synergy benefits
• Shortened learning curve (skilled resources and
  appropriate equipment available)
• Highly responsive multi-technological environment
• Reduction of the logistics time and cost
• Design and construction traceability (CDD/ EDMS /
  MTF)
• Required framework conditions
• Obtain the formal approval of the pre-design
• Obtain the final version of the technical
  specification
• Adopt a workpackage oriented approach combining
  the mechanical design and the construction

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Thanks for their contribution

• Utilisation des ATM pour le projet FP420 - EDMS
  771549 Thierry Renaglia
• Use of the ATM for the FP420 Project EDMS 743628
  Thierry Colombet
• General information from the TS/MME ATM assembly
  team (Said Atieh, Laurent Préver-Loiri, Didier
  Lombard, and al.)

and thanks for your attention.