Collimator motorizationcontrol SPSTT40 tests and LHC

1
Collimator motorization/controlSPS/TT40 tests
and LHC

• Fabrice Decorvet

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Requirements for installations in LHC tunnel

• 50 Mgy over 10 years
• 300 to 1500 m wiring line
• 5 µm position precision
• Low EMI noise
• High reliability
• Restricted human intervention time

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Test SPS LSS5/TT40 equipments

• Motorization 5µm LEP(1MGy)
• Resolver 5µm LEP(1MGy)
• Linear potentiometer 100µm 50MGy
• LVDT 20µm 50MGy
• PT100 1/10C
• Accelerometer piezo (10Hz..7kHz)
• Audio recorder start remotely

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Wiring requirement

• Power dissociate from signal
• Appropriate shielding and grounding
• Grounding continuity

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Wiring SPS quick plug

• Constraint due to narrow section
• Additional source for connection error and
  non-conductor
• Ground discontinuity
• Extended wires to patch panel
• Patch panel in basement

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Wiring

• 50 control price, to save money
• SPS test to define if NE48 cable can be used

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Interface
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Collimator Performance

• Mechanical Stop reference
• Switch safety
• Effective excursion out of switch

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Axe Initialization

• Motor off jaw auto retraction lim- mechanical
  Stop reference
• Motor position reset
• Read out position sensors (pot/LVDT)
• Unable lim- switch
• Motor movement out of lim- switch
• Effective excursion 0,5 to 35 mm

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Conclusion

• SPS test - using LEP motor and control
• Wiring and quick plug
• LVDT
• Remote control
• LHC
• Increase motor resistance
• Select wiring and quick plug
• Define control