Collimator motorization/controlSPS/TT40 tests and LHC

Fabrice Decorvet

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

Test SPS LSS5/TT40 equipments

Motorization* 5μm LEP(1MGy)

Resolver 5μm LEP(1MGy)

Linear potentiometer 100μm ≥50MGy

LVDT 20μm ≥50MGy

PT100 1/10°C

Accelerometer piezo (10Hz..7kHz)

Audio recorder start remotely

Wiring requirement

• Power dissociate from signal

• Appropriate shielding and grounding

• Grounding continuity

Wiring: SPS quick plug

• Constraint due to narrow section

• Additional source for connection error and non-conductor

• Ground discontinuity

Extended wires to patch panelPatch panel in basement

Wiring

50% control price, to save money:

• SPS test to define if NE48 cable can be used

Interface

Collimator Performance

• Mechanical Stop = reference

• Switch = safety

• Effective excursion = out of switch

Axe Initialization

1. Motor off = jaw auto retraction = lim- mechanical Stop = reference

2. Motor position reset

3. Read out position sensors (pot/LVDT)

4. Unable lim- switch

5. Motor movement out of lim- switch

6. Effective excursion: 0,5 to 35 mm

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