The Normal Conducting Magnets and their Circuits

1. The Normal Conducting Magnets and their Circuits Suitbert Ramberger, AT-MEL-MI

2. The Normal Conducting Magnets and their Circuits • What will be their initial condition? • What is relevant to hardware commissioning from previous tests? • What shall be tested during hardware commissioning?

3. Normal Conducting Magnets and their Circuits • Normal Conducting LHC Magnets and Circuits • Magnet Tests at Manufacturers & CERN • Installation of NC Magnets • Objectives for Commissioning NC Magnets • Initial Conditions after Installation • Electrical Quality Assurance

4. Normal Conducting LHC Magnets • 12 MBXW (D1) • 1 PC in SR5 • 10+10 MQWA (Q4 and Q5) • 12 MBW (D3 and D4) • 3 PCs in SR3 • Water cooled cables! • 2x15 MSD • 2 PCs in SR6 • 4 MQWB • 8 MCBW • 12 PCs in UJ33 • 4 MQWB • 8 MCBW • 12 PCs in UJ76 • 2 MBXWT • 1 MBWMD • 3 PCs in SR2 • 10+10 MQWA (Q4, Q5) • 8 MBW (D3, D4) • 3 PCs in SR7 • 5 MSI (in series) • 6 MBIBH (in series) • 4 MQI • 1 MCIA • 7 PCs in SR2 • 2 MBXWS • 1 MBXWH • 3 PCs in SR8 • 5 MSI (in series) • 7 MBIAH (in series) • 4 MQI • 6 MCIA • 12 PCs in SR8 • 12 MBXW (D1) • 1 PC in SR1

5. Magnet Tests at Manufacturers & CERN Tests at Manufacturers • Leak Test (15min @ 30bar) • Flow Test (>nom @ 4bar) • Magnet Resistance • Ground Insulation (>100MΩ @ 2kV) • Thermo-Switch Test • TS Insulation (>100MΩ @ 500V) • Geom. Meas. (Sagittas, Twist) • Magnetic Measurement • BINP, IHEP Tests at CERN • Leak Test (15min @ 30bar) • Flow Test (>nom @ 4bar) • Magnet Resistance • Magnet Inductance • Ground Insulation (>100MΩ @ 2kV) • Thermo-Switch Resistance • Geom. Meas. (Target Setting) • Magnetic Measurement • MQW + samples MB..W..

6. Normal-Conducting Magnet Installation Normal-Conducting Magnet Installation • Magnet Transport in Tunnels (TS-IC) • Magnet Transfer on Supports (AT-MEL, TS-IC) • Connection of Water (TS-CV) • Balancing of Water Circuit (TS-CV) • Connection of Current and Interlock Cables, and Grounding (TS-EL) • Magnet Alignment (TS-SU) • Vacuum Chamber Connection (AT-VAC) • Vacuum Chamber Bake-Out (AT-VAC)

7. Hardware Commissioning of NC magnets Objectives of Hardware Commissioning Verify that ‘what you see is what you get’: • Magnet is properly connected to the right power supply • Magnet receives the right amount of current • Magnet polarity is correct Safety – ‘that you see if you don’t get’: • Magnet is protected (Interlock, WIC, Grounding) Collect data: • for other systems (e.g. circuit resistance for power converters) • for maintenance and repair (e.g. resistance to check for degradation)

8. Initial Conditions after Installation Conditions for the Electrical Quality-Assurance Initial Conditions: • Magnets tested in workshop • Current cables tested in-situ • Insulation • Water cooled cables in IR3 • Magnets connected to cables, water supply and water circuit balanced • Power cables not connected to the power converters Test Conditions: • Access to powering area limited and controlled (around magnets and PCs)

9. ELQA of the NC Magnet Circuits Electrical Quality Assurance Test (IST:WELQA) Tests of the whole circuit up to the power converter: • Logical cabling check • Resistance and inductance measurement • Ground Insulation (@ 1kV) State after the tests: • Circuit electrically qualified for powering • Note: for powering, interlock system must be ready and tested

10. The Normal Conducting Magnets and their Circuits • What will be their initial condition? • Individually tested (Powering, Cooling, Protection) • What is relevant to hardware commissioning from previous tests? • Circuits electrically tested without power supplies • What shall be tested during hardware commissioning? • Power Supplies • Interlock-System • Powering