1. Magnet electrical and hydraulic (dis)connections for coating
J. Bauche, aC coating and impedance reduction meeting,

2. SPS main magnet powering and cooling principles
Main dipole and quadrupole magnets powered and water-cooled through hollow copper bus-bars
Cooling circuit valves at each half-sextant (no individual valves at each magnet)
Powering Principle
Cooling Principle

3. Cross-section of bus-bar system in the SPS tunnel

4. Bus-bar connection details
Busbar to Magnet Connection
Hollow Water Cooled Copper Bar (d: 26 mm)
RETURN
~11 bars
INLET
~18 bars
Quadrupole QF/QD Busbars
Hollow Water Cooled Copper Bar (2 x d: 40.5 mm)
Dipole Busbars
Hollow Water Cooled Copper Bar (2 x d: 49.5 mm)

5. Bus-bar brazing

6. Power and water disconnection / reconnection process (mains)
Consignation main power circuits  TE-MSC and EN-EL
Switching off demineralized circuit water pumps; closing half-sextant valves; purging half-sextant water  EN-CV
Cutting bus-bar jumpers with cutting clamp  TE-MSC
Re-brazing new bus-bar jumpers  TE-MSC
Refilling water circuits  EN-CV
Déconsignation main power circuits  TE-MSC and EN-EL
(Other operations not detailed…)

7. SPS SSS magnet powering and cooling principles
Main dipole and quadrupole magnets powered with “dry” cables” and water-cooled through flexible hoses
Individual valves for each water-cooled magnet

8. Power and water disconnection / reconnection process (SSS)
Consignation of power circuits  TE-MSC and TE-EPC
Closing cooling circuit valves at magnet  TE-MSC
Disconnection of electrical cable lugs and of cooling flexible hoses  TE-MSC
Re-connections and opening of water valves  TE-MSC
Re-commissioning of the circuit (polarity check)  TE-MSC (support from BE-OP)
Déconsignation of power circuits  TE-MSC and TE-EPC
(Other operations not detailed…)

9. Spare slides

10. Typical half-cell

11. Handling and transport of main magnets
 Use of the ‘Dumont’ machines:
- Trailers designed for the SPS tunnels, equipped with 2 handling manipulators,
- Hydraulic system, not automated
- For long distances, magnets are unloaded on standard trailers in the access galleries
Installation of main dipole in the SPS
Transport of dipole