HL-LHC BGI - Interlock / machine protection (magnet related)

Monday 3 Jun 2024, 15:00 → 16:00 Europe/Zurich

b.30 cafeteria (CERN)

Dominique Bodart (CERN), Gunn Khatri (CERN), James Storey (CERN), Jan Uythoven (CERN), Jeremie Bauche (CERN), Richard Mompo (CERN)

Draft:

Present:

Jan, Dominique, Richard, Jeremie, Gunn

 

Note:

• Jeremie and Dominique brings up the possible failure mode to attention. What if one of the magnet coils have shorts between turns ? The power converter will still provide the current but the magnetic field will be lower. As a result the circulating beam will have a net kick.
• Richard and Jan: How to implement it ? At Power converter level where the voltage will drop due to short circuit can be taken as the input to WIC.
• Jeremie: short will likely be between two layers rather than two adjascent turns given how normal conducting magnets are constructed. Given that, one layer short would reduce about 16% of the magnetic field in that coil. Dominique and Jan will look into the net kick of the beam for this field change.

15:00 → 15:45 What happens if there is short in the magnet coils ?

Open discussion to see a possible worst case scenario (and solution) where one of the magnet coils shows a short, which power converter will not detectect. As a result the beam might get a net kick (non zero integral B field).