SPS sextupole and octupole programmed field is significantly different to MBIand MQ waveforms, and therefore to simulate and train using Transfer learning and fine-tuning we need new waveforms that look similar to the real cycles.

Fitting models to simulated hysteresis data

Magnet parameters

Power converter limitations Power converter limitations

SFTPRO waveforms

Sextupole

Octupole

LHCPILOT waveforms

Sextupole

Octupole

AWAKE1 waveforms

Sextupole

Octupole

LHCION waveforms

Sextupole

Octupole

SFTION waveforms

Sextupole

Octupole

Waveform summary

Sextupoles go normally +/-150 A, with limits at +/- 250 A in one direction, and 70 A in the other.

Octupoles go normally +/- 3 A, with limits at +/- 200 A in one direction, and 70 A in the other. However most cycles seem to stay at 0 A.

  • Simulate SPS sextupole and octupole-like waveforms [priority:: medium] [completion:: 2025-09-01]