UPS

Info

The main point is to concentrate to the stability of the frequencies of the UPS spectrum (spectrogram to prove/disprove the UPS frequencies are 50 Hz harmonics).

Resources and presentations

• 8 kHz Measurements on the LHC power converters, V. Barbet et al., 46^th LMC, 3^rd March 2010

• 8 kHz signals measured on UPS network powering RF equipments in SR4 and UX45, V. Chareyre, EDMS 1063974 (2010)

• Assessment of the High Frequency Noise Produced by the UPS Systems in the LHC Machine, V. Chareyre, EDMS 1539776 (2015)

• Mesures de Perturbations Conduites Generees par les UPS, D. Ribeyrol et al., EDMS 851713 (2007)

• Perturbations Terre-neutre sur les Reseaux 400V/F2 dans les Arcs du LHC, B. Dubois et al., EDMS 837687 (2007)

• Perturbations terre-neutre sur les Reseaux 400V/F2 dans les Arcs du LHC (½ secteur R3), S. Brown et al., EDMS 840359 (2007)

• Tests and analysis of a filter-based solution for attenuating 8 kHz signals generated by APC Silcon UPS, V. Chareyre, EDMS 1075078 (2010)

• 8 kHz perturbations, investigations and follow-up for the transverse damper system, D. Valuch et al.

• LHC Beam Stability and Performance of the Q/Q' Diagnostic Instrumentation, R. J. Steinhagen et al., Proceedings of BIW10, Santa Fe, New Mexico, USA, (2010)

• Electrical distribution for machine protection systems: how to ensure safe powering and high availability?, V. Chareyre, MPP Workshop (2013)

Data on the measurements on the BA7 UPS can be found in /eos/project/a/abpdata/lhc/rawdata/power_converter/UPS.

LMC presentations

• Measurement of the noise spectra of the LHC spare UPS, S. Kostoglou et al. (2020)

HL-TCC presentations

• 50 Hz harmonics' noise and their impact on LHC performance, S. Kostoglou et al. (2020)

HL-WP2 presentations

• Measurements of the LHC (spare) UPS voltage spectra, S. Kostoglou et al. (2020)