Actual Circuit Total inductance:15.4 H (154x0.1H) Total resistance:1 m  RB output current:13 kA RB output voltage:190 V Main Power Converter RB circuit

Actual Circuit Replacement of several LHC dipoles by 11T dipole magnets Assumptions: –The two 5.5 m magnets are connected in series (one trim power converter) –One internal by pass diode to protect the 5.5 m magnets

Total inductance:15.5 H (152x0.1H + 2x0.15H) Total resistance:1m  Output current:13 kA Output voltage:190 V Main Power Converter No additional power converter Auxiliary Power Converters Solution # 1 (+) No additional power converter No additional component in the circuits Protection of the magnets (-) Optic – Beam control (additional corrector?) Qsym detection V_earth_meas Same current in the magnets

Total inductance:15.5 H (152x0.1H + 2x0.15H) Total resistance:1m  RB output current:13 kA RB output voltage:190 V PC1 PC2 Main Power Converter Total inductance:0.15 H Total resistance:1m  Output current:13 kA Output voltage:18 V Solution # 2 (+) Independent circuits Protection of the magnets (-) New high current CLs (13 kA) New 13 kA power converters (RQ type) Machine integration Independent circuits Auxiliary Power Converters

Total inductance:15.2 H (152x0.1H + 2x0.15H ) Total resistance:1m  RB output current:13 kA RB output voltage:190 V PC1 PC2 Main Power Converter Total inductance:0.15 H Total resistance:1m  Output current:0 – 0.6 kA Output voltage:10 V Solution # 3.a C8C9C10C11C8 RB.A23 0.1H 0.15H (+) Size of the power converter (1 rack) Size of the current leads Direct on the cryostat Spare of the DFBA Protection of the CL Diodes to avoid reverse current (-) Floating trim power converters (2 kV?) Coupled circuits (control of the currents) Protection of the CLs (current circulation) Trim circuits with positive current Auxiliary Power Converters

Total inductance:15.2 H (152x0.1H + 2x0.15H ) Total resistance:1m  RB output current:13 kA RB output voltage:190 V Main Power Converter Total inductance:0.15 H Total resistance:1m  Output current:0 – 0.6 kA Output voltage:10 V Solution # 3.b (+) Size of the power converter (1 rack) Size of the current leads Direct on the cryostat Spare of the DFBA (-) Floating trim power converters (2 kV?) Coupled circuits (control of the currents) Protection of the CLs (current circulation) additional contactor Trim circuits with negative or bipolar current Auxiliary Power Converters