1 T. Mohite and H. Welker LINAC and Operation/ Electric Power Systems GSI Darmstadt Power Converters for the Magnets of Collector Ring in FAIR

1 Outline BINP/FAIR/GSI Workshop; ; T. Mohite and H. Welker 2 Proposed CR Power Converters from GSI ACU System, and DCCT Load Cables: Co-axial and Water-cooled

1 3 BINP/FAIR/GSI Workshop; ; T. Mohite and H. Welker Power Converters of CR Converter typeDesignNo. No. of Cab. Floor space per Cab. Rated Current Max. Current Rate Rise time Flattop time Flattop Voltage Max. Voltage (driving case) Max. Active Power Effective Apparent Power Total Deviation No. of Magnets in Series [m x m][A][A/s][ms] [V] [kW][kVA][10 -4 ] Dipole Magnets PC CR.D1 SCR/S M ,530000any abs +/- 0,05 24 Quadrupole Magnets PC Wide Quadrupole 1 PC CR.Q1SM_1223,2 x 0, any abs+/-0,52 Wide Quadrupole 2 PC CR.Q2SM_1663,2 x 0, any abs+/-0,54 Wide Quadrupole 3 PC CR.Q4SM_1113,2 x 0, any abs+/-0,51 Narrow Quadrupole 1 PC CR.Q3SM_1223,2 x 0, ,330000any abs+/-0,54 Narrow Quadrupole 2 PC CR.Q5SM_1223,2 x 0, ,330000any abs+/-0,52/1 Multipole Magnets PC Sextupole PC CR.C1SM_4660,8 x 0,8+/ ,330000any abs+/-104 Octupole PC CR.C2SM_4440,8 x 0,8+/-23 0,830000any ,4abs+/-104/2 Injection/Extraction Septum PC Injection Septum (IS) PC CR.S1P-SM113,2 x 0, abs+/-11 Extraction Septum (ES) PC CR.S2P-SM113,2 x 0, E abs+/-11 Steering Magnets Steerer hor. CR.C3SM_424120,8 x 0,8+/-15 30,6500any395111abs+/-11 Steerer vert.. CR.C4SM_412 0,8 x 0,8+/ any abs+/-11 Steerer hor./vert. CR.C5SM_412 0,8 x 0,8+/ any abs+/-11 TDR Data for Power Converter in CR

1 4 BINP/FAIR/GSI Workshop; ; T. Mohite and H. Welker a twelve pulse SCR with controlled freewheeling thyristor. This component handles the large power. an parallel active filter PE. This component takes care of the current ripple and current dynamics. a mechanical changeover switch to reverse the current polarity. 20kV The system consist of: SCR/SM Topology: for Dipole Power Converter The dipole magnets will be connected in series and powered from a common power converter. Because of the large power it is connected to the 20kV level.

1 5 BINP/FAIR/GSI Workshop; ; T. Mohite and H. Welker One quadrant (SM_1; chopper circuit) for quadrupole power converters Four quadrants (SM_4; full bridge) for corrector power converters SM (Switch Mode) Topologies 400 V

1 6 BINP/FAIR/GSI Workshop; ; T. Mohite and H. Welker Charging Unit : controls the voltage of the main storage capacitor C 1 (840V max) Active Filter: controls the current during flat top (cutting the sine wave at Imax) Reversing Switch: for polarity change of the power converter Fast-pulsed Power Converter for Extraction Septum Pulsed Switch Mode (P-SM)Topology

1 7 BINP/FAIR/GSI Workshop; ; T. Mohite and H. Welker I magnet U magnet 6500A 630V 460V 68V for I magnet and U magnet in fast pulsed converter P VMagnet ≈ T cycle = 1,5s T r ≈ 15msT reg +T FT ≈ 2.5ms Resistive Losses: Simulation Results

1 8 BINP/FAIR/GSI Workshop; ; T. Mohite and H. Welker Slow-pulsed Power Converter for Injection Septum Magnets pulse power has to be taken from the grid energy recovery 2 existing transformers of 670kVA each are available and can be reused (after upgrade of SIS100 prototype test facility in Dec. 2012) SCR/SM Topology

1 9 BINP/FAIR/GSI Workshop; ; T. Mohite and H. Welker A U Load max 68V I magnet U magnet Simulation Results for I magnet and U magnet in SR topology

1 Outline BINP/FAIR/GSI Workshop; ; T. Mohite and H. Welker 10 Proposed CR Power Converters from GSI ACU System, and DCCT Load Cables: Co-axial and Water-cooled

BINP/FAIR/GSI Workshop; ; T. Mohite and H. Welker 11 ACU and DCCT: From the standardization point of view, all the power converters in FAIR has to be equipped with: the Adaptive Control Unit, ACU, a digital control unit the Direct-Current Current Transformer, DCCT, a high precision load current measuring device German In-kind Contribution

1 12 BINP/FAIR/GSI Workshop; ; T. Mohite and H. Welker Main Components: Multi-Function Unit (MFU) InterLock & Control Module (ILC module) Analog to Digital Converter (ADC module) Adaptive Control Unit (ACU) ACU is an interface between power converter and FAIR Central Accelerator Control System.

1 13 BINP/FAIR/GSI Workshop; ; T. Mohite and H. Welker bit- ADC-Module (ADC) Multi-Function-Unit (MFU):19’’ basic unit Interlock & Control-Module (ILCM) Hardware of the ACU-System

1 14 BINP/FAIR/GSI Workshop; ; T. Mohite and H. Welker Specifically for a standard power converter at GSI Typical ACU Application

1 15 BINP/FAIR/GSI Workshop; ; T. Mohite and H. Welker DCCT Examples

1 16 BINP/FAIR/GSI Workshop; ; T. Mohite and H. Welker Included in the delivery is: 19’’ basic unit with: o backplane 1 and 2 o multifunction unit o power supplies 1 and 2 o ADC module (if necessary) o DCCT (with digital output) interlock & control module graphical user interface drivers and interface protocol documentation and interface description support for integration into the power converter Not included in the delivery is: The adaption to the topologies which are not supported by the ACU-System yet for all power converters in FAIR Delivery Details of ACU and DCCT

1 Outline BINP/FAIR/GSI Workshop; ; T. Mohite and H. Welker 17 Proposed CR Power Converters from GSI ACU System, and DCCT Load Cables: Co-axial and Water-cooled

1 18 BINP/FAIR/GSI Workshop; ; T. Mohite and H. Welker Load Cable and Connection : Co-axial ; 400 A, 3 kV C/s of Co-axial cable Copper bushing fixed over the outer conductors Copper connectors Example of a cable connection

1 19 BINP/FAIR/GSI Workshop; ; T. Mohite and H. Welker Load Cable and Connection : Water-cooled ; 3.5 kA, 3 kV C/s of water-cooled cable An example of water-cooled cable connection

1 20 BINP/FAIR/GSI Workshop; ; T. Mohite and H. Welker CR Power Converters CR Supply Area

1 Thanks for Your Attention! BINP/FAIR/GSI Workshop; ; T. Mohite and H. Welker 21