LIU-ABT systems: PSB BI.DIS controls prepared by R.A.Barlow (September 2014) 1 CERN TE-ABT-EC

OUTLINE 2 Controls Project status Missing elements Issues Spending - FTE

BI.DIS Background info 3 In order to distribute the 160 MeV beam from Linac4 to the four rings of the PSB, new distributor magnets (BI.DIS) and magnetic septa (BI.SMV) need to be built. The proposed distribution scheme also requires the construction of new pulse generators (PFN) to double the magnitude of the BI.DIS field pulse and increase the duration of the pulse from 136 µs to a maximum of 620 µs.

BI.DIS Current development for a new pulse generator 4 Five magnets powered separately, each are terminated into a S/C. Five power converters needed + one spare. PFN discharge based power converter using IGBTs as a main switch. Partial energy recuperation after pulsing. The PFN stays charged all the time (this allows the system to contribute towards economy of energy).

BI.DIS Power supply 5 Output Voltage Charging Current Average Power Peak Power Converter Type Quantity 10 kV1 A1 A5 kJ/s10 kWAC/DC8

6 Controls functional requirements – SLOW control SLOW controlDescriptionDeliverablesIssues Power supplyControl of primary power supplies 1 PLC chassis unit (x6)n.a Electrical distributionControl of electrical distribution network, independent generator operation 1 unit with low voltage devices and PLC control Design in-house or outsourced to exterior AUE, FlashersSafety aspect for HVSafety componentsn.a Earthing switchPFN HV safety1 PLC chassis unit to control all earth switches n.a General purposeThis can be positional micro switches, temperature measurement, voltage references, contacts commands, etc… 1 PLC chassisNo clear definition of all peripherals. BIS system Provide the Linac4 BIS with BI.DIS system status 1 PLC chassisn.a SCADA State Machine Control1 Operator panel + Remote viewing Integration of PLC systems and Pxi. BI.DIS

Controls functional requirements – FAST control 7 FAST controlDescriptionDeliverablesIssues IGBT triggeropto coupled IGBT triggering system + synchronisation 1 crate unit with trigger chain (x6) + 1 N.I Pxi system for drift and synchronisation Complex system for IGBT switching characteristics control Timing distributionTiming distribution hardware, fault protection 1 H/W crate + FEC to manage timing distribution via Generic KiT’s system Complex timing issues, to be refined and discussed further with experts. Voltage pickupsFast analogue acquisition of voltage across PFN, Switches N.I Pxi systemn.a Current monitorsMagnet current and PFN current, fast analogue acquisition N.I Pxi system n.a Signal analysisAnalogue acquisition system and others … 1 H/W for signal acquisition, 1 for virtual scope, + 1 Scope Still to be defined, budget burden Faulty shots detectionFast faulty shot detection and missing shots in IGBT triggering N.I Pxi systemNot clear if integrated with drift and synchronisation system or separate project

8 8 Slow Control Ethernet Industrial bus Power supply Electrical Distribution General purpose Applications Equipment Server Timing Logging/ Signal acq AlarmSCADA Local Control Windows LabRT Trigger, Fast interlocks BIS BI.DIS Controls structure

BI.DIS Project status 9

BI.DIS ISSUES 10 Fast switching elements – Current prototype Due to their series configuration in BI.DIS, IGBT switch-off process leading to voltage imbalance. In order to obtain a good switch-off window for re-conduction the switch-off trigger pulse of each switch must be delayed with respect to each other in the ‘ns’ range. Hence specialised controls will be necessary for switch re- conduction Studies of IGBT switches have involved so far: ABB (improved T r ) Hitachi (improved T r ) Mitsubishi Infineon

BI.DIS ISSUES Fast switching controls 11 IGBT driver Concept 1SD210F2 (2of) Isolation transformer Concept ISO (2of) Timing Card Opto converter, DG535 PS-KM-E/S-Y/2A Timing Card fine delay (Stanford pulse generator presently used on test bench in hall 867) NI5152 digitizer

BI.DIS ISSUES Interlock logic 12 MAGNET Missing current detection Poor vacuum detection Pulse length not correct Short circuit between IGBT and magnet input IGBT Voltage balance on each switch Status not ok read back from each Concept driver card Faulty shot No output current from assembly Primary 15 V supply failure for each Over-temperature of the assembly FREEWHEEL DIODE/DUMP DIODE No current detection PFN Over-volt Under-volt Ross relay wrong status read back Doors micro-switches Manual grounding switch wrong position Wrong voltage versus CCV Fire detection PFN POWER SUPPLY faults (from Power Supply status) Overload No end of charge TIMING Delay charge – discharge too small Delay discharge – charge too small Double pulse PFN PPM SWITCH Not operating Short-circuit Erratics/Missings ?

BI.DIS ISSUES Timing distribution 13 Figure 3: Possible linac4 pulse structures and BI.DIS timing showing: (A) standard operation with injected turns per ring, (B) operation with 0 injected turns for ring 3 and (C) pilot beam with 3-5 injected turns per ring. KiTS Kicker CCC EXPERT Timing Slow control EXPERT Slow control The KiTS based on a modular hardware and software architecture has been developed with the objective to increase the homogeneity of fast and slow timing control for fast pulsed magnet systems. The KiTS uses a hardware abstraction layer and a configurable software model implemented within the Front-End Software Architecture (FESA) framework. It has been successfully deployed in the control systems of the LHC and SPS injection kickers, the SPS extraction kickers and the SPS tune measurement kickers.

BI.DIS Controls Hardware Rack Layout proposal 14 HARDWARE BREAKDOWN 1 x PDC 1 X OP 1 or more oscilloscopes 10 x PLC based Chassis 10 x PPU (at least) 1 x KIT’s system 1 x IPOC system ? 6 x Status/Command crate ? 1 x Pxi (however more likely 6 of) 6 x Power supply 6 x trigger card systems 1 x EDS controller

BI.DIS Manpower 15 Project Coordinator PLC HW + Software + Power supplies PDC design and integration Cabling Signal acquisitions / analysis systems Pxi system, drift stabilization, switch synchro, faulty shots IGBT drivers and triggering systems Timing system, KiT’s MANPOWER BREAKDOWN A possible team of 6 specialists

BI.DIS Specifications 16

BI.DIS Cost projection 17 SubjectTechnologyCostComment IGBT drivers carte concept10000 IGBT drift stabilizationPxi, National instrument90000 Power suppliesunknown Earthing switchSiemens PLC + in-house design20000 PPM switchBehlke technology10000 BIS systemSiemens PLC2000 SCADAOP370 Siemens5000 System timingKITS20000 Sig loggingOASIS, IPOC, MUX systems, SCOPE, etc Power distribution ControllerSiemens PLC + Legrand and others8000 Slow control (PLC Siemens)Master controller, PSC controller, General purpose25000 AUE/Flashers 2000 EN/ELDIC15000 FsuChassis build + installation50000 TOTAL CHF

BI.DIS Spending Profile 18 Year PV EV 21 AC 10 New PV Metrics per year in kCHF DescriptionProvide controls for kickers magnets and generators APT wu92161 Wu responsible Budget code65737