The CRB Project for Med Austron Kristian Ambrosch

The CRB Project for Med. Austron Kristian Ambrosch and Ivan De Cesaris 3 rd POCPA 23. 05. 2012 1 Ambrosch/De Cesaris WP/PO

Med. Austron - Overview The company EBG Med. Austron Gmb. H is building, and will later operate, the Med. Austron centre for ion-therapy and research in Wiener Neustadt in the County of Lower Austria. The centre comprises an accelerator facility based on a synchrotron for the delivery of protons and carbon ions to irradiation stations for cancer treatment and for clinical and non-clinical research. The centre is currently in the planning stage and is foreseen to start patient treatment in 2015. The total investment costs will be more than € 160 Million – financed and secured by the Federal State of Lower Austria, the Republic of Austria and the City of Wiener Neustadt. 3 rd POCPA 23. 05. 2012 2 Ambrosch/De Cesaris WP/PO

Med. Austron Overview 3 rd POCPA 23. 05. 2012 3 Ambrosch/De Cesaris WP/PO

Med. Austron Overview 3 rd POCPA 23. 05. 2012 4 Ambrosch/De Cesaris WP/PO

Med. Austron - Overview The Med. Austron Accelerator Facility • Synchrotron based • Protons and Carbon ions (other ions possible in the future) • Max. Energy: • Proton: 60 -250 Me. V (clinical) and < 800 Me. V (for research) • Carbon: 120 -400 Me. V/n The planning/realisation of the accelerator facility is being supplied in cooperation with the European Organisation for Nuclear Research (CERN). • • • Active beam scanning on all beam lines. Accelerator will be operated 24/7. Beam time split Treatment: Research ~50: 50 3 rd POCPA 23. 05. 2012 5 Ambrosch/De Cesaris WP/PO

Irradiation Rooms Room 1: · Horizontal beam line, protons/ions · Used by non-clinical research Room 2: · Horizontal and vertical line, protons/ions · Used for treatment and Medical Physics Room 3: · Horizontal beam line, protons/ions · Used for treatment Room 4: · Proton gantry · Used for treatment Room 5 (extension possible in phase II): · Optional ion gantry · Used for treatment 3 rd POCPA 23. 05. 2012 6 Ambrosch/De Cesaris WP/PO

Gantry: Example HIT 3 rd POCPA 23. 05. 2012 7 Ambrosch/De Cesaris WP/PO

Power aspect • Total power installed • Working Power LE ME MR EX T 2 V 2 Peak 9. 8 MW Peak 16. 7 MW Average 4. 3 MW Compensator Harmonics cosφ 3 rd POCPA 23. 05. 2012 8 Ambrosch/De Cesaris WP/PO

Topology choice • 50 Hz line commutated (thyristors) Passive filter • • Active filter Magnet Load Voltage swing between Ramp and Flat top => ratio 5/1 The power is controlled by adjusting the cosφ This lead to a very low power factor <0. 2 Then a network compensator is compulsory • Switched Mode dc AFE or • • dc Passive filter Magnet Load The power is controlled by the Pulse Width Modulation on the dc/dc Converter The cosφ is >. 95 and can be controlled to 1 if Active Front End is used From this aspect a network compensator is not needed The higher switching frequency improve output performance • No active filter needed 3 rd POCPA 23. 05. 2012 9 Ambrosch/De Cesaris WP/PO

Converter control • CERN FGC 3 and H bridge controller • PSI • DPC Digital Power electronic Control system National Instrument PXI crate to house: Real time Controller, FPGA for function generator 400 MHz FPGA with few 16 bit ADC for PWM Med. Austron considerations Up to 5 different converter contracts Could lead to over cost on every contract Med. Austron resource needed to master each system (no support available) Standard controller preferred Clear separation of responsibilities is compulsory H bridge control shall be the responsibility of the supplier Achievement of the very high precision Only very few companies have experience 3 rd POCPA 23. 05. 2012 10 Ambrosch/De Cesaris WP/PO

Items requested 275 magnet circuits to be powered with: 5 Families of power converters Qty A: DC commercial (of the shelf) for LE and ME quad solenoid, spectrometer 35 + 4 B: for Correctors, Quad 195+19 C: for Synchrotron quad and sextupole, switching dipole, 17 + 4 dispersion suppressor, injection and extraction septum D: 12 Scanning 10 + 2 E: Synchrotron and 90º dipole 2 C 3: Specificity for IH and Matching section Quads 16 + 2 3 Control electronic modules CRB: for all converters except family A MDI: for C 3 ECI: For Family E B train 3 rd POCPA 23. 05. 2012 11 Ambrosch/De Cesaris WP/PO

Specificity subfamily c 3 • Capacitor discharge topology • Using CERN design with adaptation transformer • 4 units in production by WP PO for ITS mid May • • Using CERN existing control electronics 12 units plus 2 spares to be produced in collaboration with CERN TE/EPC for October 2012. Profit of a new design and production for CERN linac 4 Saving of ~600 k€ from previous specification which included dc between 10 Hz pulses 3 rd POCPA 23. 05. 2012 12 Ambrosch/De Cesaris WP/PO

The CRB (Control Regulation Board) The full standardization of the current controller insures the very high precision requirement with a single identical product. This is granted by the CERN expertise in this domain. Complementary the design of the current controller can include auto calibration feature to be applied on demand by the machine operators. The converter parameters can be loaded from a centralized data base. This will insure proper data given to the converter in case of current controller exchange. From the operation aspects, the current cycle functions shall fully comply with the requested demand, The controller structure allow for very high tracking performances. A post mortem feature recording the important signals of the converter shall also be implemented. Field control shall also be achieved by the CRB 3 rd POCPA 23. 05. 2012 Ambrosch/De Cesaris WP/PO 13

Control Regulation Board Vision: One board to fit all Target: Minimize maintenance effort • One Regulation Board for Power Converters Families A – D • Reference Value • Control System • Beam Diagnostics System for the Scanning Magnet • Reference Types • Current • Field • Regulation Loop Frequencies • 2 k. Hz • 40 k. Hz (Scanning Magnets) • Pulsed (C 3) • ADC Precision • 10 – 100 ppm @ 2 k. Hz • 100 ppm @ 40 k. Hz 3 rd POCPA 23. 05. 2012 14 Ambrosch/De Cesaris WP/PO

CRB Overview 3 rd POCPA 23. 05. 2012 15 Ambrosch/De Cesaris WP/PO

CRB – FPGA Functionality • Handles the Input/Outputs • Functionality includes • Acquisition of ADC Measurements • Digital ADC Filter • USB Connection for Terminal Access • Forwards Slow Control for Fam. B, C, D • Digital Reference Output • Serial Link to Interface Boards • Temperature Regulation for ADC References • GPIOs • DAC • LEDs • With the exception to the Control System Interface, there are no I/Os directly connected to the DSP 3 rd POCPA 23. 05. 2012 16 Ambrosch/De Cesaris WP/PO

CRB – DSP Functionality • Communication with the Control System • Synchronous reception of reference values • Synchronous transmission of measurements • All parameters submitted by the Control System • Only calibration of the ADCs stored in Flash • Flashes FPGA • Communication with the local terminal • Full Functionality as for the Control System supported • Additional real-time signal tracing • • • Perform the regulation algorithm (RST) Data log Fault handling 3 rd POCPA 23. 05. 2012 17 Ambrosch/De Cesaris WP/PO

ADC Precision 3 rd POCPA 23. 05. 2012 18 Ambrosch/De Cesaris WP/PO

Conclusion • CRB suitable for all Power Converter Families • Separation of Functionality and IOs • CRB fully parameterizable by control system • Maintenance reduced to board exchange and startup Reduce MTTR to a minimum 3 rd POCPA 23. 05. 2012 19 Ambrosch/De Cesaris WP/PO