1. XFEL The European X-Ray Laser Project X-Ray Free-Electron Laser Review of LLRF system based on ATCA standard, Dec 3-4, 2007 Piezodriver and piezo control Work Package 1.4 P. Sekalski, M. Grecki, T. Pozniak, K. Przygoda Department of Microelectronics and Computer Science, Technical University of Lodz, Poland

2. Przemek Sekalski, Department of Microelectronics and Computer Science, Technical University of Lodz, Poland Review of LLRF system based on ATCA standard, Dec 3-4, 2007 XFEL The European X-Ray Laser Project X-Ray Free-Electron Laser 2 The agenda The main aim of the piezocontrol system General requirements and assumptions of piezocontrol system Overview of the piezocontrol system in regard of LLRF system Piezocontroller architecture Piezodriver scheme Piezo read-out architecture

3. Przemek Sekalski, Department of Microelectronics and Computer Science, Technical University of Lodz, Poland Review of LLRF system based on ATCA standard, Dec 3-4, 2007 XFEL The European X-Ray Laser Project X-Ray Free-Electron Laser 3 The main aim of piezocontrol system Drive the piezoelements assembled in fast tuners frames to minimize the Lorentz force and microphonics effects On-line frequency detuning calculation Microphonics measurement (i.e. diagnostics of cryogenic system)

4. Przemek Sekalski, Department of Microelectronics and Computer Science, Technical University of Lodz, Poland Review of LLRF system based on ATCA standard, Dec 3-4, 2007 XFEL The European X-Ray Laser Project X-Ray Free-Electron Laser 4 General requirements and assumptions of piezocontrol system Lorentz force detuning during flat-top Δ  flat top < 10 Hz for field up to 30 MV/m (compensation up to 600 Hz) Maximal repetition rate of RF pulse under 10 Hz (20 Hz optional) Standalone box for piezodriver, DAC and ADC boards (no-ATCA due to power consumption) 2 x EuroCrate 6U PiezoController compatible with ATCA carrier board Optical link between PiezoController and DACs and ADCs cards System suitable for 64 PI’s and/or NOLIAC’s piezoelements (4 modules x 8 cavities x 2 piezoelements each) 26 Piezocontrol systems (101 modules, 808 cavities, 1616 Piezos)

5. Przemek Sekalski, Department of Microelectronics and Computer Science, Technical University of Lodz, Poland Review of LLRF system based on ATCA standard, Dec 3-4, 2007 XFEL The European X-Ray Laser Project X-Ray Free-Electron Laser 5 Controller Low Level Application High Level Application Control System 8 8 8 Overview of the piezocontrol system Forward Reflected Probe

6. Przemek Sekalski, Department of Microelectronics and Computer Science, Technical University of Lodz, Poland Review of LLRF system based on ATCA standard, Dec 3-4, 2007 XFEL The European X-Ray Laser Project X-Ray Free-Electron Laser 6 Overview of the piezocontrol system Piezo Controller ATCA compatible 8 ch PZD amplifier 8 in 1 PZD amplifier ADC 32 in 1 8 8 8 8 8 8 88 Low Level Application Control System x4 DAC 32 in 1 DAC

7. Przemek Sekalski, Department of Microelectronics and Computer Science, Technical University of Lodz, Poland Review of LLRF system based on ATCA standard, Dec 3-4, 2007 XFEL The European X-Ray Laser Project X-Ray Free-Electron Laser 7 Requirements for PiezoController Hardware requirements: Lorentz Force: FSM, adder, multiplier, bram-blocks Microphonics: NLMS filter of order 32/64 (up to 64 multipliers) Adders 5x32 FPGA Spartan 3 xc3s2000 ATCA Carrier Board compatible (PCI Express) OptoLink to Controller (TLK 2501) OptoLink to DACs and ADCs cards (TLK 2501)

8. Przemek Sekalski, Department of Microelectronics and Computer Science, Technical University of Lodz, Poland Review of LLRF system based on ATCA standard, Dec 3-4, 2007 XFEL The European X-Ray Laser Project X-Ray Free-Electron Laser 8 Piezocontroller architecture – 2 FPGA for 8 cavities PZD Δt, f, A ref_table PZS ΔΔ 32 in 1 Control System DAC LLA FPGA Timing trig DAC PZD PZS Control System Piezo diagnostic Interlocks … 4x 8 in 1 32 in 1 ATCA ADC

9. Przemek Sekalski, Department of Microelectronics and Computer Science, Technical University of Lodz, Poland Review of LLRF system based on ATCA standard, Dec 3-4, 2007 XFEL The European X-Ray Laser Project X-Ray Free-Electron Laser 9 Piezocontroller - FPGA Sine generator Δt, f, A ref_table reference errors signal (microphonics) f(U Piezo_sens ) PID controller ΔΔ reference error signal (LFD) f(Δ  ) U piezo sens  LF/piezo ΔA trig x8 Piezo diagnostic Interlocks K1K1 K2K2 K3K3 U piezo act

10. Przemek Sekalski, Department of Microelectronics and Computer Science, Technical University of Lodz, Poland Review of LLRF system based on ATCA standard, Dec 3-4, 2007 XFEL The European X-Ray Laser Project X-Ray Free-Electron Laser 10 PiezoController architecture The feedback loop’s latencies < 0.5 ms The piezo-to-piezo feedback loop based on PID controller (vibration cancellation between the pulses) The detuning-to-piezo loop based on adaptive feed-forward (short RF pulse in comparison to mechanical action of cavity) OptoLink to DAC board and ADC board Piezo diagnostic (i.e. capacitance measurement) Interlocks (protection when module is warm)

11. Przemek Sekalski, Department of Microelectronics and Computer Science, Technical University of Lodz, Poland Review of LLRF system based on ATCA standard, Dec 3-4, 2007 XFEL The European X-Ray Laser Project X-Ray Free-Electron Laser 11 Low Level Application FPGA implementation of detuning algorithm for 8 cavities U for is a magnitude of forward signal,  for is a phase of forward signal, U probe is a magnitude of probe signal,  probe is a phase of probe signal,  1/2 cavity half-bandwidth Forward signal and reflected signal must be decoupled (signal callibration)

12. Przemek Sekalski, Department of Microelectronics and Computer Science, Technical University of Lodz, Poland Review of LLRF system based on ATCA standard, Dec 3-4, 2007 XFEL The European X-Ray Laser Project X-Ray Free-Electron Laser 12 Piezo Read-out Main objective: –read and adjust the impedance of piezoelements, which work as sensors in fast tuners General overview: –Standalone box (no ATCA, EuroCrate), –close to PZD for exchanging piezostack functionality –32 analog input channels (for 4 cryomodules), –32 channel ADC (sampling higher than 10 kHz/channel) –Opitcal Link to PiezoController for data exchange and board monitoring

13. Przemek Sekalski, Department of Microelectronics and Computer Science, Technical University of Lodz, Poland Review of LLRF system based on ATCA standard, Dec 3-4, 2007 XFEL The European X-Ray Laser Project X-Ray Free-Electron Laser 13 DAC board Optolink to PiezoController (Spartan support for TLK 2501) for data exchange and board monitoring DAC 32 channels (14 bits) Output voltage ± 1 V Mounted in EuroCrate 6U close to PZD

14. Przemek Sekalski, Department of Microelectronics and Computer Science, Technical University of Lodz, Poland Review of LLRF system based on ATCA standard, Dec 3-4, 2007 XFEL The European X-Ray Laser Project X-Ray Free-Electron Laser 14 Piezodriver main parameters Suitable for both types of piezostacks up to 5µF: Physik Instrumente (P-888.90 PIC255); C 2K  4,4 µF NOLIAC (SCMAS/S1/A/10/10/20 /200/42/6000); C 2K  2,4 µF Maximal supply voltage up to ± 150 V (nominal ±80V) Input voltage ± 1 V Amplifier gain G u = 100V/V, Operational temperature T c < 75°C (T j <125 °C) Pass-band frequency up to 5 kHz (for load 5uF) Need dedicated Power Supply Single channel PiezoDriver with Power Booster PB51 8 channels PZD on single board Up to 4 periods of sinus wave input signal 200 Hz, 10 Hz repetition rate,

15. Przemek Sekalski, Department of Microelectronics and Computer Science, Technical University of Lodz, Poland Review of LLRF system based on ATCA standard, Dec 3-4, 2007 XFEL The European X-Ray Laser Project X-Ray Free-Electron Laser 15 Piezodriver scheme Inputs Outputs Voltage sense output Current sense output 8x Piezo Drivers

16. Przemek Sekalski, Department of Microelectronics and Computer Science, Technical University of Lodz, Poland Review of LLRF system based on ATCA standard, Dec 3-4, 2007 XFEL The European X-Ray Laser Project X-Ray Free-Electron Laser 16 Piezodriver scheme Input Preamplifier OP177 Power Booster PB51 +15V -15V +Vss -Vss Output

17. Przemek Sekalski, Department of Microelectronics and Computer Science, Technical University of Lodz, Poland Review of LLRF system based on ATCA standard, Dec 3-4, 2007 XFEL The European X-Ray Laser Project X-Ray Free-Electron Laser 17 Thank you for your attention