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Power Supplies at BESSY II

Power Supplies at BESSY II. Layout. Who is HZB?    Bessy II Storage Ring   The Metrology Light Source (MLS) of the PTB Types of power supplies installed at BESSY II and MLS Upgrade Programm for BESSY II Topping up Fast orbit feedback Future Project

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Power Supplies at BESSY II

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  1. Power Supplies at BESSY II

  2. Layout • Who is HZB? •    Bessy II Storage Ring •   The Metrology Light Source (MLS) of the PTB • Types of power supplies installed at BESSY II and MLS • Upgrade Programm for BESSY II • Topping up • Fast orbit feedback • Future Project • BERLin Pro Berlin Energy Recovery Linac Prototype POCPA 2010 /K. Burkmann-Gehrlein, T.Schneegans

  3. Who is HZB? Former HMI Former BESSY Since 1st of January 2009 Helmholtz-Zentrum Berlin Für Material und Energie • BER II • ISL • Photovoltaic • BESSY II • MLS • SC RF POCPA 2010 /K. Burkmann-Gehrlein, T.Schneegans

  4. Bessy II Storage Ring BESSY II Storage Ring: Circumference 240 m Electron energy1.7 GeV e- beam current up to 300 mA 32 Bending Magnets 144 Quadrupole Magnets 112 Sextupole Magnets 144 Corrector User operation since 1998 4 POCPA 2010 /K. Burkmann-Gehrlein, T.Schneegans

  5. The Metrology Light Source (MLS) of the PTB MLS Storage Ring: Circumference 48 m Electron energy105-630 MeV e- beam current 1 pA to 200 mA 8 Bending Magnets 24 Quadrupole Magnets 24 Sextupole Magnets 28 Corrector User operation since 2008 POCPA 2010 /K. Burkmann-Gehrlein, T.Schneegans

  6. Types of power supplies installed at BESSY II and MLS < 100W 130 devices made by: BESSY 100 W–1 kW 240 devices made by: BESSY Rohrer (GER) WME (GER) 1 kW–10 kW 50 devices made by: Delta (NL) Danfysik (DK) 10 kW–100 kW 60 devices made by: Danfysik (DK) Jäger (GER) > 100 kW 5 devices made by: Danfysik (DK) Jäger (GER) In The year 2004: 485 power supplies and 1 beamloss per month: MTBF = 40 years POCPA 2010 /K. Burkmann-Gehrlein, T.Schneegans

  7. Upgrade Programm for BESSY II: Topping Up • Today: 3 injections a day • Future (2013): Topping Up • In the Top-Up operation lost electrons are replaced continuously after minutes rather than every eight hours in order to keep a nearly constant beam current.  • A new 50 MeV Linac for Top Up and flexible fill pattern (Operation starts erly 2011) • Sextupole PS for 10 Hz dynamic cromaticity correction in the booster synchrotron (Operation starts end 2010) POCPA 2010 /K. Burkmann-Gehrlein, T.Schneegans

  8. Upgrade Programm for BESSY II: Fast orbit feedback Today: 0.2 Hz transversal global orbit feedback Overall there are 122 corrector magnets installed as auxilliary windings in the 112 sextupole magnets. 48 for horizontal plane 74 for vertical plane POCPA 2010 /K. Burkmann-Gehrlein, T.Schneegans

  9. Two analog readbacks 16 bit resolution. One Slow High precission ADC One 100 kHz ADC Digital controls Digital Status Trigger Setpoint Old Power supplies for the slow (0.2 Hz) transversal orbit feedback Old Corrector PS Power Supplies ROHREr Stability: ±100 ppm ripple +drift 3db bandwidth: <10 Hz CAN-Bus ADA 16 IO8 Interfaceboard Embedded Controller Mains Terminal Analog Setpoint Resolution up to 19 Bit Ext Interlock Terminal + Shunt resistor Magnet + Linear Power Stage Shunt resistor POCPA 2010 /K. Burkmann-Gehrlein, T.Schneegans

  10. Eliminate perturbation sources wherever possible • No Noise is better than Anti-Noise: R.Müller BPM Measurement Caused by switching of muliplexers on the Interfaceboard POCPA 2010 /K. Burkmann-Gehrlein, T.Schneegans

  11. Upgrade Programm for BESSY II: Fast orbit feedback • Future (2012): Fast Orbit Feedback 200 Hz • The concentration of almost 50 experimental stations in the experimental hall increases environmental noise, thereby adversely affecting the resolution and stability of measurement setups.  • Phase I • replacement of all corrector power supplies aims at higher correction speed (20Hz – 60Hz) • Phase II • replace today’s multiplexed analog beam position monitors (BPMs) by parallel processing fast digital units to increase correction precision: POCPA 2010 /K. Burkmann-Gehrlein, T.Schneegans

  12. Two analog readbacks 16 bit resolution. One Slow High precission ADC One 100 kHz ADC Digital controls Digital Status Trigger Setpoint DCCT1-Regulation New power supplies for the fast (200 Hz) transversal orbit feedback New Corrector PS Power Supplies WME PA4008\11 Stability: ±100 ppm ripple +drift 3db bandwidth: 1 kHz CAN-Bus ADA 16 IO8 Interfaceboard Embedded Controller Mains Terminal Analog Setpoint Resolution up to 19 Bit Analog Modulation Input Second Analog Setpoint +/-10V for +/-Imax Ext Interlock Terminal + DCCT1-Regulation DCCT2-Monitor Magnet + Linear Power Stage POCPA 2010 /K. Burkmann-Gehrlein, T.Schneegans

  13. New power supplies for the fast (200 Hz) transversal orbit feedback Transfer function for the complete system: power supply →magnet (auxilliary coils in BESSY II sextupoles ) →vacuum chamber →magnetic field at the place of the e-beam Conclusion: Up to several 100 Hz the correlation is rather linear POCPA 2010 /K. Burkmann-Gehrlein, T.Schneegans

  14. New power supplies for the fast (200 Hz) transversal orbit feedback Output current an voltage: Due to the limited output voltage of 40 V and the inductances of the different loads the output current of 8 A at DC-operation will be limited for AC operation as shown below POCPA 2010 /K. Burkmann-Gehrlein, T.Schneegans

  15. New power supplies for the fast (200 Hz) transversal orbit feedback Time schedule R.Müller POCPA 2010 /K. Burkmann-Gehrlein, T.Schneegans

  16. Future Project: BERLinPro Berlin Energy Recovery Linac Prototype What can be the succsessor for our 3rd generation lightsource BESSY II? ERLs hold the promise of becoming the future backbone of the SR sources, satisfying the needs of the current user community. BERLinPro is designed to develop and to demonstrate the CW LINAC technology and expertise required to drive next-generation light sources that are based on ERL principle 03/2011 first beam of srf photo electron source conceptual design report ready 2016 recirculation, energy recovery → start of accelerator physics experiments POCPA 2010 /K. Burkmann-Gehrlein, T.Schneegans

  17. Power Supplies at BESSY II • Thank you very much • for your attention. POCPA 2010 /K. Burkmann-Gehrlein, T.Schneegans

  18. New power supplies for the fast (200 Hz) transversal orbit feedback POCPA 2010 /K. Burkmann-Gehrlein, T.Schneegans

  19. New power supplies for the fast (200 Hz) transversal orbit feedback N. Hubert-SOLEIL 2009 DIPAC POCPA 2010 /K. Burkmann-Gehrlein, T.Schneegans

  20. Two analog readbacks 16 bit resolution. One Slow High precission ADC One 100 kHz ADC Digital controls Digital Status Trigger Setpoint Erste Stufe der Realisierung des FOFB Power Supplies WME PA4008\11 CAN-Bus ADA 16 IO8 Interfaceboard Embedded Controller Analog Setpoint Resolution up to 19 Bit + Ansteuerung nur über den vorhanden CAN-Bus Anschluss. Zu erwarten sind Bandbreiten > 10 Hz. Die obere Grenze ist durch die Ansteuerung gegeben und erst im realen Test zu bestimmen Die zur Zeit global eingebauten alten Netzgeräte sind nur unterhalb 10 Hz, und das auch erst nach Umbau aller Geräte, einsetzbar DCCT1-Regulation DCCT2-Monitor + Linear Power Stage INom= ± 8 A UNom= ± 40 V

  21. Power Supplies WME PA4008\11 Analog Setpoint Resolution up to 19 Bit CAN-Bus Two analog readbacks 16 bit resolution. One Slow High precission ADC One 100 kHz ADC ADA 16 IO8 Interfaceboard Embedded Controller Digital controls Digital Status Analog Modulation Input Second Analog Setpoint +/-10V for +/-Imax + DCCT1-Regulation DCCT2-Monitor + Linear Power Stage Trigger Setpoint DCCT1-Regulation DCCT2-Monitor Zweite Stufe der Realisierung des FOFB Ansteuerung (z.B. auch für ein langsames Feedback <1 Hz) über den vorhanden CAN-Bus Anschluss. Zusätzlich Sollwertvorgabe über den Modulationseingang der Netzgeräte aus dem unabhängig aufgebauten schnellen Feedbacksystem stammend. INom= ± 8 A UNom= ± 40 V

  22. Power Supplies WME PA4008\11 CAN-Bus Für Remote Control Neue Interfacekarte. Bisher noch nicht geplant. Eventuell nur neuen Embedded Controler auf alter ADA 16 Digital controls Digital Status Analog readbacks Slow and Fast Schneller Netzwerkanschluss für das komplette Feedback Trigger Setpoint Analog Setpoint including Modulation DCCT1-Regulation DCCT2-Monitor + Linear Power Stage Mögliche weitere Stufe drei der Realisierung des FOFB Ansteuerung über den vorhanden CAN-Bus Anschluss. Nur noch Remote Control und eventuell konstante Setzwerte werden hierüber zugestellt. Die Werte aus dem unabhängig aufgebauten schnellen Feedbacksystem werden digital über einen schnellen neuen Netzwerkanschluss zugestellt. INom= ± 8 A UNom= ± 40 V

  23. Mögliche weitere Stufe vier der Realisierung des FOFB Power Supplies WME PA4008\11 Digital controls Digital Status Neue Interfacekarte. Bisher noch nicht geplant. Analog readbacks Slow and Fast Schneller Netzwerkanschluss für das komplette Feedback Trigger Setpoint Analog Setpoint including Modulation Remote Control über einen schnellen neuen Netzwerkanschluss. Auch die Werte aus dem schnellen Feedbacksystem werden digital über einen schnellen neuen Netzwerkanschluss zugestellt. DCCT1-Regulation DCCT2-Monitor + Linear Power Stage INom= ± 8 A UNom= ± 40 V

  24. Dietmar Simmering POCPA 2010 /K. Burkmann-Gehrlein, T.Schneegans

  25. Dietmar Simmering POCPA 2010 /K. Burkmann-Gehrlein, T.Schneegans

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