Power Supplies at BESSY II

Types of power supplies installed at BESSY II and MLS 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

Helmholtz-Zentrum Berlin 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

BESSY II Storage Ring: Circumference 240 m Electron energy 1.7 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

The Metrology Light Source (MLS) of the PTB MLS Storage Ring: Circumference 48 m Electron energy 105-630 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

Types of power supplies installed at BESSY II and MLS 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

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

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

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 Digital controls Digital Status CAN-Bus Two analog readbacks 16 bit resolution. One Slow High precission ADC One 100 kHz ADC ADA 16 IO8 Interfaceboard Embedded Controller Trigger Setpoint 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

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

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

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 Digital controls Digital Status CAN-Bus Two analog readbacks 16 bit resolution. One Slow High precission ADC One 100 kHz ADC ADA 16 IO8 Interfaceboard Embedded Controller Trigger Setpoint 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 DCCT1-Regulation POCPA 2010 /K. Burkmann-Gehrlein, T.Schneegans

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

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

New power supplies for the fast (200 Hz) transversal orbit feedback Time schedule 2009 Installation und Inbetriebnahme der schnellen Datenübertragungen Aufbereitungen der schnellen Strahllagemessung 2010 Entwicklung des FOFB-Systems zur Einsatzreife, Einsatz des Pilotsystems im Betrieb Ausstehend: Bestellung der ersten Charge „schnelle Powersupplies“ 2011 Einbau der Powersupplies, sobald geliefert und Shutdownzeit vorhanden Inbetriebnahme und Ausbau der entsprechenden FOFB-Stufe Bestellung und Lieferung der fehlenden „schnelle Powersupplies“, Inbetriebnahme… 2012 Charakterisierung und Tuning 2013 R.Müller POCPA 2010 /K. Burkmann-Gehrlein, T.Schneegans

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

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

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

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

Erste Stufe der Realisierung des FOFB Power Supplies WME PA4008\11 Digital controls Digital Status CAN-Bus Two analog readbacks 16 bit resolution. One Slow High precission ADC One 100 kHz ADC ADA 16 IO8 Interfaceboard Embedded Controller Trigger Setpoint 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

Zweite Stufe der Realisierung des FOFB Power Supplies WME PA4008\11 ADA 16 IO8 Interfaceboard Analog Setpoint Resolution up to 19 Bit Two analog readbacks 16 bit resolution. One Slow High precission ADC One 100 kHz ADC Digital Status Digital controls Trigger Setpoint + DCCT2-Monitor DCCT1-Regulation Linear Power Stage Second Analog Setpoint +/-10V for +/-Imax CAN-Bus Embedded Controller Analog Modulation Input 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 DCCT2-Monitor

Mögliche weitere Stufe drei der Realisierung des FOFB Power Supplies WME PA4008\11 Analog Setpoint including Modulation Analog readbacks Slow and Fast Digital Status Digital controls Trigger Setpoint DCCT2-Monitor DCCT1-Regulation Linear Power Stage + Neue Interfacekarte. Bisher noch nicht geplant. Eventuell nur neuen Embedded Controler auf alter ADA 16 CAN-Bus Für Remote Control Schneller Netzwerkanschluss für das komplette Feedback 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

Mögliche weitere Stufe vier der Realisierung des FOFB Power Supplies WME PA4008\11 Digital controls Neue Interfacekarte. Bisher noch nicht geplant. Digital Status 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

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

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