1. BPM DAQ for KEK Linac EPICS IOC using WindowsXP-based Oscilloscope for BPM DAQ System in KEK e-/e+ Linac Masanori Satoh (KEK Linac) June 13-16, 2011 EPICS Collaboration Meeting in NSRRC 2015/9/10 M. Satoh/ KEK Linac Control 1

2. BPM DAQ for KEK Linac KEK e-/e+ Linac and Operation 2015/9/10 M. Satoh/ KEK Linac Control 2

3. BPM DAQ for KEK Linac Injector Linac: 8 GeV e-/3.5 GeV e+, 50 Hz, 0.1~10 nC KEKB : 8 GeV e-/1400 mA, 3.5 GeV e+/2000 mA PF: 2.5 GeV e-/450 mA PF-AR: 6.5 GeV e-/60 mA Lepton Accelerator Complex in KEK Tsukuba Site KEKB : Shutdown in June 2010 SuperKEKB : 7 GeV e-, 4 GeV e+ 2014 ~

4. BPM DAQ for KEK Linac 2015/9/10M. Satoh/ KEK Linac Control4 PF Beam current stability since Apr. 2009 - KEKB e-/e+: 1 mA (~ 0.05%) : e-: 12.5 Hz, e+: 25 Hz - PF: 0.05 mA (~ 0.01%) : 0.5 Hz Luminosity KEKB e+ KEKB e- Simultaneous Top-up for 3 rings

5. BPM DAQ for KEK Linac BPM and Old DAQ System 2015/9/10M. Satoh/ KEK Linac Control5

6. BPM DAQ for KEK Linac Linac BPM System 2015/9/10M. Satoh/ KEK Linac Control6 BPM x 100 for 600-m-long Linac –Stripline-type (four electrodes) –Position and Charge measurement –Orbit and Energy Feedback DAQ System –x 20 DAQ Stations (One DAQ station typically handle BPMx4) –Digital Oscilloscope and VME CPU

7. BPM DAQ for KEK Linac 2015/9/10M. Satoh/ KEK Linac Control7 –5 GSa/s, 8 bits, 2ch, 1 GHz BW, GPIB (low noise immunity) –DAQ rate: ~1 Hz –Oscilloscope (Tektronix TDS680B) –VME CPU (OS-9/ MC68060 50 MHz) Vx1 Vx2 Vy1Vy2

8. BPM DAQ for KEK Linac Analogue signal from BPM (KEKB e-) 2015/9/10M. Satoh/ KEK Linac Control8 7 ns

9. BPM DAQ for KEK Linac 2015/9/10M. Satoh/ KEK Linac Control9 Middle server layer HLA layer Orbit Display Panel (SAD/Tk) BPM DAQ layer Orbit and Energy FB

10. BPM DAQ for KEK Linac New System (WindowsXP-based Oscilloscope) 2015/9/10M. Satoh/ KEK Linac Control10

11. BPM DAQ for KEK Linac BPM DAQ Upgrade Difficulty of maintenance (Old oscilloscope/VME) Fast DAQ is strongly required (50 Hz) for simultaneous top-up operationFast DAQ is strongly required (50 Hz) for simultaneous top-up operation Hardware replacement in summer 2007 Software upgrade => EPICS IOC in summer 2008 2015/9/10M. Satoh/ KEK Linac Control11

12. BPM DAQ for KEK Linac 2015/9/10M. Satoh/ KEK Linac Control12 –WindowsXP-based Oscilloscope (Tektronix DPO7104) –10 GSa/s, 8 bits, 4ch, 1 GHz BW, Ethernet connection –DAQ rate: > 50 Hz –EPICS IOC running on Oscilloscope (R3.14.9) 10 nC (1 V/div) 0.1/1 nC (200 mV/div)

13. BPM DAQ for KEK Linac Oscilloscope performance 2015/9/10M. Satoh/ KEK Linac Control13

14. BPM DAQ for KEK Linac EPICS PV Name Example LIiBM:SP_A1_B8_1:XSNGL:KBE LIiBM:BPM name:Property:Beam mode Beam mode –KBE (KEKB e-) –KBP (KEKB e+) –PFE (PF e-) –ARE (PF-AR e-) –and more (Study mode for each beam) 2015/9/10M. Satoh/ KEK Linac Control14

15. BPM DAQ for KEK Linac Synchronization w/ Beam mode Beam mode KEKB e-KEKB e+PF e-PF-AR e-… LIiEV:sa32425262… 2015/9/10M. Satoh/ KEK Linac Control15 EPICS PV name @ Event generator It works well, so far When network traffic is increased, …?

16. BPM DAQ for KEK Linac 2015/9/10M. Satoh/ KEK Linac Control16 HLA layer BPM DAQ x 24 (Win.XP Scope. EPICS IOC) PF KEB e-KEB e+ Archiver NAS Blade server Middle server layer (Python)

17. BPM DAQ for KEK Linac Summary and Future Plan The new BPM DAQ system has been developed: –EPICS IOC (WindowsXP-based digital oscilloscope) –Old system (20) has been replaced by new one (24) –Successful in stable beam position measurement (50 Hz) –Similar system was adopted for BPM DAQ of KEKB-BT Towards to SuperKEKB injector upgrade: –Higher resolution (100  m -> 10  m?) –Several candidates are now under consideration Libera Briliance Single Pass? VME-based new one? 2015/9/10M. Satoh/ KEK Linac Control17

18. BPM DAQ for KEK Linac Thank you for your attention! 2015/9/10M. Satoh/ KEK Linac Control18