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WITCH Control System

WITCH Control System. Michaël Tandecki & The WITCH collaboration

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WITCH Control System

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  1. WITCHControl System Michaël Tandecki & The WITCH collaboration S. Van Gorp, E. Traykov , V. De Leebeeck, G. Soti, F. Wauters, N. Severijns (K.U.Leuven),M. Beck, P. Friedag, J. Mader, C. Weinheimer (Univ. Munster),F. Wenander, A. Herlert (ISOLDE-CERN) , F. Glück, V. Kozlov (FZK Karlsrühe),D. Zakoucky (NPI-Rez, Prague)

  2. Outline • WITCH: overview & status • Experimental requirements & hardware • CS implementation • To-do list • Conclusion & Outlook Michaël Tandecki – CS workshop – 19/02/2009

  3. Outline • WITCH: overview & status • Experimental requirements & hardware • CS implementation • To-do list • Conclusion & Outlook Michaël Tandecki – CS workshop – 19/02/2009

  4. Physics principle 1 b+ 0.8 0.6 b+ 0.4 0.2 ne ne 200 500 400 100 300 0 Recoil energy (eV) Hb = CV HV + CA HA + CS HS + CT HT + CP HP b-n correlation Scalar Vector V S e.g. Fermi +-decay Michaël Tandecki – CS workshop – 19/02/2009

  5. Penning traps B: radial confinement E: axial confinement Michaël Tandecki – CS workshop – 19/02/2009

  6. Retardation spectrometer Energy conversion Michaël Tandecki – CS workshop – 19/02/2009

  7. Location & overview ~7m WITCH: Weak Interaction Trap for Charged particles Michaël Tandecki – CS workshop – 19/02/2009

  8. Status of the experiment spectrometer potential (V) • First retardation spectrum (of 124In) obtained in Nov. 2006 • Run on 35Ar unveiled some new problems • Work was done to investigate these issues and perform the necessary upgrades • Nov 2009; second run on 35Ar which showed that all of the upgrades made were successful; low level ionization prevented us from measuring a clean retardation spectrum Michaël Tandecki – CS workshop – 19/02/2009

  9. Outline • WITCH: overview & status • Experimental requirements & hardware • CS implementation • To-do list • Conclusion & Outlook Michaël Tandecki – CS workshop – 19/02/2009

  10. Experimental cycle • Ejection trigger from REXTRAP • Beamgate is triggered for a TOF separation • PDT is triggered to pulse down the ions • Cooling cycle in the cooler trap • Transfer to decay trap • Ions are kept in the decay trap for the measurement • The DAQ system is allowed to count; retardation power supply and DAQ are synchronized (to have a correspondence between time and retardation voltage) • Ions are ejected downwards 0s ~ 100 ms ~ 1s ~ 5s Michaël Tandecki – CS workshop – 19/02/2009

  11. WITCH hardware • Vacuum • Pfeiffer TPG300 & TPG262 • ACT200 & ACT600 (for ATP400 & ATP900 Alcatel turbo pumps) • Electrode voltages • IKS custom-made (10 channels from -500 to 500V) • ISEG NHQ 234M (2 channels with higher precision – 4kV) • ISEG EHQ F020n (16 channels from 0 to -2kV) • ISEG CPx (separate modules that go to -10kV) Michaël Tandecki – CS workshop – 19/02/2009

  12. WITCH hardware • IKS vacuum interlock system • Traps • IKS Gate & delay generator (2 devices with each 20 channels) • IKS trap supply (32 channels, 4 steps between -15 & 15V) • IKS endcap supply (4 channels, switching between -20 & 450V) • Excitations (frequency generator) • Stanford Research Instruments DS345 • IKS RF switch Michaël Tandecki – CS workshop – 19/02/2009

  13. WITCH hardware: Gate & Delay Unit • Early replacement/back-up solution for the PPG100 card (and now permanent) • Advantages • flexible; experimental cycles (e.g. excitations) can be changed easily • Disadvantages • many cables needed • overview of the cycle can be lost Michaël Tandecki – CS workshop – 19/02/2009

  14. WITCH hardware • Spectrometer • IKS retardation voltage supply(in max. 40 steps from 0 to 500V) • Data-acquisition • WIENER (to read a CAMAC crate; QDC, TDC, scalar) • Ortec MCS-pci (counter with variable time bins) • Tektronix oscilloscope(s) • Keithley electrometer • Miscellaneous • Thermocouple read-out (Pico technology TC-08) • Cryostat resistors (for temperature indication) • Liquid levels • Magnets power supply • IKS cross-beam ion source power supply • Xantrax power supply (for 60kV ion source) Michaël Tandecki – CS workshop – 19/02/2009

  15. Outline • WITCH: overview & status • Experimental requirements & hardware • CS implementation • To-do list • Conclusion & Outlook Michaël Tandecki – CS workshop – 19/02/2009

  16. Situation (of programs) 2 years ago Separate controls for different devices, on different computers • HV control (with remote control via VI server) • Timing • Scan.GUI • Oscilloscope (Easy) operation of the system was only possible thanks to remote desktopping Michaël Tandecki – CS workshop – 19/02/2009

  17. Computer situation (physically) Computers Data-acquisition Pressure gauges Vacuum interlock power supplies VBL ‘Trap computer’ Trap electronics Remote control computer Power supplies for the HBL Michaël Tandecki – CS workshop – 19/02/2009

  18. Computer distribution/architecture WITCH internet Internet gateway+ GUIs WITCH DAQ Ortec & WIENER cards+ GUIs WITCH CS server DNS, DMS server, SQL server, slow monitoring (pressures, temperatures), data server CS data (object properties) DAQ data CS commands WITCH traps RS232 (USB): trap power supplies, timing unitGPIB: frequency generators, scope, electrometer WITCH slow controls RS232: pressure gauges, HV supplies CAN: HV supplies DEVICES CS device computers, slow controls Michaël Tandecki – CS workshop – 19/02/2009

  19. Interfaces: HV control Michaël Tandecki – CS workshop – 19/02/2009

  20. Interfaces: Trap Control (GADU) Michaël Tandecki – CS workshop – 19/02/2009

  21. Interfaces: Trap Control (electrodes) Under construction(but operational) Michaël Tandecki – CS workshop – 19/02/2009

  22. Interfaces: Scan.GUI Under construction(but operational) Michaël Tandecki – CS workshop – 19/02/2009

  23. Outline • WITCH: overview & status • Experimental requirements & hardware • CS implementation • To-do list • Conclusion & Outlook Michaël Tandecki – CS workshop – 19/02/2009

  24. To-do list • HV control • add the odd power supply (three electrodes remaining) • polish the instrument drivers • TrapControl; • Work on the interface for the trap electrodes • Implement an FPGA card? • Scan.GUI • Polish & finish it • Use data from CS when taking data (for logging purposes) • Start using the DSC engine • Tune the basics: CAN communication when restarting the system.. Michaël Tandecki – CS workshop – 19/02/2009

  25. Conclusion & Outlook • The most important thing for us: it is working • CS gives us more flexibility; every device can be easily accessed on every computer • Outlook • Finalizing some of the GUIs • Tune some drivers a bit more • I can tidy up (and make available) some CS classes (and drivers) if people need it. Michaël Tandecki – CS workshop – 19/02/2009

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