Transcript Slide 1
WITCH Control 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) Outline • • • • • WITCH: overview & status Experimental requirements & hardware CS implementation To-do list Conclusion & Outlook Michaël Tandecki – CS workshop – 19/02/2009 Outline • • • • • WITCH: overview & status Experimental requirements & hardware CS implementation To-do list Conclusion & Outlook Michaël Tandecki – CS workshop – 19/02/2009 Physics principle Hb = CV HV + CA HA + CS HS + CT HT + CP HP b-n correlation ' 2 S CS C v W ( ) 1 a cos( ) a 1 2 c CV 2 Scalar Vector b+ b+ 1 0.8 0.6 ne e.g. Fermi b+-decay V S 0.4 ne 0.2 0 100 200 300 400 500 Recoil energy (eV) Michaël Tandecki – CS workshop – 19/02/2009 Penning traps B: radial confinement E: axial confinement Michaël Tandecki – CS workshop – 19/02/2009 Retardation spectrometer Energy conversion Ekin1 B1 0.1T 1.1% kin E0 B0 9T Michaël Tandecki – CS workshop – 19/02/2009 Location & overview WITCH: Weak Interaction Trap for Charged particles ~7m Michaël Tandecki – CS workshop – 19/02/2009 • 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 spectrometer Status of the experiment Michaël Tandecki – CS workshop – 19/02/2009 Outline • • • • • WITCH: overview & status Experimental requirements & hardware CS implementation To-do list Conclusion & Outlook Michaël Tandecki – CS workshop – 19/02/2009 Experimental cycle 1. Ejection trigger from REXTRAP 2. Beamgate is triggered for a TOF separation 3. PDT is triggered to pulse down the ions 4. Cooling cycle in the cooler trap 5. Transfer to decay trap 6. Ions are kept in the decay trap for the measurement 7. The DAQ system is allowed to count; retardation power supply and DAQ are synchronized (to have a correspondence between time and retardation voltage) 8. Ions are ejected downwards 0s ~ 100 ms ~ 1s ~ 5s Michaël Tandecki – CS workshop – 19/02/2009 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 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 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 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 Outline • • • • • WITCH: overview & status Experimental requirements & hardware CS implementation To-do list Conclusion & Outlook Michaël Tandecki – CS workshop – 19/02/2009 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 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 Computer distribution/architecture WITCH internet WITCH DAQ Internet gateway + GUIs Ortec & WIENER cards + GUIs CS data (object properties) DAQ data CS commands WITCH CS server DNS, DMS server, SQL server, slow monitoring (pressures, temperatures), data server WITCH traps WITCH slow controls RS232 (USB): trap power supplies, timing unit GPIB: frequency generators, scope, electrometer RS232: pressure gauges, HV supplies DEVICES CAN: HV supplies CS device computers, slow controls Michaël Tandecki – CS workshop – 19/02/2009 Interfaces: HV control Michaël Tandecki – CS workshop – 19/02/2009 Interfaces: Trap Control (GADU) Michaël Tandecki – CS workshop – 19/02/2009 Interfaces: Trap Control (electrodes) Michaël Tandecki – CS workshop – 19/02/2009 Interfaces: Scan.GUI Michaël Tandecki – CS workshop – 19/02/2009 Outline • • • • • WITCH: overview & status Experimental requirements & hardware CS implementation To-do list Conclusion & Outlook Michaël Tandecki – CS workshop – 19/02/2009 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 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