9 March 2005Edda Gschwendtner1 DAQ Terminology ISIS Terminology MICE Terminology Parameter Definitions

9 March 2005Edda Gschwendtner2 ISIS MS (Machine Start)  this is the pulse used for ISIS synchronisation –  2.5  s long, 50Hz (rising edge) at Δp=0 Cycle  20ms injection and acceleration cycle of the synchrotron Δp  200 kHz square wave pulse train  4000 pulses per cycle used to sequence synchrotron: - dp = dp= 3000  In order to avoid confusion we should use this jargon.

9 March 2005Edda Gschwendtner3 ISIS Timing - Primary Signals Permanent Timing Pulses  MS (Machine Start)  2.5μs pulse every 20ms at 0Δp  Δp (Δp train)  Square wave - 5μs period  These primary signals are phase locked to the magnet current/field waveform. dp = 1000 dp= 3000  All other ISIS signals are derived from these. Magnet current 20ms 0 Δp 1000 Δp 2000 Δp 3000 Δp 3999 Δp MSMS Accelerate Inject Extract ~3000 bunches

9 March 2005Edda Gschwendtner4 ISIS ↔ MICE Spill  the 1ms (nominal) duration of the measurement during which the RF is turned on, the target is inserted and a measurement is made. Spill-delay  the number of Δp pulses counted before the spill is triggered. MICE-veto  By monitoring the status of RF we can set a Veto. We then also can count the machine cycles (MS pulses) to select 1 in 50 or 1 in 100 etc. MICE-enable  The first MS after Veto is dropped, generates MICE-enable MICE-trigger  Start of RF

9 March 2005Edda Gschwendtner5 MS MICE-veto MICE-enable Spill-delay Δp Sequencer Enable Counter MICE-trigger Spill ISIS ↔ MICE ↔ Timing MS 20ms Cycle Spill Spill (1ms) MICE Trigger Spill-delay Δp=0 Δp:200kHz square wave MICE-veto  MICE-enable ←MICE-veto

9 March 2005Edda Gschwendtner6 MICE DAQ Events Spill Event Trigger (or Bunch Trigger or Particle Trigger) Particle Event (‘EVENT’) Special Event (Calibrations..)  Empty events (computing pedestal)  Triggers (Cosmics, sources)  pulsers (auto-induced by DAQ) Pulsing the electronics (e.g. gives gain-curve)  Laser, LED, muons… Spill (1ms) Spill Event Trigger or TOF(n) coincidence  Time reference to all the equipment

9 March 2005Edda Gschwendtner7 MICE Parameters Control/Monitoring (CM) Parameter  Not beam related  Not from analysis of detectors  Industrial standards Physics Parameters = Detector performance parameters  Beam related  From detector analysis e.g.: pedestal, gain,… e.g.: T, P, currents…