CM19 Vassil Verguilov DAQ Status Progress DAQ Next steps Summary.
Paul drumm daq&c-ws august/september 2005 1 Cooling Channel.
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Transcript of Paul drumm daq&c-ws august/september 2005 1 Cooling Channel.
paul drumm daq&c-ws august/september 2005 2
Physics Parameters• Monitoring system can record many parameters,
but:• What are the critical parameters?• Is the following sufficient?
– Beam Line & Target• Almost irrelevant• Dipole one = momentum of pions• Dipole two = momentum setting of muon beam• Diffuser = energy loss = momentum into MICE
– Poor measurement & p measured by TOF and Tracker• Use Table of settings
– record table-ID when loaded– “All ok” should be a gate condition
– Magnets/Absorber• Table of settings as above
– RF – more dynamic information is needed• High Q system – what does this mean for V & ?• Tuning mechanism – no details yet – pulse to pulse
paul drumm daq&c-ws august/september 2005 3
Superconducting magnets• Current Setting
– Process control – turn on/off/adjust– Passive monitoring – status
• Power supply = lethargic parameters• Transducers = V&I
• Temperature monitoring• Magnetic field measurements
– 3d Hall probes – CANBus – PCI/USB/VME interfaces available
• Feedback system or…• Fault warnings
– Temperatures / operational features
• MLS Record Settings, Report Faults, “All ok” in gate
paul drumm daq&c-ws august/september 2005 4
Absorber (and Focus Coils)
• Absorber & Focus Coil Module– Mike Courthold’s talk on Hydrogen &
Absorber Systems• Process control• Passive monitoring
– Suit of instruments:» Temperature» Fluid Level» Thickness (tricky)
• Fault warnings– MLS Record Settings, Report Faults,
“All ok” in gate
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RF (& Coupling Coil)
• RF Cavity– Tuning– Cavity Power Level (Amplitude)– Cavity Phase
• RF Power– LL RF (~kW)– Driver RF (300kW)– Power RF (4MW)
MICE has separate tasks to develop cavity and power systemsbut they are closely linked in a closed loop
paul drumm daq&c-ws august/september 2005 6
RF Cavity & Power ControlsTuning mechanism
DSP
DSP
A
Event Bus
Eth
erne
t
Control System
Fwd/Rflct power
LINUX Box/EPICS
DS-Scope
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RF sequence of events
• Trigger: event determined by (G)MS (etc)– After some programmed delay– RF powered up– Power Controlled to a set point
• Hardware phase & amplitude measurement• Amplitude in “fast” closed loop• Phase in “slow” closed loop
– Cavity tuning depends on error signals
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RF Phase and Particle detection
201.25 MHz
5 ns
flat top
10V pulse16 bits:1bit~1in 104
trigger TOF 0 & 1 : 6m@c = ~20ns
TOF 2 : +10m@c = ~50ns
Proposal: • Each cavity generates a Zero crossing point (e.g. -ve slope): • TDC between TOF1 & next Z/C• resolution ~ 5ns/360=14ps/degreeCalibration:• Single cavity: find Emax & Emin
Possible 2 phase ambiguity but does it matter?