1. Controls for Particle ID/tracking in MICE 1.Physics and systematics 2.Controls types 3.Controls list 4.Needed for particle ID/tracking M. A. Cummings May 28 2004

2.   Stated Goal  out /  in of  10 –3  Assume there will be a standard (or agreed to) definition of 6-D cooling.  Assume that the tracker can give us precision particle position and momemtum that this won’t contribute significantly to the error.  Assume particle ID < 1% error  The main sources of systematic errors are in the COOLING CHANNEL and detector solenoids, which will need to be under control to a level such that up to 10 independent sources of systematics will be < 10 -3  Suggested goal to keep each source of error <3*10 -4 level if at all possible.  What are the beam diagnostics concerns in a single particle experiment? How is beam diffusion controlled? Backgrounds? Systematics: assumptions and questions

3. MICE Experiments and Systematics  Want to record a full configuration of the experiment at every possible “event”.  Event trigger = accelerator clock (or something very close)  Will be running with different configurations of the cooling channel components and the beam for calibration runs:  Need to understand the tolerances on detectors and cooling channel elements necessary for cooling measurement  Want to record controls data as part of each data event  “Slow controls” are not equivalent to “monitoring” signals

4.   Areas: 1.Beam shape and content 2.Trackers and detectors 3.Cooling channel  Systematic handles: 1.Using the beam itself: calibration runs 2.Experiment staging and component combinatorics 3.Defining tolerances 4.Determining controls/monitoring readout onto the event record  Controls: 1.Enviromental and backgrounds 2.Particle tracking and ID (determining samples and emittances) 3.Systematics on the cooling channel Systematics readout

5.  Start-up systematics chart Quantity MICE organs ToleranceMonitorBeam measurement (suggested)Responsible Channel count Beam ISIS beam target magnets Collimators Diffuser… TBD Alignment with expt? Settings Beam instrumentation (profile & halo monitors ?) others Measure beam averages and correlations, composition and emittance With/without diffuser Drumm/Tilley Beam detectors TOF Cherenkov TBD Volts, currents Occupancies, Dead channels others Measure TOF vs nominal beam momentum Calibrate in configuration with electrons in beam ? Palladino/ Bonesini Summers Emittance tracker <<10 -3 TBDCompare one tracker to the other with empty abs and no RF Bross/ Long PID 10 -3 TBD Palladino/ Bonesini Gregoire Tortora DE/dX Hydrogen absorber A few 10 -3 Temperature Pressure thickness Others Measure energy difference in configuration without RF and with full absorber(s) Zisman Wing Lau MACC Ishimoto EE RF systemA few 10 -3 Volts Phases Temps Measure energy of outgoing muons vs phase or with/without RF Zisman Derun Li optics positions of coils internal survey some mmISIS alignement system position monitors? transfer matrix: (pt, pL, phi, x0, y0) in (pt, pL, phi, x0, y0) out measure with no RF and empty absorbers each time one changes the magnetic set-up. Green /Black currentsfew 10 -4 amp-meter Zisman / Green mag field some 10 -4 ~ mag probes temp probes Zisman/Green / Linde

6. MACC’s experimental controls channel list what info source how many channels who determines Beam diagnostics ~ 40Tilley/Drumm Beam particle detectors ~20Gregoire Tracker/ particle IDYOUR INPUT HERE!Bross/Bonesini Magnetic Fields12*(5+1+6+1+5)Rey/Guyot/Green AlignmentA few – ISIS alignment system Black/Linde Cryo controls -Baynham RF (V, phase, temp)2*4*2 + 8D. Li Magnets (temps) currents 3*10 3*2 Green Absorbers (temps, level, pressure) 20 *3Cummings/Ishimoto

7. Beamline Static = not expected to change with time (but may drift) Dynamic = changing with time ISIS proton beam trigger (pulse) and intensity (voltage level) (dynamic) ISIS proton beam loss monitors - ×few - voltage level, 20 ms cycles (dynamic) Target position (static) Target drive amplitude (dynamic) Target drive trigger (pulse) Beam Diagnostics: yet to be determined -Glasgow are looking at scintillators - X,Y beam profiles (N channels - dynamic) Settings of magnets (V, I) × 12 elements (static) = 9 quads, 2 dipoles, 1 sc- solenoid Beam Line Vacuum (e.g. penning & pirani) Diffuser in place Vacuum state: = rough pump on/off = turbo pump on/off = valves open/closed (×2)

8. Particle ID – ex: Cherenkov (2) - 8 analog channels for monitoring the (positive) HV's. - 8 analog channels for monitoring the analog responses of PM's to light pulses. - 1 digital output channel for triggering the light pulser - 8 TDC outputs (probably not important? depends on the noise levels). - 1 analog channel for a temperature probe - 1 analog channel for the He pressure inside the Cherenkov vessel. - 1 analog channel for monitoring the humidity inside the vessel.

9. Needed for particle I.D./tracking  Anything that pertains to emittance definition and sample selection  Right now need a list while we can still accommodate changes to the experiment’s design  Subset of normal data record  Responsibility for determining tolerances =>  (  out /  in ) should be within the various detector groups  To be determined by the experimental group ¤Calibration runs ¤Staging ¤Run physics configurations ¤Run durations ¤Event record (including controls)