1. Controls and monitoring in MICE 1.Physics and systematics 2.Controls types 3.Controls list 4.Data record M. A. Cummings April 2004 CERN

2. MICE Physics (  out  in ) theory. (  out  in ) theory. = 0.895 = 0.895 SIMULATION REALITYMEASUREMENT Theory uncertainties Model and simulation choices Currently, systematics at ~ 50% Experimental uncertainties Design of detectors/cooling elements Currently, systematics at ~ 0.1-1.0% Correct geometries TRIUMF data Debugging/comparing simulations Beam shape and diagnostics Proper emittance population Tracking and particle ID Cooling channel operation (  out  in ) exp = 0.904 ± 0.001 (statistical) = 0.904 ± 0.001 (statistical) ? On the experimental side, now we must start thinking about the systematic uncertainties and how we determine them

3.   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

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. 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: ¤With RF, no beam ¤without RF, beam ¤without any ¤with both RF and beam. ¤With magnets no absorbers ¤With magnets one absorber ¤Magnets, with and without RF….  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

6.  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

7. MACC’s experimental controls channel list what info source how many channels who determines Beam diagnostics -Tilley/Drumm Beam particle detectorsGregoire Tracker/ particle ID -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

8. The magnetic measurement devices as from the proposal see pages 52, 53. Need to know the shape of the magnetic field: MG: 4 sets of 3 Hall probes for EACH coil : 1)The magnet system will be operated in a variety of currents and even polarities 2)The field maps may not simply be the linear superposition of those measured on each single magnet independently: 3)Forces are likely to squeeze the supports and move the coils in the cryostats. Magnetic Field Controls

9. Cooling Channel Readout  Cooling channel components (physics components) Absorber temperature and pressure Absorber length (optical occlusion method) Magnetic field measurements: Hall probes power supply (currents) RF: power, phase Temperatures of all component structures Alignment to global coordinate system  Controls ( state of the system included in data record) LH2, Magnet and RF Safety systems (subset of monitoring describing the “state” of the system) Temp/flow on Helium Cryogenic systems Ambient temperature

10. 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: Thanks Paul! = rough pump on/off = turbo pump on/off = valves open/closed (×2)

11. 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. Thanks Guislain!

12. How to proceed  MACC keeper of controls list for the event record  Responsibility for determining tolerances =>  (  out /  in ) should be within the various detector groups  Form the experimental group ¤Calibration runs ¤Staging ¤Run physics configurations ¤Run durations ¤Event record (including controls)