Download presentation
Presentation is loading. Please wait.
1
Controls Review Want to record a full configuration of the experiment at every possible “event”, including controls data. Event trigger = accelerator clock (or something very close) Systematics handles: ¤Using the beam itself: calibration runs ¤Experiment staging and component combinatorics ¤Defining tolerances Areas: ¤Beam shape and content ¤Trackers and detectors ¤Cooling channel
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 Assumptions
3
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 EE 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
4
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
5
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 (static) Beam Line Vacuum (e.g. penning & pirani) Diffuser in place Vacuum state: = rough pump on/off = turbo pump on/off = valves open/closed (×2)
6
Particle ID – Cerenkov (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 for oxygen sensor - 1 analog channel for monitoring the humidity inside the vessel. - 1 analog channel for a temperature probe - 1 analog channel for the He pressure inside the Cherenkov vessel. - 2 switches (over and underpressure)
7
Controls for Cerenkov (2)
8
PID – TOF(2) To measure t.o.f. with s ~ 70 ps, it is necessary to monitor detector status, environmental conditions (e.g., temperatures for signal cables) HV setting (~ 80 channels) via CAEN SYS1527-SYS3527 mainframes Temperature probes (~3) Magnetic field probes (~3) Additional (laser interlock, other.. ) Less than 100 channels to be under cold control system
9
PID - Calorimeter Now ~ 240 pairs
Similar presentations
© 2024 SlidePlayer.com. Inc.
All rights reserved.