1. Mark Rayner – Analysis SessionCM25, 4 November 20091 The TOF detectors: Beyond particle identification Mark Rayner The University of Oxford MICE CM25

2. Mark Rayner – Detector SessionCM25, 5 November 20092 TOFs make important physics measurements beyond PID TRP Q7Q8Q9Diffuser x, y, z p x, p y, p z I7I7 I8I8 I9I9 IDID D2 RFAbsorber t 1 x 1, y 1 t ? t ? ? Stages II - VI  x,  y , , ,  t 0 x 0, y 0 note suppressed zero True Pt (MeV/c) 20 100 Pz Resolution (MeV/c) 7 0

3. Mark Rayner – Detector SessionCM25, 5 November 20093 Momentum measurement by the TOFs ‏Muon energy approximately constant between TOFs  p/E = s/t  s = path length between TOF0 and TOF1 (~8m)  t = time of flight (~29ns at 250 MeV/c) ‏Predicted resolution  4.7 MeV/c at 250 MeV/c ‏Bias on the measurement  Time of flight mis-calibration by 10 ps: 0.57 MeV/c bias  Path length over/underestimation by 10 mm: 2.1 MeV/c bias ‏Positron calibration is necessary x (mm) y (mm) s - L (mm) p y (MeV/c) p x (MeV/c)

4. Mark Rayner – Detector SessionCM25, 5 November 20094 Full P z reconstruction at  n = 6 mm P abs = 200 MeV/c z g0g0

5. Mark Rayner – Detector SessionCM25, 5 November 20095 Phase space reconstruction Truth Reconstruction x (mm) px/pz (mm) x-x’ space y-y’ space

6. Mark Rayner – Detector SessionCM25, 5 November 20096 Conclusion ‏Stage I  Difficult to predict emittance  Scraping: difficult to design optics  Emittance-momentum matrix? ‏Stages II – VI  RF phase of individual muons?  Longitudinal emittance?  Longitudinal-transverse coupling?  Amplitude-Pz correlation? ‏TOF capabilities  Individually calculated and independent measurements of all phase space variables  Essential for timing  Important momentum measurement upstream of thick diffuser plates, particularly at low amplitudes ADC Digits TDC Slab hits Space points Tracks Calibration, Complete detector measurements PID, Phase space distributions at all z