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Analysis Meeting 27 Jan 09Beam Characterization with TOFs1 Beam Characterization with the TOFs Mark Rayner.

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Presentation on theme: "Analysis Meeting 27 Jan 09Beam Characterization with TOFs1 Beam Characterization with the TOFs Mark Rayner."— Presentation transcript:

1 Analysis Meeting 27 Jan 09Beam Characterization with TOFs1 Beam Characterization with the TOFs Mark Rayner

2 Analysis Meeting 27 Jan 09Beam Characterization with TOFs2 Saturday 13 th December Shift run #850 - 854855856 - 858860865 - 871 pionsprotonspositrons D2MeV/c431490130200various? TOF0MeV/c420417100150 currentQ191.8101.225.537.4various? AQ2168185.146.568.2 Q3102.811328.341.6 D1345.6390.489.7130 D2158.5171.143.663.5 Q4283.7299.972.6107.8 Q5380398.496.2143 Q6252.1262.16393.9 Q7263.4038.463.1 Q8398.8057.795.1 Q9340.9048.880.6

3 Analysis Meeting 27 Jan 09Beam Characterization with TOFs3 Pions from 13 th December

4 Analysis Meeting 27 Jan 09Beam Characterization with TOFs4 Positrons from 13 th December

5 Analysis Meeting 27 Jan 09Beam Characterization with TOFs5 Cable Length Calibration (0,1)

6 Analysis Meeting 27 Jan 09Beam Characterization with TOFs6 Cable Length Calibration (0,0)

7 Analysis Meeting 27 Jan 09Beam Characterization with TOFs7 Cable Length Calibration (1,0)

8 Analysis Meeting 27 Jan 09Beam Characterization with TOFs8 Cable Length Calibration (1,1)

9 Analysis Meeting 27 Jan 09Beam Characterization with TOFs9 TOF0—TOF1 Time of flight (ns) calibration…Mean=8m/30cm ns –  t various p,  >200,  =1  150ps resolution need timewalk correction (and more data!) e+ ‘420MeV/c  +’ Transverse momentum (MeV/c) p=30MeV/c mainly muons amplitude 15.2 sigma 157ps mainly pions amplitude 50.0 sigma 196ps

10 Analysis Meeting 27 Jan 09Beam Characterization with TOFs10 TOF & Momentum

11 Analysis Meeting 27 Jan 09Beam Characterization with TOFs11 Pion trace space fits before amplitude cuts TOF0 x (mm) TOF1 x (mm)TOF1 y (mm) TOF0 y (mm) TOF0 dx/dz TOF1 dx/dz TOF1 dy/dz TOF0 dy/dz

12 Analysis Meeting 27 Jan 09Beam Characterization with TOFs12 TOF0 x (mm) TOF1 x (mm)TOF1 y (mm) TOF0 y (mm) TOF0 dx/dz TOF1 dx/dz TOF1 dy/dz TOF0 dy/dz Muon trace space

13 Analysis Meeting 27 Jan 09Beam Characterization with TOFs13 Work in Progress ●Apply amplitude cut on calculation of , , ,  ●Repeat process for muons ●Attempt to narrow  and  time of flight peaks ■Try to use both TOF0 planes ■Add time-walk calibration ●Error analysis ●Monte Carlo to check decay kinematics ●Take into account emittance growth in the Cherenkov

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