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T585 analysis status 3

T585 analysis status 3. Contents On small light yield problem checked by Aron’s information Tracking status Transverse and Longitudinal momentum distribution Comparison of DATA with MC Photo electron distribution Next to do. 2006/2/2 HIDEYUKI SAKAMOTO.

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T585 analysis status 3

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  1. T585 analysis status 3 • Contents • On small light yield problem checked by Aron’s information • Tracking status • Transverse and Longitudinal momentum distribution • Comparison of DATA with MC • Photo electron distribution • Next to do 2006/2/2 HIDEYUKI SAKAMOTO

  2. P.E as a function of waveguide From Aron’s check This shows that The problem has also at station side .

  3. #3 #4 #2 #1 R f0 x0, y0 Track reconstruction -- This is last talk • Based on Uniform B-Field and NO scattering • Chi2 to be minimized • Input: xi,yi, i=1,4 • Output: x0,y0,p0,R,L • Degree of freedom: 8-5=3

  4. Checking of tool -- This is last talk • Input = hit position by GEANT Vertical: residual (%) Horizontal: fit parameters Transverse momentum (pt) Longitudinal momentum (pz)

  5. MC v.s. reconstructed pt & pz-- This is last talk MC Reconst. • Why is Reconst. longitudinal momentum so broad? • Bug? • Effect of scattering? • NOW checking this.

  6. Broadness of fitted Pz #1 • This problem occurs when turning angle, Dq becomes small • Dq= Dz L -1 = Dz 0.3 B Pz -1 • Small Dq Small B or Large Pz • In MICE • B=4T,Pz=200MeV/c  L=17cm => Dq (Dz=1m)=337deg <= NO Problem • In T585 • B=1T,Pz=400MeV/c..etc..  1/8 times as MICE=42deg • For analysis, using TOF for Pz reconstruction #2 #3 #4 Dq

  7. Event display – MC – With Dx Fitted Dx=0 True Pz=416MeV/c Dq(Dz=95cm)=39 deg

  8. W V X 0.28 mm Station Body 0.42mm 0.35mm 0.63mm +25um Mylar Filled with Adhesive UpdatedSetup of fiber sheet for MC • Scifi. • Diameter=350um =>(#)core:350umx94% =>(#)clad:350umx6% • Pitch=420um • Distance=280um • Material=scinti. =>(#)core:scinti.(Polythylene) =>(#)clad:PMMA (#) from Kuraray catalogue • View • Distance=0.63mm • Material=Air => polyurethane adhesive(PSILRA1000) (temporary) • Mylar • Thickness=25um • Material=(Polyethylene terephthalate) [C10H8]n

  9. Difference for View material There is no significant difference because input momentum is 3GeV/c pion, MIPS

  10. Deposit energy 3GeV/c pion DE1+DE2 DE3 DE4+ DE5 DE3 DE4+ DE5 DE3 DE2 DE4+ DE5 DE1 DE1, DE2 DE3 DE4 DE5

  11. Photo electron distribution –DATA— Residual Timing(L1A) RUN#1255 STATION1 X-VIEW cm L1A cut !! NO CLUSTERING L1A & residue cut

  12. Photo electron distribution – MC– Station 1 X-VIEW (with Adhesive and Mylar) MC DATA Distributed by POISSON and Gausian Calibrated by eye (w/o fit) MC DATA !! NO CLUSTERING

  13. Next to do • Mapping • stopped for while.. +My Request (as said e-mail to Aron) “Checking scifi alignment with my modified list” , making after checking by beam DATA. • Tracking • Reconstruction using TOF for T585 analysis • Estimating errors of reconst. Momentums • ADC distribution • Including “clustering” • Adjusting : Eye => Fitting

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