t585 analysis status 3
Post on 02-Jan-2016
33 Views
Preview:
DESCRIPTION
TRANSCRIPT
T585 analysis status 32006/2/2
HIDEYUKI SAKAMOTO
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
P.E as a function of waveguide
This shows that
The problem has also at station side .
From Aron’s check
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
2
2fiti
2
2fiti
i
2 )y(y)x(x
]/LRcos[zxx 0ifit 0
/(0.3B)p R T
/(0.3B)p L L
]/L[zRsin yy 0ifit 0 x0, y0
0
#4#3
#2
#1R
Checking of tool -- This is last talk• Input = hit position by GEANT
Vertical: residual (%)
Horizontal: fit parameters
Transverse momentum (pt)
Longitudinal momentum (pz)
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.
Broadness of fitted Pz
• This problem occurs when turning angle, becomes small– z L -1 = z 0.3 B Pz -1 – Small Small B or Large Pz
• In MICE– B=4T,Pz=200MeV/c L=17cm => (z=1m)=337d
eg <= NO Problem
• In T585– B=1T,Pz=400MeV/c..etc.. 1/8 times as MICE=42deg– For analysis, using TOF for Pz reconstruction
#1
#2
#3#4
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) [C10
H8]n
0.4
2m
m0.3
5m
m0.2
8
mm
0.63mm+25um
Sta
tion
Bod
yMylar
X W V
Filled withAdhesive
Difference for View material
There is no significant difference because input momentum is 3GeV/c pion, MIPS
L1A cut
L1A & residue
cut
Photo electron distribution –DATA—
Timing(L1A) Residual
cm
RUN#1255
STATION1
X-VIEW
!! NO CLUSTERING
DATA
Photo electron distribution – MC–
Distributed by POISSON and Gausian
Calibrated by eye (w/o fit)
MC
MCDATA
Station 1 X-VIEW (with Adhesive and Mylar)
!! NO CLUSTERING
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
top related