KEK TPC Test Beam June 22nd - July 1st, 2005

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KEK TPC Test BeamJune 22nd - July 1st, 2005
X Resolution Study
(Ar/iC4H10)(95/5)
Magnetic Field B 0, 0.5 and 1T
Khalil BoudjemlineCarleton University, Ottawa
KEK, Tsukuba, July 1st, 2005
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PAD RESPONSE FUNCTION
B 0T
PRF for different drift distances
No beam
Preliminary results
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PAD RESPONSE FUNCTION
B 0.5T
PRF for different drift distances
No beam
Preliminary results
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PAD RESPONSE FUNCTION
B 1T
PRF for different drift distances
No beam
Preliminary results
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X Residual Mean and X Residual Sigma vs PadRows
Mean
B 0T
B 0.5T
B 1T
Sigma
B 0T
B 0.5T
B 1T
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B 0T
X Resolution vs Z
B 0T
Fit
Magboltz
B 0.5T
Preliminary results
B 1T
B 1T
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X Resolution vs Z (How to fit?)
Diffusion only
Other
Diffusion
1- fix Neff from MC 2- fit sx f(z) with s0 and
Cd free 3- Plot Magboltz curve withs0 obtained
from the fit (2). Cd is known.Neff from (1).
s0 resolution w/o diffusion.Cd diffusion
coefficient.Neff number of electrons.
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Primary and secondary electrons and Neff
calculation
Statistics of primary ionization (Poisson)
n average k actual number
Cluster Size Distribution
Probability to obtain ne per interaction
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SIGNAL ON THE MESH
For 7.5 cm track
From Monte-Carlo 450e (MIPs)
55Fe 5.9 keV
4 GeV/c p- beam
(Landau)
Signal on the mesh 55Fe beam
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ENERGY LOSS
20
4 GeV/c p
MIP
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