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

KEK TPC Test Beam June 22 nd - July 1 st , 2005. X Resolution Study. (Ar/iC4H10)(95/5). Magnetic Field: B = 0, 0.5 and 1T. Khalil Boudjemline Carleton University, Ottawa. KEK, Tsukuba, July 1 st , 2005. PAD RESPONSE FUNCTION. B = 0T. PRF for different drift distances. No beam.

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

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  1. 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

  2. PAD RESPONSE FUNCTION B = 0T PRF for different drift distances No beam Preliminary results 2

  3. PAD RESPONSE FUNCTION B = 0.5T PRF for different drift distances No beam Preliminary results 3

  4. PAD RESPONSE FUNCTION B = 1T PRF for different drift distances No beam Preliminary results 4

  5. 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 5

  6. B = 0T X Resolution vs Z B = 0T Fit Magboltz B = 0.5T Preliminary results B = 1T B = 1T 6

  7. 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 with:s0 obtained from the fit (2). Cd is known.Neff from (1). s0: resolution w/o diffusion.Cd: diffusion coefficient.Neff: number of electrons. 7

  8. 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 8

  9. 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 9

  10. ENERGY LOSS 20% 4 GeV/c p MIP 10

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