Log entry time 01:27:36 on March 26, 2011

Entry number 353235

I use run 3006. Replay with the difference of the window of the drift time. The t0 remain constant at the first estimate:first chamber at 570ns, second at 560ns.

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Within the same run the residual == [drift distance from constructed track] - [drift distance from initial hit conversion]

tell how close the calibration help.

the residual yeild the slightly improve as follow.

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With window (-900,900), Sigma =9.97132e-04 +/- 4.45087e-06 m

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With window (0,300), Sigma =8.61736e-04 +/- 5.80527e-06 m

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With window (0,200), Sigma = 8.52062e-04 +/- 6.44605e-06 m

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The t0 is in progress of recalibrating. It need a lot of run to gain this. with this residual value. The refine of t0 is needed.

Figure 1: (-900,900) window

Figure 2: (0,300) window

Figure 3: (0,200) window