[SBS_sim] data analysis

[Vahe Mamyan]

Hello,

Please see the attached file for g20 tracking efficiency with Bogdan's
suggestions taken account.

Vahe


On Fri, May 6, 2011 at 1:25 PM, Bogdan Wojtsekhowski <bogdanw at jlab.org>wrote:

> Hello Vahe and Ole,
>
> I would like to suggest to analyze data as follow (probably
> it is close what you have done):
> 1) Use only strips which are geometrically inside the boundary of
> initial kinematical range (plus 1 strip of each side).
> 2) Search for the tracks within an initial kinematical range:
> +/- 9 cm; +/- 1 mm; +/- 15 mrad and +/- 0.35 mrad
> (at least three GEM chambers should have the cluster coordinates
> which are belong to a straight line within 0.5 mm)
> 3) Define a probability of the track reconstruction:
> - good event which has at least one reconstructed track.
> 4) Plot a histogram of the tracks number.
> 5) Define efficiency of reconstruction when at least one track is
> in the narrow range from the ideal track.
> Here the narrow range is x = +/- 10 mm; y = +/- 1 mm;
> \theta_p^{hor} = +/- 2.4 mrad; \theta_p^{ver} = +/- 1 mrad
> 5) probability of contamination when at least two tracks
> are within a narrow range.
>
>
> --
> Bogdan Wojtsekhowski
> TJNAF, 757-269-7191
>
>
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