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Determination of time zero from a charged particle detector

  • US 20080228418A1
  • Filed: 10/24/2007
  • Published: 09/18/2008
  • Est. Priority Date: 10/27/2006
  • Status: Active Grant
First Claim
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1. A method for reconstructing the trajectory of a charged particle passing through a charged particle detector having a plurality of drift cells, said method comprising:

  • (a) obtaining hit signals representing identifiers of drift cells hit by charged particles and corresponding hit times;

    (b) grouping in-time drift cell hits identified as being associated with a track of a particular charged particle passing through said detector;

    (c) initially estimating time zero for said particular charged particle;

    (d) determining drift radii based on estimates of time zero, drift time conversion data and the time of the hit;

    (e) fitting linear tracks to drift radii corresponding to a particular time-zero; and

    (f) searching and selecting a time-zero value associated with the best of the track fits performed for particular charged particle and computing error in time-zero and tracking parameters.

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