Mapper Software -Update Jaewon Park University of Rochester Mapper software working group Meeting, Nov 29, 2007
2 Fit with Lorentzian Single Lorenzian is more saf e. Try to extract strip position fr om fit peak position. Misbehaving fit will affect pe ak position. Expect correlation between o ther fit parameter Longitudinal position index chi2 p2 p1 p0 Green, blue cures have symmetric data points
3 Scanned strip position Slope is roughly consta nt. Strip position
4 It has some odd points Over slope is different Physically very unlikely If adjacent strips are curvy, t hey will tend to be curvy par allelly. Longitudinal position index chi2 p2 p1 p0
5 Longitudinal position index Gaussian+Lorenzian fit ---- dashed curve Compare with Gaussian+L orenzian fit result. G+L fit sometimes fails. If it doesn’t fails, it gave b etter peak position. Odd points got better. Looks more parallel. G+L fit gave worse atten uation curve. Is it real? Green = strip11 Blue = strip12
6 Subrange fit Fit G+L with two midd le points excluded Single Lorenzian G+L G+L (subrange)
7 Compare singl e Lorenzian w ith G+L for tai l-fit. Single Lorenzi an G+L (subrange) Single Lorenzian (subrange)
8 Signle Lorenzian fit
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10 G+L fit
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