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Laser Normalisation for Fitting

Compare the effect of background subtraction and laser energy normalisation for fitting. Neither the accuracy or precision of the laser energy measurement is sufficient to improve the normalised signal (hypothesis).

Charge normalised

Fitted values are:

Reduced Chi2: 4.14615
sigma_ex: 124.874 +2.12956 -2.11568
sigma_ey: 1.43039 +0.0543083 -0.054307
dx0: 206.36 +3.6964 -3.70271
dy0: 760.95 +0.0366295 -0.0364225
offset: 0.747667 +0.0110486 -0.0110642
amplitude: 10.3483 +0.11383 -0.11319

Charge normalised background subtracted

Fitted values are:

Reduced Chi2: 4.14615
sigma_ex: 124.872 +2.13111 -2.11412
sigma_ey: 1.43038 +0.0543183 -0.0542969
dx0: 206.348 +3.70816 -3.69089
dy0: 760.95 +0.0365984 -0.0364532
offset: 0.104667 +0.0110485 -0.0110643
amplitude: 10.3483 +0.113837 -0.113182

Charge normalised background subtracted len

Fitted values are:

Reduced Chi2: 4.72921
sigma_ex: 124.17 +2.14108 -2.12945
sigma_ey: 1.44897 +0.0532012 -0.0531334
dx0: 205.404 +3.7663 -3.75842
dy0: 760.967 +0.0360184 -0.0359157
offset: 1.29471 +0.14225 -0.142511
amplitude: 133.062 +1.45495 -1.44628

Charge normalised background subtracted lpn

Fitted values are:

Reduced Chi2: 6.36996
sigma_ex: 110.207 +2.14836 -2.13408
sigma_ey: 1.51045 +0.0640568 -0.0637409
dx0: 202.432 +3.95782 -3.93806
dy0: 760.82 +0.0406612 -0.0406095
offset: 1.53377 +0.145307 -0.14555
amplitude: 134.91 +1.96614 -1.94926

-- LaurieNevay - 26 Sep 2013

Physics WebpagesRHUL WebpagesCampus Connect • Royal Holloway, University of London, Egham, Surrey TW20 0EX; Tel/Fax +44 (0)1784 434455/437520

Topic revision: r1 - 26 Sep 2013 - LaurieNevay

 
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