Geantino scans used in eta steps 0.1 to plot radLenExtraMat.eps

Confirms that extra material described by (1% + 2% R/(781*tanTheta))/sinTheta, where R=radius SCT2=371mm

Fitting SCT1-4 negative phi with 1/sinSquaredTheta looks much improved - with positive constants.

  $N_i$ = $N_e$ ( $D_i$ /$sin^2 \theta$ +$C_i$) (1)

Ni = Number DNA hits

Ne = Number events/100000

Backwards Fit

factor value error
D1 260.580 12.4759
D2 111.323 8.90196
D3 50.6875 6.79194
D4 -29.8715 5.18615
C1 357.622 11.4314
C2 188.229 8.21227
C3 126.195 6.34909
C4 135.388 5.25716

Forwards Fit

D1 87.0629 5.59759
D2 258.431 9.91667
D3 270.497 10.9642
D4 65.1546 6.53527
C1 25.0689 4.84836
C2 118.687 8.69998
C3 180.460 9.76006
C4 93.8945 5.99256

-- SueCheatham - 12-Oct-2009

Attachments Attachments
Topic attachments
I Attachment History ActionSorted ascending Size Date Who Comment
Unknown file formateps FitBackSinSq.eps r1 manage 46.7 K 2009-10-13 - 15:15 SueCheatham Sin squared fit SCT1-4 negative phi.
Unknown file formateps FitBackTest99.eps r1 manage 17.6 K 2009-10-12 - 23:38 SueCheatham Difference in DNA hits for SCT 2 and 3 - Backwards fit
Unknown file formateps FitForSinSq.eps r1 manage 53.0 K 2009-10-13 - 15:14 SueCheatham Sin squared fit SCT1-4 negative phi.
Unknown file formateps FitForTest99.eps r1 manage 17.6 K 2009-10-12 - 23:39 SueCheatham Difference in DNA hits for SCT 2 and 3 - Forwards fit
Unknown file formateps radLenExtraMat.eps r2 r1 manage 9.7 K 2009-10-13 - 13:08 SueCheatham Geantino scans used to identify extra material in eta ranges.
Unknown file formateps radlenSCTEta040-050_CSC_01.eps r1 manage 9.8 K 2009-10-12 - 23:45 SueCheatham Geantino Scan: Eta Range 0.4-0.5
Unknown file formateps radlenSCTEta070-080_CSC_01.eps r1 manage 9.9 K 2009-10-12 - 23:44 SueCheatham Geantino Scan: Eta Range 0.7-0.8
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Topic revision: r3 - 2009-10-13 - SueCheatham
 
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