Difference between revisions of "Elong-13-04-29"
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| − | | style="width: 200px;" | <''x''> || style="width: 200px;" | | + | | style="width: 200px;" | <''x''> || style="width: 200px;" | ''dA<sub>zz</sub>'' with SHMS || style="width: 200px;" | ''dA<sub>zz</sub>'' with HMS || style="width: 200px;" | ''db''<sub>1</sub> with SHMS || style="width: 200px;" | ''db''<sub>1</sub> with HMS |
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| − | | 0.1 || ??? || ??? | + | | 0.1 || ??? || ??? || ??? || ??? |
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| − | | 0.3 || ??? || ??? | + | | 0.3 || ??? || ??? || ??? || ??? |
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| − | | 0.5 || ??? || ??? | + | | 0.5 || ??? || ??? || ??? || ??? |
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| − | | 0.75 || ??? || ??? | + | | 0.75 || ??? || ??? || ??? || ??? |
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| − | | 1.0 || ??? || ??? | + | | 1.0 || ??? || ??? || ??? || ??? |
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Revision as of 13:11, 26 April 2013
Rates Update
→ For the plots below, I assume the following:
Target Material ND3 Target Length 3 cm fdil 6/20 pf 0.8 Pzz 20% E0 11 GeV xBjorken 0.1, 0.3, 0.5, 0.75, 1.0 Q2 Variable θq Calculated θe' Calculated E' Calculated W Calculated
- → θe' and E' limits were added for each spectrometer
- → Error bars shown are statistical only
- → F1 and F2 are calculated using the Bosted fits, which lets us extend into a higher <x> range
- → It is valid for 0<W<3.2 GeV and 0.2<Q2<5 GeV2
- → The error bars are calculated from:
Maximizing Rate (Minimizing Azz)
If we set the spectrometer such that we aim to increase the rate as high as we can, it will get us the lowest (statistically) achievable Azz.
The settings above give us the highest rates we can achieve, and thus the lowest error bars on Azz. Each of the <x> values is set over the course of 1 PAC-week, allowing us to take any four of the above points.
<x> dAzz with SHMS dAzz with HMS db1 with SHMS db1 with HMS 0.1 ??? ??? ??? ??? 0.3 ??? ??? ??? ??? 0.5 ??? ??? ??? ??? 0.75 ??? ??? ??? ??? 1.0 ??? ??? ??? ???
The db1 Problem
→ Since db1 is calculated from 
, it is dependent upon F1
→ For each of the <x> values that I've been looking at, the following show what the Bosted code produces as a function of Structure Function vs. Q^2
→ The two vertical lines indicate the Q 2 values where dAzz has been minimized
Structure Function vs. Q 2 for <x>=0.1
Structure Function vs. Q 2 for <x>=0.3
Structure Function vs. Q 2 for <x>=0.5
Structure Function vs. Q 2 for <x>=0.75
Structure Function vs. Q 2 for <x>=1.0
Minimizing db1
If we set the spectrometer at the lowest allowed values of F1 (from above), it will get us the lowest (statistically) achievable db1.
The settings above give us the lowest statistical error bars we can achieve on db1. Each of the <x> values is set over the course of 1 PAC-week, allowing us to take any four of the above points.
<x> dAzz with SHMS dAzz with HMS 0.1 ??? ??? 0.3 ??? ??? 0.5 ??? ??? 0.75 ??? ??? 1.0 ??? ???
--E. Long 17:20, 26 April 2013 (UTC)
