Difference between revisions of "Analysis Tools"
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== Electron Cuts == | == Electron Cuts == | ||
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| + | {| border="1" cellpadding="2" | ||
| + | |- | ||
| + | ! width="100pt" | '''Cut''' | ||
| + | ! width="100pt" | '''Description''' | ||
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| + | | L.cer.asum_c>400 || The gas Cherenkov ADC cut. The gas Cherenkov was [http://www.jlab.org/~flay/thesis/tech_notes/calib_note.pdf calibrated] so that the one photoelectron peak is centered at 200 ADC channels. [http://www.jlab.org/~flay/thesis/tech_notes/eff_note.pdf PID cut efficiency] studies show that the optimal cut position is at 400 ADC channels (2 photoelectrons). | ||
| + | |- | ||
| + | | abs(L.cer.t[i]-mean)<lim || The gas Cherenkov TDC cut. This cut is to accompany the above ADC cut. Note that this is a sum over i PMTs from 0 to 9. `mean' is the mean TDC peak position while `lim' is the cut window (in TDC channels). It is best to determine each of the i PMT mean peak positions for each run. | ||
| + | |} | ||
= BigBite = | = BigBite = | ||
Revision as of 08:53, 14 April 2011
Contents
Description
This page contains a glossary of cuts used in the d2n analysis for both the LHRS and BigBite detectors.
LHRS
The list of cuts below are presented in the form in which they are used in ROOT macros when carrying out calculations. These variable names are compatible with the Hall A Analyzer.
Electron Cuts
| Cut | Description |
|---|---|
| L.cer.asum_c>400 | The gas Cherenkov ADC cut. The gas Cherenkov was calibrated so that the one photoelectron peak is centered at 200 ADC channels. PID cut efficiency studies show that the optimal cut position is at 400 ADC channels (2 photoelectrons). |
| abs(L.cer.t[i]-mean)<lim | The gas Cherenkov TDC cut. This cut is to accompany the above ADC cut. Note that this is a sum over i PMTs from 0 to 9. `mean' is the mean TDC peak position while `lim' is the cut window (in TDC channels). It is best to determine each of the i PMT mean peak positions for each run. |
