Difference between revisions of "R3833 Efficiency1"
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[[File:r3833_1WireHitsRow-vs-Column.png | 200 px]] | [[File:r3833_1WireHitsRow-vs-Column.png | 200 px]] | ||
| − | Most of the hits are in row 9 | + | Most of the hits are in row 9. |
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[[File:r3833_1WireHitsCol9N.png | 200 px]] | [[File:r3833_1WireHitsCol9N.png | 200 px]] | ||
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| + | If I now require that Wires 1-3 and 5-6 from column 9 have hits and then ask how many hits did wire 4 have I get an efficiency of about 98%. | ||
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| + | [[File:r3833_1WireHitsCol9n5wires.png | 200 px]] | ||
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| + | Using run 3834, the efficiency increase to 99% when the discriminator is increased from -30 mV to -60 mV | ||
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| + | [[File:r3834_1WireHitsCol9n5wires.png | 200 px]] | ||
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[[CLAS12_R1_S1_QA]] | [[CLAS12_R1_S1_QA]] | ||
Latest revision as of 21:01, 7 March 2013
My first attempt at an efficiency measurement compares wire hits when you require that the first (wire 1) and last (wire 6) wires in a single super layer are hit.
First I looked at which wires were hit when I require that there is a hit on wire 1 and wire 2.
HV was G:F:S = 536:-750:1500 Volts
Most of the hits are in row 9.
If I histogram all wire hits requiring a hit in both wire 1, wire 6 and row 9 I see the following
Now I divide by the number of hits seen by both wire 1 and wire 6
If I now require that Wires 1-3 and 5-6 from column 9 have hits and then ask how many hits did wire 4 have I get an efficiency of about 98%.
Using run 3834, the efficiency increase to 99% when the discriminator is increased from -30 mV to -60 mV
