View source for R3833 Efficiency1

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


[[File:r3833_1WireHitsRow-vs-Column.png | 200 px]]

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

[[File:r3833_1WireHitsCol9.png | 200 px]]

Now I divide by the number of hits seen by both wire 1 and wire 6

[[File:r3833_1WireHitsCol9N.png | 200 px]]


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%.

[[File:r3833_1WireHitsCol9n5wires.png | 200 px]]


Using run 3834, the efficiency increase to 99% when the discriminator is increased from -30 mV to -60 mV

[[File:r3834_1WireHitsCol9n5wires.png | 200 px]]


[[CLAS12_R1_S1_QA]]