Improvements:

1

• Improvements
• Track fitting done before coord adjustment so
  that tracks in vertex are the same.
• Noise filter to remove influence of spikes in
  current measurement.
• Measurement of variance of fitted track
  intercepts w.r.t. fitted vertex point calculated.

2
Code to reweight time using integrated current
Average both current measurements
for(int i0 iltne i) t-gtGetEntry(i) time
vr-gtGetScanCounter() new_v(vr-gtGetCurrent(1)
vr-gtGetCurrent(0)) if (new_v gt 10000)
new_vold_v integ_inew_v(i-oldi) histo-gtFil
l(i, integ_i) oldii old_vnew_v double
time125000 double time2tmax double
x1histo-gtGetBinContent(time1) double
x2histo-gtGetBinContent(time2) double
scale(time2-time1)/(x2-x1) for (int i0 iltne
i) histo-gtSetBinContent(i,histo-gtGetBinContent(i
)-1.0x1) histo-gtScale(scale) for (int i0
iltne i) histo-gtSetBinContent(i,histo-gtGetBinCon
tent(i)time1) for (int i0 iltne
i) histo-gtSetBinContent(i,histo-gtGetBinContent(i
)-i)
Removes noise which causes current spikes
Change of scale so that integrated current coord
is approximately same values as time coordinate
Applies coord adjustment to found hits
for (int i0 iltdatahits.size() i) int
tempdatahitsi-gtGetTime() datahitsi-gtSetTime
(temphTime-gtGetBinContent(temp))
3
Injection 1
pixel
BEFORE ADJUSTMENT
Time 8637.86 /- 5.34148 Pixel -24453 /-
3.09066 Chi squared 0.471894 N Tracks 80
VAR 168.216
time
4
Injection 1
Points after adjustment (RED)
Time correction
time difference
Points before adjustment (BLACK)
time
Points refer to time difference between track fit
and fitted vertex position
5
Injection 1
pixel
AFTER ADJUSTMENT
Time 3751.81 /- 6.1604 Pixel -28619.6 /-
3.63687 Chi squared 0.235298 N Tracks 80
VAR 137.944
time
6
Injection 2
pixel
BEFORE ADJUSTMENT
Time 8928.33 /- 5.38882 Pixel -24174.6 /-
3.6964 Chi squared 3.77126 N Tracks 76
VAR 487.245
time
7
Injection 2
time difference
time
8
Injection 2
pixel
AFTER ADJUSTMENT
Time 3864.74 /- 6.42039 Pixel -28404.6 /-
4.35373 Chi squared 0.342951 N Tracks 76
VAR 158.462
time
9
Injection 3
pixel
BEFORE ADJUSTMENT
Time 8321.51 /- 5.24539 Pixel -24468.2 /-
3.1386 Chi squared 1.81517 N Tracks 89
VAR 384.11
time
10
Injection 3
time difference
time
11
Injection 3
pixel
AFTER ADJUSTMENT
Time 3771.01 /- 6.00151 Pixel -28342.3 /-
3.643 Chi squared 0.367116 N Tracks 89
VAR 180.911
time
12
Injection 4
pixel
BEFORE ADJUSTMENT
Time 4562.96 /- 6.64489 Pixel -28597.3 /-
5.12349 Chi squared 0.31703 N Tracks 81
VAR 158.816
time
13
Injection 4
time difference
time
14
Injection 4
pixel
AFTER ADJUSTMENT
Time 3744.65 /- 6.84254 Pixel -29261.4 /-
5.20204 Chi squared 0.18109 N Tracks 81
VAR 108.297
time
15
CROSS CHECK Using X injection adjustment on Y
injection
pixel
BEFORE ADJUSTMENT
Time 8928.33 /- 5.38882 Pixel -24174.6 /-
3.6964 Chi squared 3.77126 N Tracks 76
VAR 487.245
time
16
CROSS CHECK Using 1 injection adjustment on 2
injection
time difference
time
17
CROSS CHECK Using X injection adjustment on Y
injection
pixel
AFTER ADJUSTMENT
Time 4180.49 /- 6.40963 Pixel -28198.2 /-
4.35684 Chi squared 2.90576 N Tracks 76
VAR 582.539
time