Tried different scripts:

1

• Tried different scripts
• cutting just charge and entering resolutions for
  doublets and triplets
• cutting charge and chi2lt1 entering resolutions
  for doublets and triplets
• cutting charge and chi2lt1 entering individual
  resolutions for each BPM
• cutting charge and chi2lt1 entering individual
  resolutions for each BPM and removing BPM32 and
  BPM3
• I will show the results for run in sandwich 1
  slot 4 number 624, with reference in slot 0
  number 623.

2
Old way of measuring resolutions
(collective) For doublets the script
calculates the error (std/sqrt(2)) of the
differences between each BPM, and assigns to each
BPM of the doublet the same resolution. For
triplets the script fits the two external BPM
measurements and calculates de difference between
the measurement of the middle one and its
predicted value. The error of the distribution is
the resolution and it is assigned to the three
BPMs of the triplet. New way of measuring
resolutions (individual) It can only be
performed in a reference (better if it is in slot
0). It does a linear fit of all the BPMs not
using the BPM which we want to know the
resolution. It predicts a value for this BPM and
makes the difference with its real measurement.
The error on the distribution gives the
resolution for this BPM. The same is done with
the rest. Each BPM has a different resolution.
3
cutting just charge and entering resolutions for
doublets and triplets
Res First doublet 43.1 um Second doublet 13.3
um First triplet 31.9 um Second triplet 7.1
um P10.2062-0.01945
4
cutting charge and chi2lt1 entering resolutions
for doublets and triplets
Res First doublet 43.1 um Second doublet 13.3
um First triplet 31.9 um Second triplet 7.1
um P10.04856-0.07136
5
cutting charge and chi2lt1 entering individual
resolutions for each BPM
Res BPM31 44.4 um BPM32 64.1 um BPM41 26.6
um BPM42 33.2 um BPM3 55.8 um BPM4 26.1
um BPM5 28.5 um BPM9 14.6 um BPM10 15.9
um BPM11 13.1 um P10.04888-0.05555
BPM32 seems to have a bad resolution, the same
for BPM3, in the next slide I have removed them
from the analysis.
6
cutting charge and chi2lt1 entering individual
resolutions for each BPM and removing BPM32 and
BPM3
Res BPM31 50.1 um BPM41 19.3 um BPM42 27.2
um BPM4 26.4 um BPM5 29.7 um BPM9 9.4
um BPM10 12.0 um BPM11 8.2 um P1-0.06815-0.05
412
Right sign of the kickfactor
7
For our fantastic run 1206 with ref 1205
With collective resolutions and chi2 cuts
With individual resolutions and chi2 cuts
8
Runs in sandwich 1 slot 3 from April, removing
the collimator position at 1 mm and the BPM9
(with collective resolutions and chi2 cuts)
544 (kf-0.32-0.07)
595 (kf-0.38-0.07)
619 (kf-0.25-0.07)
638 (kf-0.60-0.07)
657 (kf-0.31-0.07)