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Tried different scripts: cutting just charge and entering resolutions for doublets and triplets

Tried different scripts: cutting just charge and entering resolutions for doublets and triplets cutting charge and chi2<=1 entering resolutions for doublets and triplets cutting charge and chi2<=1 entering individual resolutions for each BPM

vladimir-davenport
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Tried different scripts: cutting just charge and entering resolutions for doublets and triplets

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  1. Tried different scripts: • cutting just charge and entering resolutions for doublets and triplets • cutting charge and chi2<=1 entering resolutions for doublets and triplets • cutting charge and chi2<=1 entering individual resolutions for each BPM • cutting charge and chi2<=1 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 P1=0.2062+-0.01945

  4. cutting charge and chi2<=1 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 P1=0.04856+-0.07136

  5. cutting charge and chi2<=1 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 P1=0.04888+-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 chi2<=1 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+-0.05412 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)

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