hbd alignment in run-10 (update) mihael makek weizmann institute of science hbd meeting, 8/12/2010
TRANSCRIPT
![Page 1: HBD Alignment in Run-10 (update) Mihael Makek Weizmann Institute of Science HBD Meeting, 8/12/2010](https://reader036.vdocuments.mx/reader036/viewer/2022062519/5697bfe31a28abf838cb5078/html5/thumbnails/1.jpg)
Mihael MakekWeizmann Institute of Science
HBD Meeting, 8/12/2010
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Detector movements during Run-10
Run(s) selected for alignment
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• Goal: determine time variations of HBD offsets• Selected data: CCNT - hadrons
• Good quality tracks (31,51,63)• n0 < 0• Emcal matching
• Selected subsample:• p > 0.7 GeV/c• Hbdsize = 1• Restricted geometry in HBD modules• Centrality > 50%
The dataset
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Sign dependence
Select particles with p > 0.7 GeV/c to avoid sign dependence
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Matching in phi (run 307035)
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Matching in z (run 307035)
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Offsets in phi
The blue line – weighted average EASTThe red line – weighted average WEST
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Offsets in zZ-offsets for East and West are moving synchronously cannot be connected with carriage movements.
BBC calibration?Beam related?
The blue line – weighted average EASTThe red line – weighted average WEST
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Check the systemactics of the methodLook at two very close runs:
the difference comparable or smaller than the errors
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Offsets in phi - table
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Offsets in z - table