Beams Document 1925-v1

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TeV BPM Upgrade: Stability and Calibration

Document #:
Beams-doc-1925-v1
Document type:
Note
Submitted by:
Robert K Kutschke
Updated by:
Robert K Kutschke
Document Created:
02 Aug 2005, 19:35
Contents Revised:
02 Aug 2005, 19:39
Metadata Revised:
02 Aug 2005, 19:39
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Beams-doc-1925-v0
02 Aug 2005, 19:35
Abstract:
This note shows data that illustrate the stability of the TeV BPM measurements with time: the proton measurements are repeatable to better than 40~$\mu$m (RMS) over a period of 6 weeks and the anti-proton measurements are repeatable to better than 50~$\mu$m (RMS) over the same period. These numbers are upper bounds and the stability of the measurements is probably better than this. This note also shows that the information about the differential attenuation in the analog portions of the system is not useful; improved measurements of the differential attenuation in the cables are needed. Finally this note discusses an anomaly that was reported on VC11; the anomaly is real and I have not yet found a fix.
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