Beams Document 1894-v1

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Evaluation and correction of nonlinear effects in FNPL beam position monitors

Document #:
Beams-doc-1894-v1
Document type:
Note
Submitted by:
Philippe R.-G. Piot
Updated by:
Philippe R.-G. Piot
Document Created:
07 Jul 2005, 17:56
Contents Revised:
07 Jul 2005, 17:56
Metadata Revised:
07 Jul 2005, 17:56
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Abstract:
It was recently recognized that FNPL beam position monitors (BPMs) have a strong nonlinear response when the beam is at large offset with respect to the electric axis of the BPM. This nonlinearities spoil, for instance, difference orbit type measurements and need to be corrected. We present the correction implemented for the on-line orbit display software and compare with off line correction based on Reference.
Files in Document:
  • pdf file (nonlinear_response.pdf, 375.3 kB)
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