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Title: Tuning the narrow-band beam position monitor sampling clock to remove the aliasing errors in APS storage ring orbit measurements.

Abstract

The Advanced Photon Source storage ring employs a real-time orbit correction system to reduce orbit motion up to 50 Hz. This system uses up to 142 narrow-band rf beam position monitors (Nbbpms) in a correction algorithm by sampling at a frequency of 1.53 kHz. Several Nbbpms exhibit aliasing errors in orbit measurements, rendering these Nbbpms unusable in real-time orbit feedback. The aliasing errors are caused by beating effects of the internal sampling clocks with various other processing clocks residing within the BPM electronics. A programmable external clock has been employed to move the aliasing errors out of the active frequency band of the real-time feedback system (RTFB) and rms beam motion calculation. This paper discusses the process of tuning and provides test results.

Authors:
;  [1]
  1. (Accelerator Systems Division (APS))
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1014787
Report Number(s):
ANL/ASD/CP-59537
TRN: US1102747
DOE Contract Number:  
DE-AC02-06CH11357
Resource Type:
Conference
Resource Relation:
Conference: Particle Accelerator Conference (PAC07); Jun. 25, 2007 - Jun. 29, 2007; Albuquerque, NM
Country of Publication:
United States
Language:
ENGLISH
Subject:
43 PARTICLE ACCELERATORS; ACCELERATORS; ADVANCED PHOTON SOURCE; ALGORITHMS; BEAM POSITION; FEEDBACK; MONITORS; PROCESSING; SAMPLING; STORAGE RINGS; TUNING

Citation Formats

Sun, X., and Singh, O.. Tuning the narrow-band beam position monitor sampling clock to remove the aliasing errors in APS storage ring orbit measurements.. United States: N. p., 2007. Web. doi:10.1109/PAC.2007.4440019.
Sun, X., & Singh, O.. Tuning the narrow-band beam position monitor sampling clock to remove the aliasing errors in APS storage ring orbit measurements.. United States. doi:10.1109/PAC.2007.4440019.
Sun, X., and Singh, O.. Mon . "Tuning the narrow-band beam position monitor sampling clock to remove the aliasing errors in APS storage ring orbit measurements.". United States. doi:10.1109/PAC.2007.4440019.
@article{osti_1014787,
title = {Tuning the narrow-band beam position monitor sampling clock to remove the aliasing errors in APS storage ring orbit measurements.},
author = {Sun, X. and Singh, O.},
abstractNote = {The Advanced Photon Source storage ring employs a real-time orbit correction system to reduce orbit motion up to 50 Hz. This system uses up to 142 narrow-band rf beam position monitors (Nbbpms) in a correction algorithm by sampling at a frequency of 1.53 kHz. Several Nbbpms exhibit aliasing errors in orbit measurements, rendering these Nbbpms unusable in real-time orbit feedback. The aliasing errors are caused by beating effects of the internal sampling clocks with various other processing clocks residing within the BPM electronics. A programmable external clock has been employed to move the aliasing errors out of the active frequency band of the real-time feedback system (RTFB) and rms beam motion calculation. This paper discusses the process of tuning and provides test results.},
doi = {10.1109/PAC.2007.4440019},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}

Conference:
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