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Title: Measurement and correction of linear optics and coupling at tevatron complex

Abstract

The optics measurements have played important role in improving the performance of Tevatron collider. Until recently, most of them were based on the differential orbit measurements with data analysis, which neglects measurement inaccuracies such as differences in differential responses of beam position monitors, their rolls, etc. To address these complications we have used a method based on the analysis of many differential orbits. That creates the redundancy in the data allowing to get more detailed understanding of the machine. In this article we discuss the progress with Tevatron optics correction, its present status and future improvements.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
897077
Report Number(s):
FERMILAB-CONF-06-206-AD
TRN: US0701067
DOE Contract Number:
AC02-07CH11359
Resource Type:
Conference
Resource Relation:
Journal Name: Nucl.Instrum.Meth.A558:299-302,2006; Conference: Prepared for 8th International Computational Accelerator Physics Conference (ICAP 2004), St. Petersburg, Russia, 29 Jun - 2 Jul 2004
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ACCELERATORS; BEAM POSITION; DATA ANALYSIS; FERMILAB TEVATRON; MONITORS; OPTICS; PERFORMANCE; PHYSICS; REDUNDANCY; Accelerators

Citation Formats

Lebedev, V., Nagaslaev, V., Valishev, A., /Fermilab, Sajaev, V., and /Argonne. Measurement and correction of linear optics and coupling at tevatron complex. United States: N. p., 2006. Web.
Lebedev, V., Nagaslaev, V., Valishev, A., /Fermilab, Sajaev, V., & /Argonne. Measurement and correction of linear optics and coupling at tevatron complex. United States.
Lebedev, V., Nagaslaev, V., Valishev, A., /Fermilab, Sajaev, V., and /Argonne. Sun . "Measurement and correction of linear optics and coupling at tevatron complex". United States. doi:. https://www.osti.gov/servlets/purl/897077.
@article{osti_897077,
title = {Measurement and correction of linear optics and coupling at tevatron complex},
author = {Lebedev, V. and Nagaslaev, V. and Valishev, A. and /Fermilab and Sajaev, V. and /Argonne},
abstractNote = {The optics measurements have played important role in improving the performance of Tevatron collider. Until recently, most of them were based on the differential orbit measurements with data analysis, which neglects measurement inaccuracies such as differences in differential responses of beam position monitors, their rolls, etc. To address these complications we have used a method based on the analysis of many differential orbits. That creates the redundancy in the data allowing to get more detailed understanding of the machine. In this article we discuss the progress with Tevatron optics correction, its present status and future improvements.},
doi = {},
journal = {Nucl.Instrum.Meth.A558:299-302,2006},
number = ,
volume = ,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2006},
month = {Sun Jan 01 00:00:00 EST 2006}
}

Conference:
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  • The optics measurements have played important role in improving the performance of Tevatron collider. Until recently, most of them were based on the differential orbit measurements with data analysis, which neglects measurement inaccuracies such as differences in differential responses of beam position monitors, their rolls, etc. To address these complications we have used a method based on the analysis of many differential orbits. That creates the redundancy in the data allowing to get more detailed understanding of the machine. In this article, we discuss the progress with Tevatron optics correction, its present status and future improvements.
  • The Fourier analysis of Turn by Turn (TBT) data provides valuable information about the machine linear and non-linear optics. A program for the measurement and correction of the linear coupling based on the TBT data analysis has been integrated in the TEVATRON control system. The new method is fast, allows the measurement of the coupling during acceleration and offers information about the sum coupling coefficient and the location of the sources of coupling.
  • We propose a method to simultaneously correct linear optics errors and linear coupling for storage rings using turn-by-turn (TbT) beam position monitor (BPM) data. The independent component analysis (ICA) method is used to isolate the betatron normal modes from the measured TbT BPM data. The betatron amplitudes and phase advances of the projections of the normal modes on the horizontal and vertical planes are then extracted, which, combined with dispersion measurement, are used to fit the lattice model. Furthermore, the fitting results are used for lattice correction. Our method has been successfully demonstrated on the NSLS-II storage ring.
  • We propose a method to simultaneously correct linear optics errors and linear coupling for storage rings using turn-by-turn (TbT) beam position monitor (BPM) data. The independent component analysis (ICA) method is used to isolate the betatron normal modes from the measured TbT BPM data. The betatron amplitudes and phase advances of the projections of the normal modes on the horizontal and vertical planes are then extracted, which, combined with dispersion measurement, are used to fit the lattice model. The fitting results are used for lattice correction. The method has been successfully demonstrated on the NSLS-II storage ring.