Global DC closed orbit correction experiments on the NSLS X-ray ring and SPEAR
No abstract prepared.
Global DC closed orbit correction experiment on the NSLS x-ray ring
Abstract
In this note are described the global DC closed orbit correction experiments conducted on the X-ray ring at National Synchrotron Light Source (NSLS). The beam response matrix, defined as beam motion at BPM locations per unit kick by corrector magnets, was measured and then inverted using the technique of singular value decomposition (SVD). The product of the inverted matrix and the difference orbit gives the incremental kick strengths necessary to correct the orbit. As a result, the r.m.s. orbit error around the ring was reduced from 208 {mu}m to 61 {mu}m.
- Authors:
- Publication Date:
- Research Org.:
- Argonne National Lab., IL (United States)
- Sponsoring Org.:
- USDOE, Washington, DC (United States)
- OSTI Identifier:
- 87843
- Report Number(s):
- LS-213
ON: DE95015568; TRN: 95:017848
- DOE Contract Number:
- W-31109-ENG-38
- Resource Type:
- Technical Report
- Resource Relation:
- Other Information: PBD: 15 Sep 1992
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 43 PARTICLE ACCELERATORS; NSLS; ORBITS; CORRECTIONS
Citation Formats
Chung, Y., Decker, G., and Evans, K.. Global DC closed orbit correction experiment on the NSLS x-ray ring. United States: N. p., 1992.
Web. doi:10.2172/87843.
Chung, Y., Decker, G., & Evans, K.. Global DC closed orbit correction experiment on the NSLS x-ray ring. United States. doi:10.2172/87843.
Chung, Y., Decker, G., and Evans, K.. Tue .
"Global DC closed orbit correction experiment on the NSLS x-ray ring". United States.
doi:10.2172/87843. https://www.osti.gov/servlets/purl/87843.
@article{osti_87843,
title = {Global DC closed orbit correction experiment on the NSLS x-ray ring},
author = {Chung, Y. and Decker, G. and Evans, K.},
abstractNote = {In this note are described the global DC closed orbit correction experiments conducted on the X-ray ring at National Synchrotron Light Source (NSLS). The beam response matrix, defined as beam motion at BPM locations per unit kick by corrector magnets, was measured and then inverted using the technique of singular value decomposition (SVD). The product of the inverted matrix and the difference orbit gives the incremental kick strengths necessary to correct the orbit. As a result, the r.m.s. orbit error around the ring was reduced from 208 {mu}m to 61 {mu}m.},
doi = {10.2172/87843},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Sep 15 00:00:00 EDT 1992},
month = {Tue Sep 15 00:00:00 EDT 1992}
}
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Global DC closed orbit correction experiments on the NSLS X-ray ring and SPEAR
The global closed orbit correction experiments conducted on the NSLS X-my ring and the SPEAR using the technique of singular value decomposition (SVD) are presented. The beam response matrix, defined as beam motion at beam position monitor (BPM) locations per unit kick by correctors magnets, was measured and then analyzed using SVD. The BPMs and correctors are reconfigured into ``transformed`` BPMs (t-BPMs) and ``transformed`` correctors (t-correctors), with each t-BPM coupled to at most one t-corrector and vice versa for orbit correction. The decoupled t-BPMs are used to estimate the limit on orbit correction, while the decoupled t-correctors are used tomore » -
Real time global orbit feedback system for NSLS x-ray ring
We report on the design and commissioning of a real time harmonic global orbit feedback system for the NSLS X-ray ring. This system uses 8 pick-up electrode position monitors and 16 trim dipole magnets to eliminate 3 harmonic components of the orbit fluctuations. Because of the larger number of position monitors and trim magnets, the X-ray ring feedback system differs from the previously reported VUV ring system in that the Fourier analysis and harmonic generation networks are comprised of MDAC boards controlled by computer. The implementation of the global feedback system has resulted in a dramatic improvement of orbit stability,more »