DocumentCode
2895242
Title
RHIC beam-based sextupole polarity verification
Author
Luo, Y. ; Satogata, T. ; Cameron, P. ; DellaPenna, A. ; Trbojevic, D.
Author_Institution
Brookhaven Nat. Lab., Upton
fYear
2007
fDate
25-29 June 2007
Firstpage
1868
Lastpage
1870
Abstract
THis article presents a beam-based method to check RHIC arc sextupole polarities using local horizontal orbit three-bumps at injection energy. We use 11 bumps in each arc, each covering two SFs (focusing sextupoles) and one SD (defocusing sextupole). If there are no wrong sextupole polarities, the tune shifts from bump to bump and the tune shift patterns from arc to arc should be similar. Wrong sextupole polarities can be easily identified from mismatched signs or amplitudes of tune shifts from bump to bump and/or from arc to arc. Tune shifts in both planes during this study were tracked with a high-resolution base-band tunemeter (BBQ) system. This method was successfully used to the sextupole polarity check in RHIC blue and yellow rings in the RHIC 2006 and 2007 runs.
Keywords
ion accelerators; storage rings; synchrotrons; RHIC; beam-based method; high-resolution baseband tunemeter; injection energy; sextupole polarities; yellow rings; Baseband; Data acquisition; Laboratories; Lattices;
fLanguage
English
Publisher
ieee
Conference_Titel
Particle Accelerator Conference, 2007. PAC. IEEE
Conference_Location
Albuquerque, NM
Print_ISBN
978-1-4244-0916-7
Type
conf
DOI
10.1109/PAC.2007.4440925
Filename
4440925
Link To Document