Validation of PEP-II resonantly excited turn-by-turn BMP Data

Author

Yan, Yiton T. ; Cai, Yunhai ; Colocho, William ; Decker, Franz-Josef

Author_Institution

SLAC, Stanford

fYear

2007

fDate

25-29 June 2007

Firstpage

3645

Lastpage

3647

Abstract

For optics measurement and modeling of the PEP-II electron (HER) and position (LER) storage rings, we have been doing well with MIA which requires analyzing turn-by-turn Beam Position Monitor (BPM) data that are resonantly excited at the horizontal, vertical, and longitudinal tunes. However, in anticipation that certain BPM buttons and even pins in the PEP-II IR region would be missing for the run starting in January 2007, we had been developing a data validation process to reduce the effect due to the reduced BPM data accuracy on PEP-II optics measurement and modeling. Besides the routine process for ranking BPM noise level through data correlation among BPMs with a singular-value decomposition (SVD), we could also check BPM data symplecticity by comparing the invariant ratios. Results from PEP-II measurement will be presented.

Keywords

electron accelerators; electron beams; noise; particle beam diagnostics; storage rings; BPM noise; PEP-II electron storage rings; PEP-II position storage rings; SVD; optics measurement; singular-value decomposition; turn-by-turn beam position monitor; Data mining; Extraterrestrial measurements; Geometrical optics; Lattices; Optical coupling; Orbital calculations; Orbits; Resonance; Solid modeling; Virtual machining;

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.2007.4440520

Filename

4440520