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Title: Fast and precise technique for magnet lattice correction via sine-wave excitation of fast correctors

A novel technique has been developed to improve the precision and shorten the measurement time of the LOCO (linear optics from closed orbits) method. This technique, named AC LOCO, is based on sine-wave (ac) beam excitation via fast correctors. Such fast correctors are typically installed at synchrotron light sources for the fast orbit feedback. The beam oscillations are measured by beam position monitors. The narrow band used for the beam excitation and measurement not only allows us to suppress effectively the beam position noise but also opens the opportunity for simultaneously exciting multiple correctors at different frequencies (multifrequency mode). We demonstrated at NSLS-II that AC LOCO provides better lattice corrections and works much faster than the traditional LOCO method.
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  1. Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
Publication Date:
Report Number(s):
Journal ID: ISSN 2469-9888; PRABCJ; TRN: US1800474
Grant/Contract Number:
SC0012704; AC02-98CH10886
Published Article
Journal Name:
Physical Review Accelerators and Beams
Additional Journal Information:
Journal Volume: 20; Journal Issue: 5; Journal ID: ISSN 2469-9888
American Physical Society (APS)
Research Org:
Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
43 PARTICLE ACCELERATORS; NSLS-II; LOCO; linear optics; closed orbits; National Synchrotron Light Source II
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1413915