Emittance and lifetime measurement with damping wigglers

Journal Article · Tue Mar 15 04:00:00 EDT 2016 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4942903· OSTI ID:22597076

Wang, G. M.; Cheng, W. X.; Guo, W.; Ilinsky, P.; Li, Y.; Podobedov, B.; Willeke, F. ^[1]

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1. National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York 11793 (United States)

National Synchrotron Light Source II (NSLS-II) is a new third-generation storage ring light source at Brookhaven National Laboratory. The storage ring design calls for small horizontal emittance (<1 nm-rad) and diffraction-limited vertical emittance at 12 keV (8 pm-rad). Achieving low value of the beam size will enable novel user experiments with nm-range spatial and meV-energy resolution. The high-brightness NSLS-II lattice has been realized by implementing 30-cell double bend achromatic cells producing the horizontal emittance of 2 nm rad and then halving it further by using several Damping Wigglers (DWs). This paper is focused on characterization of the DW effects in the storage ring performance, namely, on reduction of the beam emittance, and corresponding changes in the energy spread and beam lifetime. The relevant beam parameters have been measured by the X-ray pinhole camera, beam position monitors, beam filling pattern monitor, and current transformers. In this paper, we compare the measured results of the beam performance with analytic estimates for the complement of the 3 DWs installed at the NSLS-II.

• OSTI ID: 22597076
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 3 Vol. 87; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
BEAM EMITTANCE
BEAMS
BNL
BRIGHTNESS
CAMERAS
COMPARATIVE EVALUATIONS
DAMPING
DIFFRACTION
ENERGY RESOLUTION
LIGHT SOURCES
NSLS
STORAGE RINGS
TRANSFORMERS
X RADIATION