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Emittance and lifetime measurement with damping wigglers

Journal Article · · Review of Scientific Instruments
DOI:https://doi.org/10.1063/1.4942903· OSTI ID:1354353
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
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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. Here, 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.
Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI ID:
1354353
Alternate ID(s):
OSTI ID: 22597076
Report Number(s):
BNL--112869-2016-JA
Journal Information:
Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 3 Vol. 87; ISSN 0034-6748; ISSN RSINAK
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

References (6)

An ultra-low emittance mode for PEP using damping wigglers journal April 1988
Measuring and optimizing the momentum aperture in a particle accelerator journal May 2002
Achievement of Ultralow Emittance Beam in the Accelerator Test Facility Damping Ring journal February 2004
Systematic approach to damping ring design journal February 2001
Handbook of Accelerator Physics and Engineering book May 2013
NSLS-II SR Commissioning Report report April 2015

Cited By (2)

New aspects of longitudinal instabilities in electron storage rings journal August 2018
Investigation of periodically driven systems by x-ray absorption spectroscopy using asynchronous data collection mode journal April 2018

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Related Subjects

47 OTHER INSTRUMENTATION
Accelerated beams
Cameras
Diffraction optics
Insertion device
Particle accelerators
Radiofrequency cavities
Storage rings
Synchrotron radiation
Transformer
X-ray diagnostics