Preface: 18th Advanced Accelerator Concepts Workshop (AAC 2018)
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Accelerator Design, Technology, and Operations↗
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Wootton, Kent
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Direct Observation of Ultralow Vertical Emittance using a Vertical Undulator - presentation slides
Direct emittance measurement based on vertical undulator is discussed. Emittance was evaluated from peak ratios, the smallest measured being 𝜀𝑦 =0.9 ±0.3 pm rad. The angular distribution of undulator radiation departs from Gaussian approximations, a fact of which diffraction-limited light sources should be aware.
43 PARTICLE ACCELERATORS↗
Direct Observation of Ultralow Vertical Emittance using a Vertical Undulator
In recent work, the first quantitative measurements of electron beam vertical emittance using a vertical undulator were presented, with particular emphasis given to ultralow vertical emittances [K. P. Wootton, et al., Phys. Rev. ST Accel. Beams, 17, 112802 (2014)]. Using this apparatus, a geometric vertical emittance of 0.9 ± 0.3 pm rad has been observed. A critical analysis is given of measurement approaches that were attempted, with particular emphasis on systematic and statistical uncertainties. The method used is explained, compared to other techniques and the applicability of these results to other scenarios discussed.
43 PARTICLE ACCELERATORS↗