TY - JOUR
T1 - The NSLS VUV undulator
T2 - Spectral characteristics and operating experience
AU - Johnson, Peter D.
AU - Galayda, John
AU - Hulbert, Steven L.
AU - Klaffky, Roger W.
AU - Luccio, Alfredo
AU - Vignola, Gaetano
AU - Jacobsen, Chris
N1 - Funding Information:
The authorsw ith to acknowledgteh eg ratingd iffrac-tion efficiencyc alculationso f H. Padmore.T his work was supportedb y the Division of MaterialS ciencesU .S. Departmenot f Energy under ContractN o. DE-AC02-76CH00016.
PY - 1988/4/1
Y1 - 1988/4/1
N2 - The design and operating characteristics of the VUV undulator installed on the NSLS VUV ring are presented. Specifically, the spectral output through three circular on-axis pinholes of different diameters has been measured. Near the minimum magnetic gap (40 mm), the flux into a 0.25 mrad circular aperture at the peak of the fundamental (hv = 57 eV) is ≈ 1 × 1014 photons/(s·0.1 A·1% bandwidth). We find good agreement in spectral shape between these measured spectra and spectra calculated by integrating the theoretical undulator emission over the relevant spatial variables and including electron beam emittance. We also show calculated zero-emittance and on-axis flux spectra for comparison. A description is given of the beam line and monochromator currently installed on this undulator for the purpose of performing spin-resolved photoemission.
AB - The design and operating characteristics of the VUV undulator installed on the NSLS VUV ring are presented. Specifically, the spectral output through three circular on-axis pinholes of different diameters has been measured. Near the minimum magnetic gap (40 mm), the flux into a 0.25 mrad circular aperture at the peak of the fundamental (hv = 57 eV) is ≈ 1 × 1014 photons/(s·0.1 A·1% bandwidth). We find good agreement in spectral shape between these measured spectra and spectra calculated by integrating the theoretical undulator emission over the relevant spatial variables and including electron beam emittance. We also show calculated zero-emittance and on-axis flux spectra for comparison. A description is given of the beam line and monochromator currently installed on this undulator for the purpose of performing spin-resolved photoemission.
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U2 - 10.1016/0168-9002(88)90367-1
DO - 10.1016/0168-9002(88)90367-1
M3 - Article
AN - SCOPUS:0023325877
SN - 0168-9002
VL - 266
SP - 106
EP - 111
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
IS - 1-3
ER -