A superconducting wiggler magnet for the NSLS X-ray ring

Abstract

Abstractrepresent the state of the art. Oxford Instruments is nowThe superconducting 5 pole, 5 Tesla wiggler which has been operating in the X-17 straight section of the x-ray storage ring at the National Synchrotron Light Source (NSLS) since 1989 will soon be replaced by a new wiggler being built by Oxford Instruments with lower operating costs, higher reliability, and greater performance. The new wiggler has three modes of operation: the full wiggler with 11 poles producing 3.0 T, the partial wiggler with 5 poles at 4.7 T, and the wavelength shifter with a single pole producing 5.5 T. The full wiggler, optimized for the digital subtraction radiography program, will produce the same x-ray flux at the 33 KeV iodine K-edge as the existing wiggler operating at 4.7 T but will reduce the higher energy harmonics delivered to the target. The partial wiggler will deliver the same flux for solid state physics experiments as the existing wiggler, and the wavelength shifter will provide an elliptically polarized x-ray beam that is not now available.

Magnetic Field Design of a Superconducting Multipole Wiggler for Imaging and Biomedical Application Beamline

“…T HE superconducting multipole wiggler was designed and constructed at many different synchrotron light source [1]- [4]. The first multipole wiggler (W14) for SSRF is a 2 T normal conducting wiggler with a period length of 140 mm and critical energy of 15.84 keV.…”