Superconducting 119-pole wiggler with a 2.1-T field and 30-mm period length for the ALBA storage ring

A superconducting 119-pole wiggler with a 2.1-T operating field and 30-mm period length, which is intended for use at the ALBA Synchrotron Light Facility (SLF), Barcelona, Spain, has been designed and manufactured at the Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia. The interpole gap and aperture of the beam are 12.6 and 8.5 mm respectively. The total radiation power reaches 16 kW when the current of the 3-GeV electron beam is 0.4 A. In May 2010, after successful testing in Novosibirsk, the wiggler was transported to the ALBA SLF and was retested outside of the storage ring. The maximum field achieved by training of the magnet is 2.26 T. Owing to the improved cryostat structure, the equilibrium operating temperature of the magnet is brought down to 3.5 K, guaranteeing reliable operation of the device and zero liquid helium consumption. The basic parameters of the wiggler??s magnetic and cryogenic systems, as well as the results of their tests, are presented.