A multipole superconducting wiggler for Canadian light source

Abstract

A contract for multipole superconducting wiggler design and fabrication between the University of Saskatchewan (Canada) and Budker Institute of Nuclear Physics (BINP) was signed in October 2003. The wiggler with the photons energy range from 4 to 40 keV, the maximumˇeld 1.9 T and the period length as small as possible was required for the micro-XAFS beamline. In 2004 the 2 T 63-pole superconducting wiggler with the average period length 34 mm was fabricated at BINP. To eliminate the undulator type spectrum the periodicity of the wiggler was broken. A new approach to the cryostat design enabled the long time (up to 6 months) machine operation without liquid helium reˇlling (LHe consumption < 0.03 l/h). In January 2005 after successful tests the wiggler was installed on the Canadian Light Source (CLS) storage ring with the energy 2.9 GeV. The main parameters of the magnet and the cryogenic systems as well as magnet measurements data, cryogenic system test data and experimental results during machine operation on the CLS storage ring are presented.

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

“…4), creating a number of dipoles with fixed interpole gaps determined by stainless steel spacers. The operating current and, consequently, the power loss by the leads were reduced substantially because a conventionally used wire 0.9 mm in diameter [1,2] was replaced with a thinner wire with a diameter of 0.55 mm. In spite of the relatively small field (2.2 T) at the orbit, the coil field reaches 4.7 T and the SC wire is in a state close to that described by the critical curve (Fig.…”

In vacuum permanent magnet wiggler optimized for the production of hard x rays

“…At DIAMOND (3 GeV) [10] and ELETTRA (2.1 GeV) [11] two superconducting wigglers of 49 poles producing a field of 3.5 T with periods of 60 and 64 mm, respectively, have been tested on beam. At Canadian Light Source (2.9 GeV) the superconducting wiggler operates with a low field and a small period (B 0 ¼ 2 T, 0 ¼ 34 mm) [12], and to avoid the structure appearing in the spectrum because of the low a w value, the spatial periodicity of the magnetic field has been modulated.…”