Design of a Magnet for the Spin-Rotator Device for the High Magnetic Field [Formula Omitted] Instrument at Paul Scherrer Institute

• Published in: IEEE transactions on applied superconductivity Vol. 22; no. 3; p. 4101204
• Main Authors: Vrankovic, V, Gabard, A, Meier, I, Stutz, R, Deckardt, R, Sanfilippo, S, Scheuermann, R, Sedlak, K, Reggiani, D, Deiters, K, Rauber, T, Kaufmann, P, Walther, H
• Format: Journal Article
• Language: English
• Published: New York The Institute of Electrical and Electronics Engineers, Inc. (IEEE) 01.06.2012
• ISSN: 1051-8223; 1558-2515
• DOI: 10.1109/TASC.2011.2178014

In this work we present the design, the construction and the measurements of the magnet for a so-called spin-rotator (Wien filter), a beam line device used to rotate the spin direction (and the associated magnetic moment) of muons in a beam used for condensed matter research at the Swiss Muon Source at the Paul Scherrer Institute. The design parameters--originating both from the properties of the preferred particle beam as well as the technological constraints for the high-voltage components generating the necessary electric field--were optimized for device compactness, cost and high beam transmission.