CERN Accelerating science

Article
Title	Design of Switching Magnet for 20-MeV Beamlines at PEFP
Author(s)	Suh, Hyung S ; Jeong, Seong-Hun ; Jung, Young-Gyu ; Kang Heung Sik ; Lee, Hong-Gi ; Park, Ki-Hyeon ; Ryu, Chun-Kil ; Sik Han, Hong
Affiliation	(PAL, Pohang)
Publication	2005
In:	21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.1575
Subject category	Accelerators and Storage Rings
Abstract	The PEFP(Proton Engineering Frontier Project) proton linac is designed to have two proton beam extraction lines at the 20-MeV and 100-MeV end. The 20-MeV extraction line is branched out into 5 beamlines by using the switching magnet. The magnet bends the proton beam by +20, +10, 0, -10, -20 degrees, respectively, and has an AC frequency of 5 Hz with a programmable ac power supply. It employs an H-shape, 0.45 T magnetic field, 0.5 m effective magnet length, 30x5 cm bore aperture. The pole shape is optimized for the field levels. Laminated steel of 0.5 mm is enough to suppress the eddy current effect in the yoke. This paper presents the magnet specification and primary design.