CERN Accelerating science

Article
Title	Construction and Performance of Superconducting Magnets for Synchrotron Radiation
Author(s)	Hwang, Ching-Shiang ; Chang, Cheng-Hsiang ; Chang, Cheng-Kuo ; Chang, Ho-Ping ; Chen Chien Te ; Chen Hui Huang ; Chen, Jenny ; Chen June Rong ; Chien, Yuan-Chen ; Fan, Tai-Ching ; Hsiung, Gao-Yu ; Hsu, Kuo-Tung ; Hsu, Shen-Nung ; Huang, Ming-Hsiung ; Kuo, Chin-Cheng ; Lin, Fu-Yuan
Affiliation	(NSRRC, Hsinchu)
Publication	2005
In:	21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.2218
Subject category	Accelerators and Storage Rings
Abstract	Two superconducting magnets, one wavelength shifter (SWLS) with a field of 5 T and one wiggler (SW6) with a field of 3.2 T, were constructed and routinely operated at NSRRC for generating synchrotron x-rays. In addition, three multipole wigglers (IASW) with fields of 3.1 T will be constructed and installed each in the three achromatic short straight sections. A warm beam duct of 20 mm inner gap and a 1.5 W GM type cryo-cooler were chosen for the SWLS to achieve cryogen-free operation. For the SW6, a cold beam duct of 11 mm inner gap was kept at 100 K temperature and no trim coil compensation is necessary for its operation. Meanwhile, no beam loss was observed when the SW6 was quenched. A cryogenic plant with cooling power of 450 W was constructed to supply the liquid helium for the four superconducting wigglers. The design concept, magnetic field quality, the commissioning results, and the operation performance of these magnets will be presented.