Title :
Design and construction performance of a compact cryogen-free superconducting wavelength shifter
Author :
Hwang, C.S. ; Wang, B. ; Wahrer, R. ; Chen, H.H. ; Chang, C.H. ; Lin, F.Y. ; Fan, T.C. ; Chen, C.T.
Author_Institution :
Synchtron Radiat. Res. Center, Hsinchu, Taiwan
fDate :
3/1/2002 12:00:00 AM
Abstract :
A compact cryogen-free superconducting wavelength shifter with a warm bore for electron beam has been constructed for generating synchrotron radiation hard X-rays. This magnet consists of three pairs of racetrack NbTi superconducting coils that can produce a maximum magnetic field of 6.0 Tesla at the central pole. The superconducting coils, the aluminum supporting block, and the return iron yokes are cooled to 4 K, and the thermal shielding and HTS current leads to 60 K, by using a 1.5 W Gifford-McMahon type cryocooler. The technical issues on the magnet design and the construction process are presented. Several different measurement systems are used to characterize the magnetic field performance.
Keywords :
X-ray production; high-temperature superconductors; magnetic fields; niobium alloys; superconducting cables; superconducting coils; superconducting magnets; titanium alloys; 1.5 W; 4 K; 6.0 T; 60 K; Gifford-McMahon type cryocooler; HTS current leads; NbTi; aluminum supporting block; compact cryogen-free superconducting wavelength shifter; construction process; electron beam; magnet design; magnetic field; measurement systems; racetrack NbTi superconducting coils; return iron yokes; synchrotron radiation hard X-rays generation; technical issues; thermal shielding; warm bore; Boring; Electron beams; Magnetic field measurement; Magnetic shielding; Niobium compounds; Superconducting coils; Superconducting magnets; Synchrotron radiation; Titanium compounds; X-rays;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2002.1018494
