Title :
Short multipole magnet designs for JLab FEL upgrade
Author :
Smirnov, A. ; Newsham, D. ; Luo, Y. ; Yu, D. ; Biallas, G. ; Wines, R.
Author_Institution :
DULY Res. Inc., Rancho Palos Verdes, CA, USA
Abstract :
Novel designs for octupole and sextupole magnet families for the JLab 10 kW IR FEL upgrade were developed and characterized. The designs were made with 3D simulations, and provided very short effective length that nearly equals the aperture radius, along with 1% accuracy of the field integral over 70% of a large aperture. The main feature is shaping of the cylindrical pole tips to provide high field quality dominated by fringe fields. Other features include magnetically isolated field clamps, usage of non-tapered coils of standard racetrack shape, and non-linear saturation effects (for sextupole magnets).
Keywords :
accelerator magnets; electromagnets; free electron lasers; particle beam dynamics; 10 kW; 3D simulations; JLab IR FEL upgrade; aperture radius; cylindrical pole tips; field integral; fringe fields; magnetically isolated field clamps; nonlinear saturation effects; octupole magnet; sextupole magnet; short multipole magnet designs; standard racetrack shape; Apertures; Clamps; Coils; Lattices; Magnetic flux; Magnetic flux leakage; Optical beams; Saturation magnetization; Shape; Structural beams;
Conference_Titel :
Particle Accelerator Conference, 2003. PAC 2003. Proceedings of the
Print_ISBN :
0-7803-7738-9
DOI :
10.1109/PAC.2003.1288808
