Title :
MIT microwiggler for free electron laser applications
Author :
Catravas, P. ; Stoner, R. ; Blastos, J. ; Sisson, D. ; Mastovsky, I. ; Bekefi, G. ; Wang, X.-J. ; Fisher, A.
Author_Institution :
MIT, Cambridge, MA, USA
Abstract :
A microwiggler-based FEL permits operation at shorter wavelengths with a reduction in the size and cost of the device. The MIT microwiggler is a pulsed ferromagnetic-core electromagnet with 70 periods of 8.8 mm each which generates an on-axis peak magnetic field of 4.2 kG. The pulse repetition rate is 0.5 Hz with FWHM 0.5 msec. The microwiggler is characterized by extensive tunability. We employed a novel tuning regimen through which the rms spread in peak amplitudes was reduced to 0.08%, the lowest ever achieved in a sub-cm period magnetic field, The microwiggler is a serviceable scientific apparatus: spontaneous emission has been observed for wavelengths of 700-800 nm using a 40 MeV beam from the Accelerator Test Facility LINAC at BNL
Keywords :
electromagnets; free electron lasers; spontaneous emission; wigglers; 0.5 Hz; 4.2 kG; 700 to 800 nm; 8.8 mm; Accelerator Test Facility LINAC; MIT microwiggler; extensive tunability; free electron laser applications; pulse repetition rate; pulsed ferromagnetic-core electromagnet; spontaneous emission; Costs; Electromagnets; Free electron lasers; Laser applications; Laser tuning; Life estimation; Magnetic fields; Optical pulse generation; Particle beams; Spontaneous emission;
Conference_Titel :
Particle Accelerator Conference, 1995., Proceedings of the 1995
Print_ISBN :
0-7803-2934-1
DOI :
10.1109/PAC.1995.504606
