Title :
A 70-period high-precision microwiggler for free electron lasers
Author :
Stoner, R. ; Bekefi, G.
Author_Institution :
Dept. of Phys., MIT, Cambridge, MA, USA
fDate :
6/1/1995 12:00:00 AM
Abstract :
We have designed, constructed, and operated a 70-period microwiggler for free electrons lasers (FEL´s). The device is a pulsed ferromagnetic-core electromagnet with a period of 8.8 mm, which generates an on-axis peak magnetic field of 4.2 kG. The pulses, of 0.5 ms duration, are generated at a rate of 0.5 Hz. Each field peak is independently tunable. We employed a novel tuning regimen to reduce the RMS spread in the peak amplitudes to 0.12%, the lowest value thus far attained in a sub-cm-period periodic magnetic field
Keywords :
electromagnets; errors; free electron lasers; laser accessories; laser tuning; optical design techniques; wigglers; 0.5 ms; 4.2 kG; 70-period high-precision microwiggler; FEL; RMS spread; free electron lasers; independently tunable; on-axis peak magnetic field; peak amplitudes; pulsed ferromagnetic-core electromagnet; sub-cm-period periodic magnetic field; tuning regimen; Electromagnets; Electron beams; Free electron lasers; Laser tuning; Magnetic cores; Magnetic fields; Optical pulse generation; Superconducting magnets; Testing; Undulators;
Journal_Title :
Quantum Electronics, IEEE Journal of
