Nonlinear mode competition and coherence in low gain FEL oscillators

Abstract

An array of silicon diodes with appropriate K-edge f i l t e r s was used to determine the high-energy (6 -500 keV) photon apectra of a high temperature tungsten pluma using a 4 . 6 W , 83 k V plasma flow switch. The detector array used 10 different f i l t e r material/thickneen coabinations. The observed x-ray emission had a duration of > 600 nanoseconds (FWM of