TY - JOUR
T1 - Mode competition and control in free electron lasers with one and two dimensional Bragg resonators
AU - Ginzburg, N.S.
AU - Sergeev, A.S.
AU - Peskov, N. Yu
AU - Konoplev, I.V.
AU - Robb, G.R.M.
AU - Phelps, A.D.R.
PY - 1996/6/11
Y1 - 1996/6/11
N2 - We present a time domain analysis of the transverse mode dynamics which occur in FEL oscillators using oversize microwave cavities. It is shown that both traditional one-dimensional and novel two-dimensional Bragg cavities can produce radiation at a single frequency with a one-mode azimuthal distribution, which corresponds to spatial synchronization of the electromagnetic radiation. In one-dimensional system, electronic mode selection occurs via nonlinear mode competition. In contrast, electrodynamic mode selection occurs in two-dimensional Bragg cavities, resulting in the production of a single azimuthally-symmetric mode after the linear stage of evolution. The two-dimensional Bragg cavity is shown to retain its selectivity when its radius greatly exceeds the radiation wavelength.
AB - We present a time domain analysis of the transverse mode dynamics which occur in FEL oscillators using oversize microwave cavities. It is shown that both traditional one-dimensional and novel two-dimensional Bragg cavities can produce radiation at a single frequency with a one-mode azimuthal distribution, which corresponds to spatial synchronization of the electromagnetic radiation. In one-dimensional system, electronic mode selection occurs via nonlinear mode competition. In contrast, electrodynamic mode selection occurs in two-dimensional Bragg cavities, resulting in the production of a single azimuthally-symmetric mode after the linear stage of evolution. The two-dimensional Bragg cavity is shown to retain its selectivity when its radius greatly exceeds the radiation wavelength.
KW - transverse mode dynamics
KW - free electron lasers
KW - Bragg resonators
U2 - 10.1016/0168-9002(95)01204-4
DO - 10.1016/0168-9002(95)01204-4
M3 - Article
AN - SCOPUS:0030165088
SN - 0168-9002
VL - 375
SP - 202
EP - 206
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
IS - 1-3
ER -