TY - JOUR
T1 - Free-electron laser with a strong axial magnetic field
AU - Friedland, L.
AU - Hirshfield, J. L.
PY - 1980
Y1 - 1980
N2 - A small-signal theory is given for gain in a free-electron laser comprising a cold relativistic electron beam in a helical periodic transverse, and a strong uniform axial, magnetic field. Exact finite-amplitude, steady-state helical orbits are included. If perturbed, these orbits oscillate about equilibrium, so that substantial gain enhancement can occur if the electromagnetic perturbations resonate with these oscillations. This gain enhancement need not be at the cost of frequency upshift.
AB - A small-signal theory is given for gain in a free-electron laser comprising a cold relativistic electron beam in a helical periodic transverse, and a strong uniform axial, magnetic field. Exact finite-amplitude, steady-state helical orbits are included. If perturbed, these orbits oscillate about equilibrium, so that substantial gain enhancement can occur if the electromagnetic perturbations resonate with these oscillations. This gain enhancement need not be at the cost of frequency upshift.
UR - http://www.scopus.com/inward/record.url?scp=5344228505&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.44.1456
DO - 10.1103/PhysRevLett.44.1456
M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???
AN - SCOPUS:5344228505
SN - 0031-9007
VL - 44
SP - 1456
EP - 1460
JO - Physical Review Letters
JF - Physical Review Letters
IS - 22
ER -