Using Two-Dimensional Distributed Feedback for Synchronization of Radiation from Two Parallel-Sheet Electron Beams in a Free-Electron Maser.
A spatially extended planar 75 GHz free-electron maser with a hybrid two-mirror resonator consisting of two-dimensional upstream and traditional one-dimensional downstream Bragg reflectors and driven by two parallel-sheet electron beams 0.8  MeV/1  kA has been elaborated. For the highly oversized interaction space (cross section 45×2.5 vacuum wavelengths), the two-dimensional distributed feedback allowed realization of stable narrow-band generation that includes synchronization of emission from both electron beams. As a result, spatially coherent radiation with the output power of 30-50 MW and a pulse duration of ∼100  ns was obtained in each channel.
Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090, Russia.|Novosibirsk State University, Novosibirsk 630090, Russia.
A V
AV
Arzhannikov
Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod 603950, Russia.
N S
NS
Ginzburg
Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090, Russia.|Novosibirsk State University, Novosibirsk 630090, Russia.
P V
PV
Kalinin
Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090, Russia.|Novosibirsk State University, Novosibirsk 630090, Russia.
S A
SA
Kuznetsov
Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod 603950, Russia.
A M
AM
Malkin
Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod 603950, Russia.
N Yu
NY
Peskov
Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod 603950, Russia.
A S
AS
Sergeev
Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090, Russia.|Novosibirsk State University, Novosibirsk 630090, Russia.
S L
SL
Sinitsky
Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090, Russia.
V D
VD
Stepanov
Novosibirsk State University, Novosibirsk 630090, Russia.|Karlsruhe Institute of Technology, IHM and IHE, Karlsruhe 76131, Germany.
M
M
Thumm
Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod 603950, Russia.
V Yu
VY
Zaslavsky