Plasma effects in a free electron laser

VK Tripathi, CS Liu - IEEE transactions on plasma science, 1990 - ieeexplore.ieee.org
The introduction of a plasma and a strong guide magnetic field in a free electron laser (FEL)
slows down the phase velocity of radiation, significantly reducing the requirements on beam …

High-gain free-electron-laser amplifier with warm plasma background: linear analysis

A Serbeto, MV Alves - IEEE transactions on plasma science, 1993 - ieeexplore.ieee.org
The linear free-electron laser (FEL) theory with plasma background is considered using the
hybrid model in contrast with the fluid model to describe the FEL interaction with plasma …

A whistler‐pumped free electron laser

A Sharma, VK Tripathi - The Physics of fluids, 1988 - pubs.aip.org
A relativistic electron beam in the presence of a whistler wave excites a negative‐energy
beam space charge mode and a high frequency laser radiation (ω 1≫ ω c). The instability is …

Kinetic theory of a whistler‐pumped free electron laser

A Sharma, VK Tripathi - Physics of Fluids B: Plasma Physics, 1993 - pubs.aip.org
A kinetic formalism of mode coupling in a whistler‐pumped free electron laser (FEL) is
developed. The analysis includes the effect of finite space charge field of the electron beam …

Explosive free-electron-laser instability with an electromagnetic wiggler

VK Tripathi, CS Liu - Physics Letters A, 1988 - Elsevier
A new scheme for generating free electron laser via explosive instabilities with
electromagnetic wave wiggler is proposed. This is achieved when a slow electromagnetic …

Stimulated Brillouin scattering of a laser beam in a plasma channel

RN Agarwal, VK Tripathi… - IEEE transactions on …, 1996 - ieeexplore.ieee.org
A high-power laser propagating through a plasma creates a low density channel through
which it propagates self guided. This equilibrium, however, is unstable to Brillouin …

Effect of beam pre-bunching on gain and efficiency in a surface wave-pumped free electron laser

SC Sharma, J Sharma, A Bhasin… - Journal of Plasma Physics, 2012 - cambridge.org
A pre-bunched relativistic electron beam (REB) counter-propagating to the surface wave in
the vacuum region Compton backscatters the surface wave into a high-frequency coherent …

Upper hybrid wave pumped free electron laser

SC Sharma, VK Tripathi - IEEE transactions on plasma science, 1995 - ieeexplore.ieee.org
A large amplitude upper hybrid wave has potential to be employed as a wiggler for the
generation of high frequency coherent radiation via free electron laser (EEL) instability. At a …

Nonlocal theory of a whistler pumped free electron laser

KK Pant, VK Tripathi - Physics of plasmas, 1994 - pubs.aip.org
A cylindrical waveguide loaded with a magnetized plasma supports a short wave'Ieiigth
whistler mode. In the presence of a relativistic electron beam the whistler mode couples to a …

Short wavelength free electron laser operation in a periodic dielectric

CS Liu, VK Tripathi - IEEE transactions on plasma science, 1995 - ieeexplore.ieee.org
A layered dielectric with periodic permittivity profile,/spl epsiv/=/spl epsiv//sub 0/+/spl
epsiv//sub 2/cos (k/sub 0x/x+ k/sub 0z/z), is suitable for the generation of coherent radiation …