نتایج جستجو برای: relativistic electron beam

تعداد نتایج: 428847  

2014
Ronald C. Davidson

The free electron laser instability is investigated theoretically for a tenuous relativistic electron beam propagating parallel to a longitudinal wiggler field (Bo + 6Bainkoz)%. The stability analysis is based on the linearized Vlasov-Maxwell equations for perturbations about the beam equilibrium f4 = (nb/2w5)6(p_-mV)6(p,-mmV). For (W D/b)(eB/BO) of order unity or larger, it is found that the t...

1998
R. Govil S. J. Wheeler W. P. Leemans Ernest Orlando

A comprehensive experimental study of focusing of relativistic electron beams with overdense and underdense plasma lenses is being conducted at the Beam Test Facility at LBNL [1]. Short (15ps rms) electron bunches, from the 50 MeV LBNL Advanced Light Source injector are transported through laser produced plasmas. The electron beam spot size and divergence at the plasma lens is adjusted using qu...

2014
Erik Hemsing Gennady Stupakov Dao Xiang Alexander Zholents

Accelerator-based light sources such as storage rings and free-electron lasers use relativistic electron beams to produce intense radiation over a wide spectral range for fundamental research in physics, chemistry, materials science, biology, and medicine. More than a dozen such sources operate worldwide, and new sources are being built to deliver radiation that meets with the everincreasing so...

2012
M. Chitsazi B. Maraghechi M. H. Rouhani

Three-dimensional simulation of harmonic up generation in free electron laser amplifier operating simultaneously with a cold and relativistic electron beam is presented in steady-state regime where the slippage of the electromagnetic wave with respect to the electron beam is ignored. By using slowly varying envelope approximation and applying the source-dependent expansion to wave equations, el...

2008
A. Murokh R. Agustsson S. Boucher P. Frigola Marina Del Rey

An X-band Traveling wave Deflector mode cavity (XTD) has been developed at Radiabeam Technologies to perform longitudinal characterization of the subpicosecond ultra-relativistic electron beams. The device is optimized for the 100 MeV electron beam parameters at the Accelerator Test Facility (ATF) at Brookhaven National Laboratory, and is scalable to higher energies. An XTD is designed to opera...

Journal: :Physical review letters 2014
N Vafaei-Najafabadi K A Marsh C E Clayton W An W B Mori C Joshi W Lu E Adli S Corde M Litos S Li S Gessner J Frederico A S Fisher Z Wu D Walz R J England J P Delahaye C I Clarke M J Hogan P Muggli

We show through experiments and supporting simulations that propagation of a highly relativistic and dense electron bunch through a plasma can lead to distributed injection of electrons, which depletes the accelerating field, i.e., beam loads the wake. The source of the injected electrons is ionization of the second electron of rubidium (Rb II) within the wake. This injection of excess charge i...

2007
K. T. Cheng M. H. Chen W. R. Johnson J. Sapirstein

High-precision relativistic atomic structure calculations based on the relativistic many-body perturbation theory and the relativistic configuration-interaction method are shown to provide stringent tests of strong-field quantum electrodynamic (QED) corrections when compared with electron beam ion trap measurements of the spectra of highly-charged, manyelectron ions. It is further shown that th...

2007
M. Lontano

Original quasineutrality of a plasma at rest is heavily perturbed when the electrons are induced to oscillate relativistically by a superintense laser beam. This represents one of the major difficulties when studying the propagation of intense linearly polarized electromagnetic waves in plasmas. Particular attention has to be dedicated to the effective relativistic increase of the critical dens...

2015
C. P. Welsch

The Laser Applications at Accelerators Network (LA3NET) is receiving funding of up to 4.6 M€ from the European Union within the 7 Framework Program to carry out R&D into laser-based particle sources, laser acceleration schemes and laser-based beam diagnostics. This international network joins universities, research centers and private companies and has been training 19 early stage researchers a...

2014
S. C.

A self-consistent theory of the free electron laser instability is developed for a hollow electron beam propagating through an undulator (multiple mirror) magnetic field. The stability analysis is carried out within the framework of the linearized Vlasov-Maxwell equations. It is assumed that the beam is thin, with radial thickness much smaller than the mean beam radius, and that v/yb << 1, wher...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید