Effects of an axial static magnetic field on laser wake field excitation and subsequent electron acceleration in a plasma

2018 ◽  
Author(s):  
Sweta Baliyan ◽  
Vivek Sajal ◽  
M. Rafat ◽  
Nafis Ahmed
Keyword(s):  
Magnetic Field ◽  
Static Magnetic Field ◽  
Electron Acceleration ◽  
Wake Field ◽  
Field Excitation ◽  
Axial Static Magnetic Field

scholarly journals Plasma wake-field excitation by relativistic electron bunches and charged particle acceleration in the presence of external magnetic field

2001 ◽  
Vol 19 (4) ◽  
pp. 597-604 ◽  
Author(s):  
V.A. BALAKIREV ◽  
V.I. KARAS' ◽  
I.V. KARAS' ◽  
V.D. LEVCHENKO
Keyword(s):  
Magnetic Field ◽  
Relativistic Electron ◽  
Magnetoactive Plasma ◽  
High Amplitude ◽  
Plasma Dynamics ◽  
Wake Field ◽  
Electron Bunches ◽  
Plasma Bunch ◽  
Field Excitation ◽  
Wake Fields

High-amplitude plasma wake waves are excited by high-density relativistic electron bunches (REB) moving in a plasma. The wake-fields can be used to accelerate charged particles, to serve as electrostatic wigglers in plasma free-electron lasers (FEL), and also can find many other applications. The electromagnetic fields in the region occupied by the bunch control the dynamics of the bunch itself. This paper presents the results of 2.5-dimensional numerical simulation of the modulation of a long REB in a plasma, the excitation of wake-fields by bunches in a plasma, in particular, in magnetoactive plasma. The previous one-dimensional study has shown that the density-profile modulation of a long bunch moving in plasma results in the growth of the coherent wake-wave amplitude. The bunch modulation occurs at the plasma frequency. The present study is concerned with the REB motion, taking into account the plasma and REB nonlinearities. It is demonstrated that the nonlinear REB/plasma dynamics exerts primary effect on both the REB self-modulation and the wake-field excitation by the bunches formed. We have demonstrated that a multiple excess of the accelerated bunch energy εmax over the energy of the exciting REB is possible in a magnetoactive plasma for a certain relationship between the parameters of the “plasma–bunch–magnetic field” system (owing to a hybrid volume–surface character of REB-excited wake-fields).

scholarly journals Grain Refinement During Directionally Solidifying GCr18Mo Steel at Low Pulling Speeds Under an Axial Static Magnetic Field

2017 ◽  
Vol 31 (7) ◽  
pp. 681-691 ◽  
Author(s):  
Yuan Hou ◽  
Zhen-Qiang Zhang ◽  
Wei-Dong Xuan ◽  
Jiang Wang ◽  
Jian-Bo Yu ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Grain Refinement ◽  
Static Magnetic Field ◽  
Axial Static Magnetic Field

scholarly journals Electron acceleration by surface plasma waves in the presence of static magnetic field

2015 ◽  
Vol 33 (1) ◽  
pp. 109-115 ◽  
Author(s):  
Prashant Chauhan ◽  
Deepika Anshu Varshney ◽  
Vivek Sajal
Keyword(s):  
Magnetic Field ◽  
Electron Beam ◽  
Static Magnetic Field ◽  
Electron Acceleration ◽  
Resonant Interaction ◽  
Zero Magnetic Field ◽  
Surface Plasma ◽  
Amplitude Maximum ◽  
Surface Plasma Waves ◽  
Metal Sheets

AbstractElectron acceleration is studied during the resonant interaction of launched electron beam with the surface plasma wave (SPW) in the presence of static magnetic field. A configuration of two parallel metal sheets separated by a vacuum region supports the SPW of amplitude maximum on the two parallel interfaces and minimum in the middle. Kretschmann geometry is used to excite surface plasma mode by shinning laser on a glass prism. Dispersion relation of SPW is established in the presence of magnetic field and smaller cut-off frequencies are observed as compared with that of without magnetic field. An electron beam launched in the middle region, experiences a longitudinal ponderomotive force due to SPWs and gets accelerated to the velocity of the order of phase velocity of the surface wave. The energy gained by electron is higher in the presence of magnetic field as compared with zero magnetic field. The electron energy and trajectory are also presented for varying parameters such as amplitude of SPW and magnetic field strength. In the present scheme, electron beams can achieve maximum 550 KeV energy for the SPW amplitude ESP = 1.2 × 1011 V/m, plasma frequency ωp = 1.3 × 1016 rad/s, and cyclotron frequency ωc/ωp = 0.05.

Sign in / Sign up

Export Citation Format

Share Document