Axisymmetric instabilities of fast electron beams in dense plasmas

2008 ◽  
Vol 15 (4) ◽  
pp. 042701 ◽  
Author(s):  
Shafiq-ur-Rehman ◽  
Xiaogang Wang ◽  
Yue Liu
Keyword(s):  
Fast Electron ◽  
Electron Beams ◽  
Dense Plasmas

A Numerical Fluid Analysis for Early Nonlinear Mode Evolution of Fast Electron Beams in Dense Plasmas

2009 ◽  
Vol 11 (6) ◽  
pp. 661-665 ◽  
Author(s):  
S Rehman ◽  
Wang Xiaogang ◽  
Liu Jian ◽  
Lei Yian ◽  
Liu Yue
Keyword(s):  
Fast Electron ◽  
Electron Beams ◽  
Dense Plasmas ◽  
Fluid Analysis ◽  
Nonlinear Mode

PLASMA WAKES DRIVEN BY NEUTRINOS, PHOTONS AND ELECTRON BEAMS

2007 ◽  
Vol 21 (03n04) ◽  
pp. 343-350
Author(s):  
R. BINGHAM ◽  
L. O. SILVA ◽  
J. T. MENDONCA ◽  
P. K. SHUKLA ◽  
W. B. MORI ◽  
...  
Keyword(s):  
Single Particle ◽  
Electron Beams ◽  
Kinetic Equations ◽  
Particle Interactions ◽  
Photon Beams ◽  
Dense Plasmas ◽  
New Class ◽  
Collective Plasma ◽  
Collective Interactions ◽  
Electron And Photon

There is considerable interest in the propagation dynamics of intense electron and photon neutrino beams in a background dispersive medium such as dense plasmas, particularly in the search for a mechanism to explain the dynamics of type II supernovae. Neutrino interactions with matter are usually considered as single particle interactions. All the single particle mechanisms describing the dynamical properties of neutrino's in matter are analogous with the processes involving single electron interactions with a medium such as Compton scattering, and Cerenkov radiation etc. However, it is well known that beams of electrons moving through a plasma give rise to a new class of processes known as collective interactions such as two stream instabilities which result in either the absorption or generation of plasma waves. Intense photon beams also drive collective interactions such as modulational type instabilities. In both cases relativistic electron beams of electrons and photon beams can drive plasma wakefields in plasmas. Employing the relativistic kinetic equations for neutrinos interacting with dense plasmas via the weak force we explore collective plasma streaming instabilities driven by Neutrino electron and photon beams and demonstrate that all three types of particles can drive wakefields.

Experiments on Radiation by Fast Electron Beams

1953 ◽  
Vol 24 (7) ◽  
pp. 826-833 ◽  
Author(s):  
H. Motz ◽  
W. Thon ◽  
R. N. Whitehurst
Keyword(s):  
Fast Electron ◽  
Electron Beams

scholarly journals Fast electron beam with manageable spotsize from laser interaction with the tailored cone-nanolayer target

2012 ◽  
Vol 30 (4) ◽  
pp. 553-558 ◽  
Author(s):  
Huan Wang ◽  
Lihua Cao ◽  
Zongqing Zhao ◽  
M.Y. Yu ◽  
Yuqiu Gu ◽  
...  
Keyword(s):  
Electron Beam ◽  
Fast Electron ◽  
Electron Beams ◽  
Two Dimensional ◽  
Laser Interaction ◽  
Hollow Cone ◽  
Long Distance ◽  
Particle In Cell ◽  
Fast Electron Beam

AbstractAn advanced cone-nanolayer target with nanolayers on both inside and outside of the hollow-cone tip is proposed. Two-dimensional particle-in-cell simulations show that laser interaction with such cone-nanolayer targets can efficiently produce fast electron beams with manageable spotsize, and the beams can propagate for a relatively long distance in the vacuum beyond the cone tip.

scholarly journals Measurements of fast electron beams and soft X-ray emission from plasma-focus experiments

Nukleonika ◽  
2016 ◽  
Vol 61 (2) ◽  
pp. 161-167 ◽  
Author(s):  
Władysław Surała ◽  
Marek J. Sadowski ◽  
Roch Kwiatkowski ◽  
Lech Jakubowski ◽  
Jarosław Żebrowski
Keyword(s):  
Plasma Focus ◽  
Fast Electron ◽  
Hot Spots ◽  
Electron Beams ◽  
Experimental Studies ◽  
Neutron Counter ◽  
X Rays ◽  
Strong Electron ◽  
Time Resolved ◽  
X Ray

Abstract The paper reports results of the recent experimental studies of pulsed electron beams and soft X-rays in plasma-focus (PF) experiments carried out within a modified PF-360U facility at the NCBJ, Poland. Particular attention was focused on time-resolved measurements of the fast electron beams by means of two different magnetic analyzers, which could record electrons of energy ranging from about 41 keV to about 715 keV in several (6 or 8) measuring channels. For discharges performed with the pure deuterium filling, many strong electron signals were recorded in all the measuring channels. Those signals were well correlated with the first hard X-ray pulse detected by an external scintillation neutron-counter. In some of the analyzer channels, electron spikes (lasting about dozens of nanoseconds) and appearing in different instants after the current peculiarity (so-called current dip) were also recorded. For several discharges, fast ion beams, which were emitted along the z-axis and recorded with nuclear track detectors, were also investigated. Those measurements confirmed a multibeam character of the ion emission. The time-integrated soft X-ray images, which were taken side-on by means of a pinhole camera and sensitive X-ray films, showed the appearance of some filamentary structures and so-called hot spots. The application of small amounts of admixtures of different heavy noble gases, i.e. of argon (4.8% volumetric), krypton (1.6% volumetric), or xenon (0.8% volumetric), decreased intensity of the recorded electron beams, but increased intensity of the soft X-ray emission and showed more distinct and numerous hot spots. The recorded electron spikes have been explained as signals produced by quasi-mono-energetic microbeams emitted from tiny sources (probably plasma diodes), which can be formed near the observed hot spots.

Resistive filamentation of laser-driven fast electron beams

2006 ◽  
Vol 133 ◽  
pp. 361-365 ◽  
Author(s):  
J. Honrubia ◽  
J. Meyer-ter-Vehn
Keyword(s):  
Fast Electron ◽  
Electron Beams
Sign in / Sign up

Export Citation Format

Share Document