Effect of electron-beam pulse length on microwave efficiency of coaxial vircator

2002 ◽  
Author(s):  
W. Jiaig ◽  
K. Woolverton ◽  
J. Dickens ◽  
M. Kristiansen
Keyword(s):  
Electron Beam ◽  
Pulse Length ◽  
Electron Beam Pulse

scholarly journals Supershort avalanche electron beam generation in gases

2008 ◽  
Vol 26 (4) ◽  
pp. 605-617 ◽  
Author(s):  
V.F. Tarasenko ◽  
E.H. Baksht ◽  
A.G. Burachenko ◽  
I.D. Kostyrya ◽  
M.I. Lomaev ◽  
...  
Keyword(s):  
High Pressure ◽  
Electron Beam ◽  
Atmospheric Pressure ◽  
Electron Beams ◽  
Solid Angle ◽  
Generation Mechanism ◽  
Full Width ◽  
Half Maximum ◽  
Electron Beam Pulse ◽  
Supershort Avalanche Electron Beam

AbstractThis paper reports on the properties of a supershort avalanche electron beam generated in the air or other gases under atmospheric pressure and gives the analysis of a generation mechanism of supershort avalanche electron beam, as well as methods of such electron beams registration. It is reported that in the air under the pressure of 1 atm, a supershort (<100 ps) avalanche electron beam is formed in the solid angle more than 2π steradian. The electron beam has been obtained behind a 45 µm thick Al-Be foil in SF6 and Xe under the pressure of 2 atm, and in He, under the pressure of about 15 atm. It is shown that in SF6 under the high pressure (>1 atm) duration (full width at half maximum) of supershort avalanche electron beam pulse is about 150 ps.

Evolution of an electron beam pulse influenced by coulomb collision effects in the solar corona

2020 ◽  
Vol 65 (3) ◽  
pp. 1062-1069
Author(s):  
G.A. Casillas-Pérez ◽  
S. Jeyakumar ◽  
A. Carrillo-Vargas ◽  
H.R. Pérez-Enríquez
Keyword(s):  
Electron Beam ◽  
Solar Corona ◽  
Coulomb Collision ◽  
Electron Beam Pulse

scholarly journals Observation of the tungsten surface damage under ITER-relevant transient heat loads during and after electron beam pulse

2016 ◽  
Author(s):  
A. A. Vasilyev ◽  
A. S. Arakcheev ◽  
I. A. Bataev ◽  
V. A. Bataev ◽  
A. V. Burdakov ◽  
...  
Keyword(s):  
Electron Beam ◽  
Surface Damage ◽  
Electron Beam Pulse ◽  
Tungsten Surface ◽  
Heat Loads

Shock wave focusing by curved walls and staging of beam induced thermonuclear microexplosions

1976 ◽  
Vol 16 (1) ◽  
pp. 81-94 ◽  
Author(s):  
F. Winterberg
Keyword(s):  
Shock Wave ◽  
Electron Beam ◽  
Relativistic Electron ◽  
Relativistic Electron Beam ◽  
Solid Wall ◽  
Pulse Length ◽  
Atomic Weight ◽  
Wall Material ◽  
Original Proposal ◽  
Concave Wall

Because of the technical difficulties associated with the production of ultrashort beam pulses, the efforts to release energy from thermonuclear microexplosions are mainly directed at present towards confinement in a high-Z material solid wall, as in the original proposal by the author for relativistic electron beam induced fusion. The most common approach today is by the implosion of a solid high-Z material shell, for example, with an intense relativistic electron beam. We will show that better utilization of the beam energy may be possible with beam bombardment of a curved concave wall, setting off a shock wave which can be focused precisely onto the thermonuclear target. In addition, by a proper variation of the atomic weight and density in the layer of the wall material to be ablated by the energy deposition of the beam, the pulse length of the shock wave can be made substantially shorter than the pulse length of the beam.

A Study of Electrically Active Defects Induced by Pulsed Electron Beam Annealing In (100) N-Type Virgin Silicon

1984 ◽  
Vol 35 ◽  
Author(s):  
M.S. Doghmane ◽  
D. Barbier ◽  
A. Laugier
Keyword(s):  
Surface Layer ◽  
Electron Beam ◽  
Layer Thickness ◽  
Schottky Contacts ◽  
Probable Mechanism ◽  
Electron Trap ◽  
Melting Layer ◽  
Pulsed Electron Beam ◽  
Depth Profiles ◽  
Electron Beam Pulse

ABSTRACTAu/Si Schottky contacts have been used as test structures to investigate defects induced in virgin C.Z (100) N-type silicon after irradiation with a 12 to 20 KeV mean energy electron beam pulse. A thin and highly damaged surface layer was observed from a fluence threshold of 1 J/cm2. In addition electron traps were detected in the PEBA induced melting layer with concentrations in the 1012-1013 cm-3 range. Their depth profiles have been related to the PEBA induced melting layer thickness. Quenching of multidefect complexes is the most probable mechanism for electron trap generation in the processed layer.

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