TITLE

Micron-scale width multislot plasma cathode

AUTHOR(S)
Yarmolich, D.; Vekselman, V.; Gurovich, V. Tz.; Gleizer, J. Z.; Felsteiner, J.; Krasik, Ya. E.
PUB. DATE
December 2008
SOURCE
Physics of Plasmas;Dec2008, Vol. 15 Issue 12, p123507
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
High-current electron beam (∼1.5 kA, ∼30 A/cm2, ∼200 keV, ∼300 ns) generation in a diode with a micron-scale width multislot cathode is reported. The cathode operation is based on plasma formation inside slots formed by a stack of glass plates interlaid with 25 μm Cu foils. It was shown that the plasma formation is initiated at the beginning of the accelerating pulse with electric field ≤104 V/cm. The plasma density and temperature were found to be ∼1015 cm3 and ∼7 eV inside the slots and ∼1014 cm-3 and ∼7 eV at the vicinity of the slots output. The dependence of the plasma parameters inside the slots upon the slot’s width as well as the control of the extracted electron beam parameters by varying the slot’s width and the distance between slots have been studied.
ACCESSION #
35982558

 

Related Articles

  • One-dimensional simulations of reversed field pinch discharges. Martines, E.; Spagnolo, S. // Physics of Plasmas;Dec2008, Vol. 15 Issue 12, p122506 

    A simple one-dimensional time-dependent model for simulating the magnetic field profiles in a reversed field pinch (RFP) plasma is presented. The model, which is derived from basic MHD equations with the addition of a phenomenological dynamo electric field, is able, through the tuning of a few...

  • Laser assisted heating of extreme ultraviolet-emitting z-pinch plasmas. Wieneke, Stephan; Brückner, Stephan; Viöl, Wolfgang // Physics of Plasmas;Dec2008, Vol. 15 Issue 12, p122508 

    A low-current and low-compression z-pinch nitrogen plasma is heated up by means of a short laser pulse. Spectra are taken in the extreme ultraviolet spectral range from 11 to 18 nm to estimate the heating effect. Without additional laser heating the initial plasma conditions are ne≈1017...

  • Intense laser-driven relativistic electron beams in a two-layer target. Zhou, C. T.; He, X. T. // Physics of Plasmas;Dec2008, Vol. 15 Issue 12, p123105 

    An intense short-pulse laser irradiates solid targets to produce relativistic electrons by depositing the light energy at the relativistic critical density. These fast electrons propagating through a coaxial two-layer plasma target can generate tens of million-Gauss interface magnetic fields at...

  • The role of parallel heat transport in the relation between upstream scrape-off layer widths and target heat flux width in H-mode plasmas of the National Spherical Torus Experiment. Ahn, J.-W.; Boedo, J. A.; Maingi, R.; Soukhanovskii, V. // Physics of Plasmas;Dec2008, Vol. 15 Issue 12, p122507 

    The physics of parallel heat transport was tested in the scrape-off layer (SOL) plasma of the National Spherical Torus Experiment [M. Ono et al., Nucl. Fusion 40, 557 (2000); S. M. Kaye et al., ibid. 45, S168 (2005)] tokamak by comparing the upstream electron temperature (Te) and density (ne)...

  • Localization of Magnetized Electrons in Current Filaments as a Fundamental Cause of Coulomb Explosion. Gordeev, A. V.; Losseva, T. V. // Plasma Physics Reports;Jan2005, Vol. 31 Issue 1, p26 

    Mechanisms for generating current filaments in a dense plasma under the action of focused laser pulses and in a Z-pinch configuration are discussed. The main properties of current filaments with a zero and nonzero electron vorticity Ωe = B – (c/e)∇×pe that originate at...

  • Three-dimensional current systems generated by plasmas colliding in a background magnetoplasma. Gekelman, W.; Collette, A.; Vincena, S. // Physics of Plasmas;Jun2007, Vol. 14 Issue 6, p062109 

    Results are presented from an experiment in which two plasmas, initially far denser than a background magnetoplasma, collide as they move across the magnetic field. The dense plasmas are formed when laser beams, nearly orthogonal to the background magnetic field, strike two targets. The merging...

  • Formation of nonquasineutral vortex plasma structures with a zero net current. Gordeev, A. // Plasma Physics Reports;Nov2006, Vol. 32 Issue 11, p921 

    A nonquasineutral vortex structure with a zero net current is described that arises as a result of electron drift in crossed magnetic and electric fields, the latter being produced by charge separation on a spatial scale of about the magnetic Debye radius r B = | B|/(4Ï€ en e ). In such a...

  • Comment on “Signatures of the Unruh effect via high-power, short-pulse lasers”. Tikhonchuk, Vladimir; Pegoraro, Francesco // European Physical Journal D -- Atoms, Molecules, Clusters & Opti;Mar2010, Vol. 55 Issue 2, p391 

    The article comments on a research paper which discusses the possibilities for experimental detection of the Unruh effect in the laboratory and its close relation with the development of ultra-high intensity laser plasma interaction. It comments on the role of the Unruh and Hawking effects in...

  • Time-resolved photocurrent spectroscopy of the evolution of the electric field in optically excited superlattices and the prospects for Bloch gain. Lisauskas, Alvydas; Blöser, Claudia; Sachs, Robert; Roskos, Hartmut G.; Juozapavičius, Aušrius; Valušis, Gintaras; Köhler, Klaus // Applied Physics Letters;3/7/2005, Vol. 86 Issue 10, p102103 

    We report on photocurrent spectroscopy on undoped GaAs/AlGaAs semiconductor superlattices subjected to femtosecond optical excitation. The evolution of the carrier-drift-induced inhomogeneity of the electric field is studied by tracing the shifting and broadening of Wannier–Stark...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics