TITLE

Peculiarities of electron emission from the cathode in an abnormal glow discharge

AUTHOR(S)
Bokhan, A. P.; Bokhan, P. A.; Zakrevsky, D. E.
PUB. DATE
April 2005
SOURCE
Applied Physics Letters;4/11/2005, Vol. 86 Issue 15, p151503
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Emissive properties of cold cathodes under the conditions of abnormal glow discharges are considered. Unlike the earlier made investigations, account is taken of alloying the surface layer by fast atoms generated in the cathode fall region. Atom implantation into the cathode to a depth of 10 nm changes the electron emission in a gas discharge radically as compared with vacuum conditions. Potential emission is reduced because of an increase in the surface work function. Kinetic emission is enhanced owing to an increase of the inelastic energy losses by fast atoms in the cathode material. Also greatly amplified is photoemission; moreover, its mechanism is changed.
ACCESSION #
17185433

 

Related Articles

  • Surface condition and electron emission from cold cathodes in vacuum and in noble gas glow discharge. Bokhan, P.; Zakrevsky, D. // Technical Physics;Jan2007, Vol. 52 Issue 1, p104 

    An optogalvanic method is used to measure photoemission coefficient γph in a gas discharge exposed to the resonant radiation of helium atoms. The range of working current j/P ( j is the current density, and P He is the gas pressure) extends from 2 to 1000 μA/(cm2 Torr), and field strength...

  • Role of the fast Ar atoms, Ar[sup +] ions, and metastable Ar atoms in a hollow cathode glow discharge: Study by a hybrid model. Baguer, N.; Bogaerts, A.; Gijbels, R. // Journal of Applied Physics;8/15/2003, Vol. 94 Issue 4, p2212 

    The role of the fast Ar atoms, Ar[SUP+] ions, and metastable Ar atoms in a cylindrical hollow cathode discharge (HCD) is studied based on a self-consistent model. The model comprises submodels based on the principle of Monte Carlo and fluid simulations. With Monte Carlo models the movement of...

  • Transients and efficient generation of electron beams in the pulsed wide-aperture glow discharge. Bel’skaya, E.; Bokhan, P.; Zakrevskii, Dm. // Technical Physics;Aug2008, Vol. 53 Issue 8, p1091 

    The quasi-continuous wide-aperture glow discharge in helium at pressures from 1.2 to 6.0 Torr is studied. It is found that electron beam generation efficiency η is higher than 96% in the pressure range 1.2–3.0 Torr at voltages from 1.0 to 2.6 kV. The maximum power was ≈ 0 kW at 6...

  • Atom-Bombardment-Induced Electron Emission from a Cathode in a Glow Discharge: Example of an Open Discharge. Sorokin, A. R. // Technical Physics Letters;Sep2003, Vol. 29 Issue 9, p701 

    An analysis of the glow discharge conditions shows that processes involved in this phenomenon should be described in terms of the electron emission coefficients γ determined in a technical (γ[sub t]) rather than in an ultrahigh vacuum. The results of calculations of the electron beam...

  • A theoretical approach to electric breakdown behaviour and effective secondary emission coefficient in gas discharge process between two parallel-plane disk electrodes. Noori, H.; Ranjbar, A. H. // Journal of Applied Physics;7/15/2012, Vol. 112 Issue 2, p023301 

    The gas discharge characteristics are seriously influenced by the effective secondary electron-emission coefficient (γeff) originally defined by Townsend. A theoretical approach has been proposed for the determination of variation of this coefficient as a function of the geometrical parameter...

  • Electron Beam Formation in an Open Discharge. Sorokin, A. R. // Technical Physics Letters;Dec2000, Vol. 26 Issue 12, p1114 

    The results of calculations reported for the first time indicate that the electron emission from a cathode, which is necessary to explain the main properties of an open discharge, is stimulated by the cathode bombardment by fast atoms rather than by photons (as was believed for a long time). The...

  • Modeling of switching delay in gas-insulated trigatron spark gaps. Li, Lee; Li, Cai; Xiangdong, Qi; Fuchang, Lin; Yuan, Pan // Journal of Applied Physics;Mar2012, Vol. 111 Issue 5, p053306 

    Based on the gas discharge theory involving distorted E-field enhancement, a physical model is proposed to estimate the switching delay for gas-insulated trigatron spark gaps with a trigger pin inside the main electrode. Two discovered breakdown modes, i.e., fast-breakdown mode (FBM) and...

  • Paschen's law for a hollow cathode discharge. Eichhorn, H.; Schoenbach, K.H. // Applied Physics Letters;11/1/1993, Vol. 63 Issue 18, p2481 

    Derives an expression for the breakdown voltage of one-dimensional hollow cathode discharge. Specification on the breakdown condition of electrons in the discharge; Calculation and comparison between hollow cathode breakdown voltage and glow discharge operating under the same condition;...

  • Role of nonlocal ionization in formation of the short glow discharge. Kudryavtsev, A.; Morin, A.; Tsendin, L. // Technical Physics;Aug2008, Vol. 53 Issue 8, p1029 

    An analytical model for estimating basic characteristics of short (without a positive column) glow discharges is suggested that allows for electron generation both in the cathode sheath and by nonlocal ionization in the plasma negative glow. The model is based on a previously developed approach...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

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

Try another library?
Sign out of this library

Other Topics