< Ec< 10^8
V/cm, that is cover both thermionic and field electron emission without
additional analysis of usefulness analytical equations for known
Richardson-Schottky and Fowler-Nordheim approximations for electron
current densities.
It is possible to change the program for:
- tunneling probability calculation by direct solving of the 1D
Shrodinger equation instead of the given by WKB approximation for the
potential barrier formed by image force of funneling electron and
external electrical field;
- calculation of the MIM (metal-insulator-metal) structures (with
p.1);
- use in calculation of the experimentally measured distributions of
the metal electrons on energy for given cathode material;
- the near surface potential barrier modification (with p.1) for the
metal covered by monatomic/thin dielectric layers of external materials.
GLADIN:
Program for the
experimental/numerical calculations data treatment - 2D
inter/extrapolation and smoothing with the interactive visual control
while the data in preparation to be used in the library collection files
or for using in calculation at intermediate values of dependent on 2
parameters.
SURFPLUS:
Program
for the calculation of the boundary conditions within the cathode spot of
the metal vapor arc. The energy balance on the surface, current density ,
pressure, erosion, ionic an electron currents and many others parameters
can be calculated for the metals: Al, Fe, Cu, Ni, Ti, W, Mo,...
Results of computations for Cu electrode presented in articles:
"The Energy Balance Structure on the Cathode Surface of the Metal Vapor Arc"
(spot_bal.pdf, 214 627 Bytes)
"Boundary Conditions for Plasma Jet Footpoint on Vacuum Arc Cathode"
(spot_ft.pdf, 140 455 Bytes)
SPOT1D, SPOT2D
:
computer modeling of the non-stationary thermal processes
within the vacuum arc cathode. It was taken into account surface and
solid/liquid phase transition border movement for the problem in 1D
(spherical symmetry - SPOT1D) and 2D (cylindrical symmetry - SPOT2D)
description approach. Boundary conditions are self-consistent with the
near electrode plasma parameters and dependent on electrode surface
temperature and the near cathode potential fall.
Results of computations for Cu electrode presented in articles:
"A One Dimensional (1D) Non �Stationary Model for Cathode Spot of the Metal Vapor Arc"
(spot_1d.pdf, 183 839 Bytes)
"A Two Dimensional (2D) Approach for Cathode Spot Modelling"
(spot_2d.pdf, 170 099 Bytes)
PLICC:
multicomponent PLasma Ionic
Composition Calculator - solver for the system up to 13x10 of nonlinear
transcendent equation set, namely Saha equations with taking into account
the lowering of the ionization potential (due to small non-ideality of the
plasma), equations for quasi-neutrality of plasma and Dalton's low for
partial pressure of given chemical elements.
MODUL:
Program for
computational experiments with results visualization developed for
optimization of the wire welding/melting processes with the time dependent
electric current, applied voltage and wire supply.
TONT, CONT, XCONT:
modeling of thermal
processes in piping repair by brazing. The computational program has been
developed for numerical experiments on the basis of solving of the
non-stationary 2D heat transportation within tubes/layer with taking into
account the melting/solidification border movement within the brazing
layer. Optimal geometrical parameters (Tube ON
Tube with overlapping - TONT,Coupling ON
Tube - CONT) and conditions of the brazed joint heating can be
determined, as well as time and energy required ateXtreme conditions (XCONT) for performance of
brazing.
(The whole project was carried out in collaboration with Dr.
I.Krivtsunet.al. and results was published in: PWJ, no.4,
2001)
D3HEAT:
modeling of 3D
non-stationary heat propagation process with taking into account the
melting process (into the case of metal piece). Complex geometry can be
constructed by using the approximation by cubic
sub-pieces.
The Sots software series can be
used for parameters evaluation within the complex problem/systems by
modeling and simulation of the more simple problem.
SYSTEM REQUIREMENTS
The programs of the SToySseries was prepared for work on personal
computers,
compatible with the IBM PC and OS Windows 9x/ NT/ ME /2000
...
(minimal requirement: MS DOS 5.0 on IBM PC i80286+i80287 <=
tested & work (!) due to used by SToyS very effective
codes/algoritms)
Computational programs was realized on C/C++ and
FORTRAN languages.
All STOYS products are subject for modification and
adaptation (on request) to meet your
goals.
