The Numerical Electrodynamics Laboratory (NEDlab) aids in the design of devices that utilize intense beams of charged particles interacting self-consistently with electromagnetic fields, such as electron guns, ion sources, klystrons, linacs,etc. The software includes a set of numerical solution modules that all operate on the same finite difference grid.
Features
Capabilities
NEDlab features a GUI to enhance
the interaction of the user with the solution process. Screen
graphics are displayed repetitively at each time-step or iteration,
if desired by the user. NEDlab allows the user to stop the code
at any step and change the grid geometry, applied potentials,
current density, or nearly any other physical quantity of interest,
and continue the iteration to observe the effect of the change
in "near real time." This also allows the user to investigate
transient responses of the system. One example of this might be
a plasma density fluctuation in a negative ion source, which could
cause the space charge of the extracted beam to change, with a
subsequent increase in emittance. Other examples might be the
turn-on of an electromagnetic antenna, or the sudden placement
of a conducting object or plasma in a wave guide, resonant cavity,
or plasma switch. The user can stop the calculation at any time
and start again where he/she left off in the iteration or time
stepping process.
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