The default 2D 'input data' file.

 

A new simulation can be set up by selecting the default file default2.dat. This contains typical default parameters for the parameters, and so is suitable as a template for a new simulation.

 

Another file, cpo2d.dat, used to be called the ‘standard input data' file before the data-builder existed. It is still included in the CPO package.

 

If the raw data on the electrode geometry exit as a ‘dxf’ file then this can be converted to a 2D primary data file, using a conversion program that is supplied with the CPO package (and assuming that the geometry has axial symmetry).

 

See also default file for 3D.

 

The default file:

 

Default or template for CPO2D

cylindrical symmetry -cylindrical or planar symmetry?

tmp.dat name of output file, for processed data

tmp2.dat name of 2nd output file, for ray data

a n/p/m/a for nearlyzero/partial/most/all printing level

1 voltage reflection symmetries in z=0 plane

2 number of different voltages

0.01 allowed reading error

straight electrode 1st electrode

0 -1 r and z of first end

0.5 -1 r and z of second end

1 1 numbers of 2 applied voltages (can be same)

20 -2 number of subdivisions, type of subdivision

straight electrode 2nd electrode

1 -0.5 r and z of first end

1 0 r and z of second end

2 2 numbers of 2 applied voltages (can be same)

20 2 number of subdivisions, type of subdivision

no more electrode information

0 1 0.5 final number of segments, number of steps, weight

1e-06 fractional inaccuracy of charge evaluation

constant applied voltages

1 1st electrode

0 2nd electrode

n focal properties? (y/n)

y y potentials and fields along a line

-0.5 0.5 coordinates of initial end

0.5 0.5 coordinates of final end end

5 Number of points

0.0001 inaccuracy of evaluation

n n no more potentials and fields along a line

y trace rays (y/n)?

d direct (d), or mesh (m) method and mesh spacing

p 'n/p/m/a' for 'nearlyzero/partial/most/all' printing level, rho/radius

-1.5 1.5 minimum and maximum r of screen fields of view

-1.5 1.5 minimum and maximum z

-1.5 1.5 minimum and maximum r of rays

-1.5 1.5 minimum and maximum z

-1e+10 1e+10 minimum and maximum vr (m/s) of rays

-1e+10 1e+10 minimum and maximum vz

y stop ray if electrode crossed (y/n)

+ direction of time, (+/-)

1e-05 final time(ms)

0.1 0.1 3 initial and max step length(mm) and interpolation points

-0.001 fractional inaccuracy of ray tracing

1 number of test planes

0 1 1 a,b,c of test plane

n iterate to focus

el 'el' for electron; or 'co' or 'va' for other particles

k kinetic energy (k); or total energy (t) and potential

set of single rays:

0 0 0.25 1 1 0 r,z,vr,vz,eV,I

last of this set of rays

n calculate space-charges?

0 0 symmetries of rays in r=0 (or x=0) and z=0 planes

Default or template for CPO2D