This set of notebooks, ROOT scripts, and shell scripts constitute
something of a stack for doing simulations and analysis of surface
electrode traps. A few ROOT scripts take a .dxf trap layout file and
run BemSolver on them to get the potential contribution of each
electrode. Then use the notebooks to visualize potentials, fit
electrodes to a target potential, and find equilibrium positions.
To run the BemSolver scripts, first make a directory under bemsolver
for the trap you wish to simulate.
mkdir bemsolver/newsimulation
cd bemsolver/newsimulation
Add your .dxf layout file as layout.dxf. To compute the electrode
potentials, you will need to define a grid to compute on. Here is an
example of what to put in grid.txt:
---
num_electrodes: 10
dimx: 21
dimy: 21
dimz: 21
startx: -50
starty: -100
startz: 150
endx: 50
endy: 100
endz: 250
Mind the initial ---. You'll have to set these values appropriately:
num_electrodes is the number of DC electrodes on one side of the trap,
dimx, dimy, and dimz are the number of points to compute on each
axis, and startx/endx, etc., are the positions to interpolate
between on the grid.
To run BemSolver, stay in your subdirectory and do the following:
../solve_cache.sh
../all_fields.sh
The solution cache is computed first so the fields can be calculated in
parallel; try not to forget to run that every time you change the trap.
Then you can put the .txt files generated by BemSolver in
notebooks/data and run the analysis notebooks on them.