squares

To install:

1. git clone
2. cd squares
3. git submodule init
4. git submodule update

Then run squarespeed.py.

What the code does:

• sets up an array of coils inscribed on a cube
• sets up an array of fluxgates distributed throughout a smaller cube
• calculates the matrix in B=M*I by setting each coil current I in turn and measuring B at each sensor position.
• inverts the matrix, carefully excising the zero mode.
• selects a target field B_target (uses the Pis library)
• calculates I_set = M^{-1} B_target and sets those currents on the cube
• makes graphs of the resultant true field and graphs them in a few views (presently along axes), comparing with the target field.