TWIST Summer Student: Sanaz Fotoohi
In TWIST Experiment the magnetic field inside the Spectrometer needs
to be known precisely. To achieve this goal, the magnet mapper will
take the values of the magnetic field at discrete points and a
simulation in Opera will generate a three component field
map. Previous works has been done to model the TWIST Magnet in Opera
since 2002 by Mike Barnes, Roberto Armenta, and Camille Boucher. As
Roberto's full model was lost, and Camille couldn't get a full model
to mesh, my mission was to get a full model without the Quads and
Dipoles mesh. I finally got a full model to mesh by using methods of
layering and cutting planes. Solving the model and post\_processing
it, I generated the field maps of the magnetic field in the tracking
region. It took less that 24 hours to create the table of the values
by using nodal averaging rather than integration. The maps of the new
model matches none of the existing measured and opera maps, but the
new maps confirm that the doors have been modeled properly.