[Users] AHFinderDirect?

[Petr Tsatsin]

Hello,
I'm trying to use AHFinderDirect in the simulation of the NSs merger and
was wondering if somebody can suggest how to set up the parameters for this
thorn?
More precisely I simulate two neutron stars tracked by moving grids. I can
evolve this until merger and simulation fail once BH horizon has formed. I
would like to use AHFinderDirect to look for a AH. Particularly I have a
several questions:
1) Do I need 3 centres of refinement in order for AHFinder to work? By 3
centres I meant 2 moving grids and one stationary at the origin. (I just
looked at qc0 parameter file as an example)
2) What's going to happen with a 2 moving grids when apparent horizon was
formed? Since I use maximum density tracking mechanism to track the
positions of the NSs I want to switch the moving grids off after the
formation of the apparent horizon and have only one centre of refinement at
the origin.
I was wondering if somebody had an experience in this  type of simulations
and would be willing to share it.  I would really appreciate any
suggestions and help.
Thank you.

-- 
Petr Tsatsin
Graduate Student - Department of Physics
Charles E. Schmidt College of Science
Florida Atlantic University
(561)-297-3386
cell: 561-692-2040
ptsatin at fau.edu, ptsatsin at gmail.com
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