[FLASH-USERS] Question about ray tracing

[pchang]

Hi all,
I am simulating a cylindrical target being imploded by illuminating 10 
laser beams around the cylindrical target. I start with the fully 
azimuthal symmetric case first, i.e., all the beams are point to z-axis 
(r=0). Following are my questions:
(1) In 2D laser ray tracing in 2D cylindrical symmetric simulation, does 
it take the average of the laser energy in azimuthal direction? or does 
it just treat the azimuthal direction as one of the boundary? In my 
case, 10 beams distributed in azimuthal direction uniformly. How do I 
setup the beams?
(a) have only one beam on the plane of phi=0 with the actual laser 
energy of single beam?
(b) have only one beam on the plane of phi=0 and with the actual total 
laser energy of 10 beams?
(c) have all the beams given in the flash.par with the correct pointing 
setup?

(2) The same question, what if I am using 3D laser ray tracing in 2D 
cylindrical symmetric simulation?

(3) I may use up to 40 beams in future. Especially I may use 3D ray 
tracing in 2D cylindrical symmetry since I may point the laser off 
z-axis. Do I type the laser setting manually in flash.par? or can I have 
a subroutine to generate the beams just like Simulation_initBlock.f90 is 
used to generate the target?

Thank you

Po-Yu

-- 
Po-Yu Chang
Postdoc
Fusion Science Center,
Laboratory for Laser Energetics
University of Rochester
250 East River Road
Rochester, New York 14623
Phone: (585) 273-5179
FAX: (585) 275-5960
pchang at lle.rochester.edu