Message: Re: Speed Difference between Parameterised and Replica? Not Logged In (login)
 Next-in-Thread Next-in-Thread
 Next-in-Forum Next-in-Forum

None Re: Speed Difference between Parameterised and Replica? 

Forum: Geometry
Re: None Speed Difference between Parameterised and Replica? (Ryan)
Re: None Re: Speed Difference between Parameterised and Replica? (John Apostolakis)
Re: None Re: Speed Difference between Parameterised and Replica? (Ryan)
Date: 11 Jul, 2007
From: John Apostolakis <John Apostolakis>

Dear Ryan,

Could you please give your affiliation and explain the application area 
for which this is destined ?

With your hotmail address (which is bouncing) it is unclear where you 
are writing from, and as such what your final application could be - and 
it matters for formal (institution) reasons.

Thanks,
John.

Ryan wrote:
> *** Discussion title: Geometry
> Email replies to PublicHyperNews@slac.stanford.edu must include:
>   In-Reply-To: <"/geometry/755/3/1"@geant4-hn.slac.stanford.edu>
>   Subject: ...change this to be about your reply.
>
> Thanks for the feedback. I've been wanting to ask about how to properly
> implement voxel phantoms.
>
> I want to place a sphere of lead inside a cubic world volume, with the
> sphere diameter being 1/10 that of the world. What I want to see is the
> resulting 3D dose distrubution in the entire world volume.
>
> What I did was use parallel geometry to define a 3d dose scoring grid.
> The grid is currently defined using parameterised volumes. It is not
> necessary to define a material for the grids because they are defined in
> the parallel world, and the grid will just take on any material in the
> real world.
>
> So essentially, each voxel in the grid (parallel world) is the same, and
> like you said, it's better to implement it as replicas instead.
>
> I'm glad you brought up the stepping problem. Due to the artifical
> voxels, the steps are stopped at the boundaries, which is as you
> mentioned, making my simulation take much longer.
>
> Is there any way to score dose in the entire world volume without
> artificially placing scoring cells as grid? Or maybe there's a better to
> implement what I want to do?
>
> Thanks
>   

Inline Depth:
 1 1
 All All
Outline Depth:
 1 1
 2 2
 All All
Add message: (add)

1 None: Re: Speed Difference between Parameterised and Replica?   (Ryan - 11 Jul, 2007)
 Add Message Add Message
to: "Re: Speed Difference between Parameterised and Replica?"

 Subscribe Subscribe

This site runs SLAC HyperNews version 1.11-slac-98, derived from the original HyperNews


[ Geant 4 Home | Geant 4 HyperNews | Search | Request New Forum | Feedback ]