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Forum: Biasing and Scoring
Re: Question Best way to score radially symmetric quantities (William Donahue)
Date: 28 Jan, 2018
From: michel maire <michel maire>

On Sat, 27 Jan 2018 17:30:54 GMT, William Donahue wrote:
> Hi,
> I am embarking on a radial dose model validation study and would like to
> find the best way to score doses radially.
> Basically, I want to score in r and z but not theta. I am planning on
> using the multi-threaded kernel so I can't decide if I want to use the
> command-based scoring or a sensitive detector. I eventually want to
> score things like LET and other quantities so I need it to be flexible.
> Additionally I would like to score the central core of the track
> separately, preferably only with primaries.
> If someone could point to a good direction, with a little bit of a
> starting hint that would be great. I am very comfortable with C++ so the
> coding shouldn't be an issue.
> My thoughts so far have been
> 1) Command based scoring: but the inputs of the command are ambiguous
> for cylindrical volumes.
> 2) Construct many ring like geometries in r and depth, and assign each a
> primitive scorer. This seems a little time consuming, even with
> replicas. Also keeping track of all the scorers could be a pain.
> 3) Do a hit collection and post process at end of run. This might be a
> pain because then I have to deal with the calculations of correctly
> distributing the dose into my sub-volumes.
> 4) Step based scoring. Once again need to deal with all the dose
> distributions in each step across my boundaries.
> So if you have any suggestions on which way is most efficient please
> elaborate more. Expanding/explaining techniques to implement one of my
> thoughts is a good place to start too.
> Thanks,
> William Donahue

  1- You are not obliged to use scorers or hits collections (many examples in electromagnetic or hadronic do not).
       See TestEm2 (the closest of your geometry) or TestEm3
  2- TestEm11 or TestEm12 show option : stepMax versus replica
  3- basic/B4 illustrates the different strategies to record informations : user actions, hits collections, scorers.

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