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None Re: Running IAEA phase space files as particle generator 

Forum: Run Management
Re: None Running IAEA phase space files as particle generator (Brett Cunningham)
Re: Note Re: Running IAEA phase space files as particle generator (Miguel Cortes-Giraldo)
Date: 14 Jun, 2016
From: Brett Cunningham <Brett Cunningham>

Hi Miguel,

Thankyou for your response, yes it clears some things up for me although what you had said is kind of what I expected was the case, but was hopeful there was a method around discarding the null events.

With that said, I've written a method to read the phase space file explicitly and assign the variables (position, momentum and energy) to a particle gun thus "dumping" the null events. I've also found that if I run the simulation multiple times in a single instance using this method, each run uses a different seed thus getting unique events each run. My question relating to this is - does this seem like a reasonable alternative to using IAEA's recycling method? I might be missing something critical, but for my purposes it seems like a decent way to cut out hours of simulation time when reading in a phase space file to get a few thousand particles out.

I have another question not overly relevant to this particular forum category, but phase space related. I can't seem to be able to use multi-threading when writing a phase space file, it works perfectly when reading one as a particle generator or particle gun, but I always get a runtime error(Segmentation fault (core dumped)) when trying to write one after /run/beamOn. I've run it through DD debugger, and all I can tell you is that the error that gets printed out is:

Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 0x7fffe5a45700 (LWP 3157)] 0x0000000000427ac9 in iaea_set_constant_variable ()

It would be really nice to be able to write using MT, so any help here would be greatly appreciated.

Regards Brett

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