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Tally filter for first-flight collision probabilites #960

smharper opened this Issue Jan 26, 2018 · 1 comment


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smharper commented Jan 26, 2018

It would be handy if we could compute first-flight collision probabilities. I imagine we could do it by adding something like last_collision_material to the particle header which tells us in which material the particle had its last collision (or was born). Then we could filter it with a LastCollisionMaterialFilter that would be similar in implementation to a MaterialFilter.

@johnnyliu27, would you like to tackle this issue?


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johnnyliu27 commented Jan 26, 2018

Sure I’d like to give a try on this. Regarding to the future implementation of CMM, a variable in the particle header recording the neutron’s birth place will be definitely more useful for CMM.
I’ll update here when I get into more details on this.

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