Dear Jason,
could you send your input?
Thanks, luigi
On 21 Aug 2019, at 17:52, TYRRELL, JASON <J.TYRRELL3_at_nuigalway.ie<mailto:J.TYRRELL3_at_nuigalway.ie>> wrote:
Hello Fluka Experts,
I am trying to score absorbed dose using USRBIN. However, it requires a lot of histories to get the results that I want. I tried to use importance biasing but it doesnt seem to make a difference to the statistics or the time it takes to run a simulation.
I have set the importance from the blackhole to _at_LASTREG to 0.0001. I created an RPP filled with air adjacent to the water phantom.I added a second bias card and selected the regions RPP to the phantom and set the importance equal to 10. I was under the impression that the first bias card sets the importance of everything to 0.0001 and the second bias card over rights this for regions I am interested in? But, no improvement. I read in the manual that it is not the importance itself but the ratio of the importance that is understood by FLUKA. Is this the ratio of the importance of the first and second bias card for adjacent regions?
I am coming to the end of my project soon so any help would be greatly appreciated.
Thanks a lot,
Jason.
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Received on Wed Aug 21 2019 - 23:30:51 CEST