In similar lines of my previous question - on using Biasing and scoring (“How to improvise”) - I have scored from within the shield to the outer surface of the shield in the present input. Scored quantity : DOSE-EQ; user routine for 12 cylindrical sources; Energy from BEAM card.
I have few questions on the results obtained:
a) In DEbel1X usrbin - the error suddenly increased from 8.7 % to 47.58 % - I couldn’t understand the reason. The same increase in error is observed when scored along Y-direction. The decrease in DOSE-EQ seems logical (shield IN to shield OUT) but then sudden increase in error (outermost bin) confuses.
b) Similarly in the usrbins - DEtopgap and DEscrew - sudden increase in the error for the last bin ( as the outer surface is reached) - what could be the reason ?
c) the .out file - energy deposition - shows (***%) for EM showers and 0.000 % for particles escaping the system - Is it because of VOID is filled with VACUUM, it is not quantifying this ? Usually it shows definite %age of EM showers and particles escaping the system.
d) Biasing is done only in a part of the Shield (top side) - is this use correct ?
Please find attached the required files.
Can you please explain where is the mistake to get such increase in errors ?