Fat energy deposition in cavity for EGS_fac

[BINDX93]

Could you tell me what is the meaning of fat energy deposition in cavity?

My calculated result of EGS_fac shows several messages as below:

Fat energy deposition in cavity:
iarg=3 edep=0.00401493 wt=0.00102385 q=-1 latch=0 is_fat=1
Fat energy deposition in cavity:
iarg=3 edep=0.00518924 wt=0.00102379 q=-1 latch=0 is_fat=1
Fat energy deposition in cavity:
iarg=3 edep=0.00501246 wt=0.00102394 q=-1 latch=0 is_fat=1
Fat energy deposition in cavity:
iarg=3 edep=0.00604417 wt=0.00102393 q=-1 latch=0 is_fat=1

[rtownson]

A fat particle results from the russian roulette variance reduction technique, but generally those particles should never reach the cavity. Are you using a phase-space that has fat particles in it, like from using DBS in BEAMnrc?

[BINDX93]

Thanks for your reply. No, I am not. I used a point-source. When I reduce hte number of photon splitting. this phenomenon is disappear. I am a beginner of the EGS-fac. Thanks. ------------------&nbsp;原始邮件&nbsp;------------------ 发件人:&nbsp;"Reid Townson"<notifications@github.com&gt;; 发送时间:&nbsp;2019年12月13日(星期五) 凌晨2:30 收件人:&nbsp;"nrc-cnrc/EGSnrc"<EGSnrc@noreply.github.com&gt;; 抄送:&nbsp;"斌DX"<1021641320@qq.com&gt;;"Author"<author@noreply.github.com&gt;; 主题:&nbsp;Re: [nrc-cnrc/EGSnrc] Fat energy deposition in cavity for EGS_fac (#563) A fat particle results from the russian roulette variance reduction technique, but generally those particles should never reach the cavity. Are you using a phase-space that has fat particles in it, like from using DBS in BEAMnrc? — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub, or unsubscribe.

[rtownson]

Hi @BINDX93, you're welcome to send me your input file if this is still an unresolved issue for you.