Date: Wed, 22 Apr 2015 17:37:09 -0700
Thanks Mario.
But I don't think I have been too aggressive in the biasing.
I start biasing 1 meter from the center of the target (RMIN = 100 cm)
and bias by a factor of 2 every 35 cm (RINC) until R = 800 cm (RMAX).
See attached image. This is what I print in the output file (for lfirst).
****** usimbs CALLED *****
AETE_Cx -1278.
AETE_Cy 8183.88
AETE_Cz 5948.
DMIN_IMP 0.0001
RMIN 100.
RMAX 800.
RINC 35.
1 99999 99999 0.0000000E+00
1.0000000E+30 0
NEXT SEEDS: E9 0 0 0 0 0 C6AD
2A4C 0 0
2000 98000 98000 5.6441402E-04
1.0000000E+30 133
NEXT SEEDS: 2C8E4A 0 0 0 0 0 C6AD
2A4C 0 0
4000 96000 96000 5.5066633E-04
1.0000000E+30 255
NEXT SEEDS: 57629D 0 0 0 0 0 C6AD
2A4C 0 0*
...
...
In the .err file, I see:
*NEXT SEEDS: 0 0 0 0 0 0 C6AD
2A4C 0 0**
** 1 99999 99999 0.0000000E+00
1.0000000E+30 0 **
** NEXT SEEDS: E9 0 0 0 0 0 C6AD
2A4C 0 0**
** 2000 98000 98000 5.7591248E-04
1.0000000E+30 133 **
** NEXT SEEDS: 2C8E4A 0 0 0 0 0 C6AD
2A4C 0 0**
** 4000 96000 96000 5.6066513E-04
1.0000000E+30 255 **
** NEXT SEEDS: 57629D 0 0 0 0 0 C6AD
2A4C 0 0**
** 6000 94000 94000 5.9057713E-04
1.0000000E+30 409 **
** NEXT SEEDS: 8987D8 0 0 0 0 0 C6AD
2A4C 0 0**
** 8000 92000 92000 5.9815907E-04
1.0000000E+30 530 **
** NEXT SEEDS: B9BD7F 0 0 0 0 0 C6AD
2A4C 0 0**
** 10000 90000 90000 6.0090866E-04
1.0000000E+30 666 **
** NEXT SEEDS: E9782F 0 0 0 0 0 C6AD
2A4C 0 0**
** 12000 88000 88000 6.2340530E-04
1.0000000E+30 808 **
** NEXT SEEDS: 120B7BB 0 0 0 0 0 C6AD
2A4C 0 0**
** 14000 86000 86000 6.2054852E-04
1.0000000E+30 939 **
** NEXT SEEDS: 14F66E4 0 0 0 0 0 C6AD
2A4C 0 0**
** 16000 84000 84000 6.1765611E-04
1.0000000E+30 1058 **
** NEXT SEEDS: 17DC3F2 0 0 0 0 0 C6AD
2A4C 0 0**
** *** Doeimb: importance splitting not performed for missing room **
** in Emf stack *****
** *** Doeimb: importance splitting not performed for missing room **
** in Emf stack *****
** *** Doeimb: importance splitting not performed for missing room **
** in Emf stack *****
** *** Doeimb: importance splitting not performed for missing room **
** in Emf stack *****
** *** Doeimb: importance splitting not performed for missing room **
** in Emf stack *****
** *** Doeimb: importance splitting not performed for missing room **
** in Emf stack *****
** *** Doeimb: importance splitting not performed for missing room *
*...**
**...*
Thanks,
Mina
On 15-04-22 02:31 PM, Santana, Mario wrote:
> From the message, and given that you were setting importances via
> usimbs.f, it seems that you have gone too aggressive in the biasing
> and you have filled the emf stack.
>
> This means that you set a step biasing split that was much bigger than
> the attenuation for your electrons and photons through your shielding.
> As a result, the population of electrons and photons was growing
> larger every step, and you filled the memory.
>
> Reduce the parameter by which you bias. Normally you would want to set
> that parameter so that the population of your particles of interest
> stays more or less constant.
>
> - Mario
>
> From: Mina Nozar <nozarm_at_triumf.ca <mailto:nozarm_at_triumf.ca>>
> Date: Wednesday, April 22, 2015 12:36 PM
> To: fluka-discuss <fluka-discuss_at_fluka.org
> <mailto:fluka-discuss_at_fluka.org>>
> Subject: [fluka-discuss]: user biasing using usimbs.f *** Doeimb:
> importance splitting not performed for missing room, in Emf stack ***
>
> Hello everyone,
>
> I have been trying to do biasing via usimbs.f. It has taken me few
> days of trial and error. I think I have fixed few issues (one of
> which resulted in a core dump).
>
> Now, I am seeing the following message repeated ad nauseam in the
> .err file. What does this message mean and how can I go about fixing it?
>
> *
> ***** Doeimb: importance splitting not performed for missing room **
> ** in Emf stack ****
>
>
>
> Thanks in advance,
> Mina
__________________________________________________________________________
You can manage unsubscription from this mailing list at https://www.fluka.org/fluka.php?id=acc_info
(image/jpeg attachment: usimbs.jpg)