Re: Fluence Versus Time

There is another way to score in time bins, perhaps less elegant than
that described by Paola, but with the advantage that you don't need to
write a user routine, with the associated risk of errors.
Again, you need to define as many USRBDX detector as your wished time-bins,
and you set a scoring time limit by command TCQUENCH (see the manual).
In this way, you get only a TMAX and no TMIN for each bin, but you can
obtain time windows by successive subtractions.

Alberto

On Mon, 1 Dec 2008, paola sala wrote:

> Dear Reza Talei,
> there is no automatic way to score in time-bins. What you can do, is to
> define as many USRBDX detector as your wished time-bins, and
> set the time windows in the fluscw.f routine . For instance:
>
> INCLUDE '(TRACKR')
> DT = 10.D-09
> TMAX = JSCRNG * DT
> TMIN = TMAX - DT
> IF ( ATRACK .GE. TMIN .AND. ATRACK .LT. TMAX ) THEN
> LSCORE = .TRUE.
> ELSE
> LSCORE = .FALSE.
> END IF
>
> will give in the first USRBDX ( JSCRNG =1) the fluence of particles
> with "age" between 0 and 10 nanoseconds, in the n-th usrbdx the flux
> between (n-1)*10 nsec and n*10 nsec.
>
> By the way, it would be useful to have this coded in the standard
> scoring..maybe in the next release!
>
> Ciao
> Paola
>
> On Sat, 2008-11-29 at 17:39 +0330, reza taleei wrote:
>> Dear fluka users,
>>
>> I would like to score the neutron fluence over a sphere of water
>> versus time. in this problem I have a sphere of water and a neutron
>> source in the middle. As explained in the manual, fluka can calculate
>> the time dependence problems. I would like to know how can I score
>> these neutrons exiting the sphere per time bin. Thank you in advance.
>>
>> Best regards,
>> Reza Taleei.
>>
>
>

-- 
Alberto Fasso`
SLAC-RP, MS 48, 2575 Sand Hill Road, Menlo Park CA 94025
Phone: (1 650) 926 4762   Fax: (1 650) 926 3569
fasso_at_slac.stanford.edu