Hi Mario,
I am not sure I fully understand the variable, AGESTK (NPFLKA). It is
said that it is the age of primary particles. What does that exactly
mean? It means the start time for a particle to be generated? or life
time to be allowed? What I need in my issue is to generate neutrons in
10e-6 seconds (a neutron burst). If I set AGESTK(NPFLKA) =
FLRNDM()/10e-6, due to my understanding, it means neutrons will be
generated in 10-6 seconds?
Thanks.
On 14-07-18 05:25 PM, Santana, Mario wrote:
> Hi Zhiyi,
>
> Most likely, the beam on/off function that you remember is that which
> can be set with the IRRPROFI card, but this is for activation/decay
> studies and would not work for the purpose you describe.
>
> What Francesco wrote in the thread that you refer at is perfectly
> valid for your studies. You will need to sample and assign a non-zero
> start time for the age of your neutrons through the AGESTK (NPFLKA)
> variable (NPFLKA is the pointer) in the source.f routine. You can then
> consult that value (the particle age) in user-routines like mgdraw.f
> and use it do define your time/space spectra.
>
> Mario
>
> From: Zhiyi Liu <zhiyil_at_triumf.ca <mailto:zhiyil_at_triumf.ca>>
> Organization: AAPS_at_TRIUMF
> Date: Friday, July 18, 2014 10:47 AM
> To: fluka-discuss <fluka-discuss_at_fluka.org
> <mailto:fluka-discuss_at_fluka.org>>
> Subject: [fluka-discuss]: pulsed neutron source
>
> Hi,
> My question is very similar to the one in the thread:
>
> http://www.fluka.org/web_archive/earchive/new-fluka-discuss/4416.html
>
> We want to set up a pulsed neutron source with a certain pulse width,
> say 100 us, then we are interested in all neutron transportation
> afterwards. The pulse width is important for neutron space
> distributions and time spectra and cannot be handled by normalization.
> So I am curious _if a user can set beam on and off with specific
> time?_ I vaguely remember FLUKA has such a function. Please confirm
> and if not, any solution?
>
> Thanks,
> Zhiyi.
> --
> Zhiyi Liu AAPS_at_TRIUMF
> 4004 Wesbrook Mall
> Vancouver, BC, Canada V6T 2A3
> Tel: (604)222-7705
> Email:zhiyil_at_triumf.ca
--
Zhiyi Liu AAPS_at_TRIUMF
4004 Wesbrook Mall
Vancouver, BC, Canada V6T 2A3
Tel: (604)222-7705
Email: zhiyil_at_triumf.ca
Received on Sat Jul 26 2014 - 04:54:22 CEST