Hi Srinidhi
There are a number of issues assuming that your input deck is representative
1) Your START card only contains a single history to run, from a single run of 1 primary you cannot make any assertions regarding the results of your calculation since you have a large statistical uncertainty. You should likely run several million histories with (at least) 5 independent random number seeds using the already established tools to perform the averaging.
2) You used a USRBIN score (with 1 bin for x-y-z) to determine the energy deposition, you might as well use a USRTRACK score, not an issue really, but I may’ve chosen a USRTRACK instead
3) Your plot doesn’t include any statistical error, its hard judge the accuracy of a Monte Carlo calculation without any mention of the statistical error.
Thanks
Andy
On Feb 28, 2017, at 4:57 PM, Srinidhi Bheesette <srinidhi.bheesette_at_cern.ch<mailto:srinidhi.bheesette_at_cern.ch>> wrote:
Hi all,
I have simulated a pixel detector (just a silicon sensor layer) in FLUKA and bombarding it with point neutron source at different energies from 1-25.5MHz with a step size of 0.5MHz. I run a single simulation.
I then score the energy deposited in the detector (one value for one run) and then plot a graph of the energy deposited on the x-axis the source energy on the y-axis shown below:
<image.png>
The energy seems to increase till 20MeV but then start fluctuating from 20.5 to 25.5MeV and also a spike at 17MeV
Am I missing some cards in my input file (attached) for activating some feature for neutron energies after 20MeV?
Please help.
Cheers,
Shri
(Srinidhi Bheesette)
<sensor-22.5MeV.inp>
__________________________________________________________________________
You can manage unsubscription from this mailing list at
https://www.fluka.org/fluka.php?id=acc_info
Received on Wed Mar 01 2017 - 04:41:00 CET