- Contemporary messages sorted: [ by date ] [ by thread ] [ by subject ] [ by author ] [ by messages with attachments ]

From: Hamideh Jalali <jalali.hb_at_gmail.com>

Date: Sun, 2 Aug 2015 19:52:51 +0430

Dear FLUKA users

We know the fluka results (fluence, dose, deposited energy and ...) are

reported per primary particle, so we should multiply the fluka results by

the number of primary particles to get the final value of our desired

quantities. For example when we have an electron beam with a certain

current, the number of primaries is determined by the current of beam

(electron/second).

In my case I have a number of photons which have different energies. In

other word, in my FLUX.dat file there are two columns, first column is

energy(E) and second is photon/s/energy(F). I used this file to program a

source.f.

Maybe there is a kind of misunderstanding with me about the calculation of

the number of whole photons or primaries per second. I think, to get the

whole number of photons I should multiply the second column in dat

file(photon/sec/energy) by first column (energy). Then sum up all photon/s

to find the final number of primaries per second. The fluka results should

be multiplied by this number to get my desired quantity(dose equivalent

rate in my problem).

But by using this way, my final results are much more than expected values.

There are some other methods to calculate the number of primaries:

Sigma( (Ei+1 - Ei) * Fi )

Sigma( (Ei + Ei+1) / 2) * Fi)

Sigma ( (Ei+1 - Ei) *( Fi+1 + Fi))

Sigma( (Ei + Ei+1) / 2) * (Fi + Fi+1))

Could you please guide me which one is correct?

I hope I could have explained clearly what I mean.

Kind Regards

Hamideh

__________________________________________________________________________

You can manage unsubscription from this mailing list at https://www.fluka.org/fluka.php?id=acc_info

Received on Sun Aug 02 2015 - 18:52:50 CEST

Date: Sun, 2 Aug 2015 19:52:51 +0430

Dear FLUKA users

We know the fluka results (fluence, dose, deposited energy and ...) are

reported per primary particle, so we should multiply the fluka results by

the number of primary particles to get the final value of our desired

quantities. For example when we have an electron beam with a certain

current, the number of primaries is determined by the current of beam

(electron/second).

In my case I have a number of photons which have different energies. In

other word, in my FLUX.dat file there are two columns, first column is

energy(E) and second is photon/s/energy(F). I used this file to program a

source.f.

Maybe there is a kind of misunderstanding with me about the calculation of

the number of whole photons or primaries per second. I think, to get the

whole number of photons I should multiply the second column in dat

file(photon/sec/energy) by first column (energy). Then sum up all photon/s

to find the final number of primaries per second. The fluka results should

be multiplied by this number to get my desired quantity(dose equivalent

rate in my problem).

But by using this way, my final results are much more than expected values.

There are some other methods to calculate the number of primaries:

Sigma( (Ei+1 - Ei) * Fi )

Sigma( (Ei + Ei+1) / 2) * Fi)

Sigma ( (Ei+1 - Ei) *( Fi+1 + Fi))

Sigma( (Ei + Ei+1) / 2) * (Fi + Fi+1))

Could you please guide me which one is correct?

I hope I could have explained clearly what I mean.

Kind Regards

Hamideh

__________________________________________________________________________

You can manage unsubscription from this mailing list at https://www.fluka.org/fluka.php?id=acc_info

Received on Sun Aug 02 2015 - 18:52:50 CEST

*
This archive was generated by hypermail 2.3.0
: Sun Aug 02 2015 - 18:52:51 CEST
*