Re: Fwd: [fluka-discuss]: scoring scattered spectrum in different angles

From: Mikhail Polkovnikov <Михаил Полковников> <pmk_at_ihep.ru>
Date: Sun, 24 May 2015 12:18:15 +0300

On 23.05.2015 13:01, "Mikhail Polkovnikov <Михаил Полковников>" wrote:
> On 20.05.2015 16:39, Hamideh Jalali wrote:
>>
>> ---------- Forwarded message ----------
>> From: *Hamideh Jalali* <jalali.hb_at_gmail.com <mailto:jalali.hb_at_gmail.com>>
>> Date: Tue, May 19, 2015 at 12:47 PM
>> Subject: Re: [fluka-discuss]: scoring scattered spectrum in different
>> angles
>> To: Joachim Vollaire <joachim.vollaire_at_cern.ch
>> <mailto:joachim.vollaire_at_cern.ch>>
>>
>>
>> Hi
>>
>> Please find my input, source.f and flux.dat in attachment.
>> unfortunately I did not get any result.
>>
>> Thanks in advance
>> Hamideh
>>
>> On Tue, May 19, 2015 at 11:36 AM, Joachim Vollaire
>> <joachim.vollaire_at_cern.ch <mailto:joachim.vollaire_at_cern.ch>> wrote:
>>
>> Hi
>>
>> Yes I would give it a try. Still in practice it should work with
>> USRTRACK as well.
>>
>> Maybe you could send me your input I could have a look.
>>
>> I did a similar calculation a few years ago hitting a mirror in a
>> shielded box, I was looking at the dose rate, not at the energy
>> spectrum of scattered photons but it worked fine for my application…
>>
>> Greetings
>>
>> Joachim
>>
>> *From:*Hamideh Jalali [mailto:jalali.hb_at_gmail.com
>> <mailto:jalali.hb_at_gmail.com>]
>> *Sent:* 19 May 2015 06:33
>> *To:* Joachim Vollaire
>> *Subject:* Re: [fluka-discuss]: scoring scattered spectrum in
>> different angles
>>
>> Dear Joachim
>>
>> Thanks for your response but there is no problem with me for
>> defining source and geometry. My problem is just scoring spectrum
>> in an exact angle and getting a figure like attached one.
>>
>> Did you mean I can get such a graph by USRYIELD card? In that
>> card we should determine an upper and lower limit for angle too.
>>
>> Kind Regards
>>
>> Hamideh
>>
>> On Tue, May 19, 2015 at 12:54 AM, Joachim Vollaire
>> <joachim.vollaire_at_cern.ch <mailto:joachim.vollaire_at_cern.ch>> wrote:
>>
>> Dear Hamideh
>>
>> I suggest to look at the following presentation. For the
>> simulation of the synchrotron source:
>>
>> There is the possibility to use a built-in source to generate
>> primary photons samples from a generic synchrotron spectrum
>> (starting slide 16).
>>
>> https://indico.cern.ch/event/334606/contribution/35/material/slides/0.pdf
>>
>> For scoring, look at the card USRYIELD to score a double
>> differential yield
>>
>> For the geometry, your system is rather straightforward, I do not
>> have specific advice
>>
>> Best of luck with your study
>>
>> Joachim
>>
>> *From:*owner-fluka-discuss_at_mi.infn.it
>> <mailto:owner-fluka-discuss_at_mi.infn.it>
>> [mailto:owner-fluka-discuss_at_mi.infn.it
>> <mailto:owner-fluka-discuss_at_mi.infn.it>] *On Behalf Of *Hamideh
>> Jalali
>> *Sent:* 18 May 2015 13:16
>> *To:* fluka-discuss
>> *Subject:* [fluka-discuss]: scoring scattered spectrum in
>> different angles
>>
>> Dear FLUKA Experts
>>
>> I would like to resolve a problem as a benchmark. In my problem a
>> spectrum of photons (synchrotron radiation) in +z direction
>> strike an inclined Si target and scattered SR spectrum is scored
>> behind two SiO2 plates in x direction.
>>
>> As attached figure shows the spectrum of scattered photons has
>> been scored in theta=90 (i.e. z=100 ,x=100) and 18 degrees(i.e.
>> z=307,x=100).
>>
>> My question is, how can I score the spectrum in exactly these two
>> points? If I define a very small region the time of run will not
>> be logical and bigger region could not be matched with those angles.
>>
>> Any help would be appreciated.
>>
>> Best Regards
>>
>> Hamideh
>>
>> PS: the geometry of problem has been attached too.
>>
>>
>>
> Dear Hamideh,
>
> Major problem with source routine is the flux.dat file.
> Your energy values in flux.dat file are unsorted. You must have data
> in the increasing order in case of their energy to sample it properly.
>
> Then photons in your source routine don't have any polarization:
> TXPOL (NPFLKA) = -TWOTWO
> TYPOL (NPFLKA) = +ZERZER
> TZPOL (NPFLKA) = +ZERZER
>
> The polarization in your input file should be implement into source
> file as:
>
> TXPOL (NPFLKA) = UBMPOL
> TYPOL (NPFLKA) = VBMPOL
> TZPOL (NPFLKA) = WBMPOL
>
> Best regards.
>
Dear Hamideh,

One more thing. I suppose USRYIELD cards where you are scoring spectrum
in particular angles should be:

*...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....
USRYIELD 2399. PHOTON -32. SCDOWN SCUP 90deg
USRYIELD 1E-4 1E-6 50. 91. 90. 2706. &

USRYIELD 2399. PHOTON -32. SCDOWN SCUP 18deg
USRYIELD 1E-4 1E-6 50. 19. 18. 2706. &

USRYIELD 2399. PHOTON -32. SCDOWN SCUP 20deg
USRYIELD 1E-4 1E-6 50. 21. 20. 2706. &

Just swap "Ekin GeV" and "Polar lab deg".

Best regards.




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Received on Sun May 24 2015 - 13:16:46 CEST

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