Re: Biasing primary particles

nline.hu>
MIME-Version: 1.0
Content-Type: text/plain; charset=3D"ISO-8859-1"
Content-Transfer-Encoding: 8BIT
X-CERN-Reverse-DNS: cernfe12.cern.ch
X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.0 (smtp=
1.mi.infn.it [192.84.138.69]); Mon, 14 Jul 2008 14:16:20 +0200 (CEST)
Sender: owner-fluka-discuss@mi.infn.it

Dear David

The card
BIASING 2.0 2.0 USER
applies the default values for the region range (since the parameters are=
=20
left blank) which is only region No.2

Instead you should use
BIASING 2.0 2.0 BlckHole @LASTREG USER

btw, why did you choose What(2)=3D2?

You can verify the generation number in USIMBS, e.g. by printing LTRACK.

Please let me know if this solves you problem.

cheers
Stefan

On Mon, 14 Jul 2008, Horv=E1th D=E1vid wrote:

> Dear Stefan
>=20
> The call of USIMBS is working because with it the running time is longer =
than
> without it, but it seems it's not applied to the primaries.
>=20
> I attached my input, source.f and usimbs.f, but you have to enable in the
> imput the biasing card of usimbs, and disable the manual biasing.
>=20
> I also attached a copy of deq99c.f. It also used in the input.
>=20
> Thank you, for checking.
>=20
> Best regards,
>=20
> David HORVATH
> engineering physicist student
> Budapest University of Technology and Economics
>=20
>=20
> Stefan Roesler =EDrta:
> > Dear David,
> >=20
> > By default, importance biasing applies to primaries and also USIMBS sho=
uld
> > be called at the first transport step, provided you have a BIASING card=
 with
> > SDUM=3DUSER. If you post input, source and usimbs I could have a look.
> >=20
> > Regards
> > Stefan
> >=20
> >=20
> > On Tue, 8 Jul 2008, Horv=E1th D=E1vid wrote:
> >=20
> > > Dear Fluka users,
> > >=20
> > > I'm trying to simulate a shielding for a spent fuel of nuclear reacto=
r.
> > > For to
> > > do this I'm using the soure.f routine to generate photons with differ=
ent
> > > energies. I need to transport this photons through a lead shielding.
> > > To get results with good statistics the importance of primary photons=
 is
> > > needed. With manual biasing (slicing into smaller regions) I could bi=
as
> > > these
> > > photons, but my geometry will be to complicated for manual biasing. A=
nd
> > > here
> > > is my problem. With the usimbs.f routine I make the biasing, but I
> > > couldn't
> > > manage to apply this to the primary photons.
> > > How can use this routine for the primaries?
> > > Thanks for your answers.
> > >=20
> > > Best regards,
> > >=20
> > > David HORVATH
> > > engineering physicist student
> > > Budapest University of Technology and Economics
> > >=20
> > >=20
> >=20
>=20

--=20
___________________________________

Stefan Roesler
CERN, SC/RP
CH-1211 Geneva 23
Switzerland

Phone: +41-22-7679891
Fax: +41-22-7669639
E-mail: Stefan.Roesler@cern.ch
Received on Mon Jul 14 18:51:27 2008