Re: [Fwd: Re: head-on collision example]

dear all,

as i stimulate from Sebastian's comment i suppose i should generate
particles with the help of an external program like guinepig.

not: Guineapig is a beam-beam simulation code written by D. Schulte
(CERN). https://trac.lal.in2p3.fr/GuineaPig

then i use source.f (energy, particle type) and initialize generated
particles isotropically from the interaction point.

is that correct?

ciao
e.

On Wed, Oct 22, 2008 at 11:38 AM, Sebastien WURTH <wurth_at_ipno.in2p3.fr> wrote:
> Hello Ercan,
>
> As far as I know, only one beam card is accepted, the last defined
> overwrites the previous one.
> You could use source.f for your purpose with some logic that would
> reproduce what you want to simulate.
> Say we define a random number a [0,1[, if a < 0,5, then your beam is
> positron, if a >= 0,5, then your beam is electron.
>
> Hope it helps.
> Regards.
>
> Sebastien.
>
>
> Ercan Pilicer wrote :
>
>>dear all,
>>
>>i want to prepare a head-on collision example.
>>suppose that electron and positron will collide and i want to track
>>produced particles in detector volumes.
>>i tried to implement two beams in an input file but it accepts the
>>second beam normally!
>>
>>BEAM -3.0 POSITRON
>>BEAMPOS 0.0 0.0 50. POSITIVE
>>BEAM -2.0 ELECTRON
>>BEAMPOS 0.0 0.0 -50. POSITIVE
>>
>>so what steps i should follow for this purpose?
>>
>>ciao
>>e.
>>
>>
>>
>>
>
>
>
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-- 
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Ercan Pilicer
Uludag University, Turkey
High Energy Physics Department
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