Re: Moller electrons included?

[somov@jlab.org]

Hello Elke, Richard,

The moeller scattering seems to be on everywhere
in geant (at least it's used for delta-ray production).
I will check tomorrow once again.

---------

Regarding the diamond cristal simulation:

1. My understanding is that moeller scattering is simulated
when we simulate an electron beam-halo background, i.e.
geant passes electrons through the diamond (producing
incoherent beam photons). Richard correct me if I am wrong.
(though I am not sure that ionization energy losses are
simulated properly ?)

2. It's not taken into account when we generate coherent
beam photon spectrum (on the cristal) using a beamgen generator.
Tagged electron parameters are simply analytically smeared in this
case.

Richard, I would like to discuss it once again to be sure that I am
understanding it correctly.


Cheers,
       Alex






> On Sat, 22 Nov 2008, Richard Jones wrote:
>
> Richard and Alex,
>
> that was exactly my question to Alex. Maybe I should have written was
> moeller or bhabha included in the simulation. that geant can simulate it
> in principle is clear. Actually the diamond is one place but more
> important is it for the target.
> So Alex could you please check the moelle and bhabha scattering was realy
> turned on for al lthe simulations.
>
> thanks elke
>
>
>
>> Date: Sat, 22 Nov 2008 13:03:20 -0500
>> From: Richard Jones <richard.t.jones@uconn.edu>
>> To: Elke-Caroline Aschenauer <elke@jlab.org>
>> Cc: tagger list <halld-tagger@jlab.org>
>> Subject: Re: Moller electrons included?
>>
>> Elke and all,
>>
>> I think that the most important aspect of this question is *not* whether
>> Geant in principle simulations Mollers (answer is "yes") but whether
>> Mollers
>> produced in the diamond are included in the bg simulations.  I have not
>> cross-examined Alex on this, but I believe that the answer to the latter
>> question is NO.  We need to look at this.
>>
>> Richard Jones
>>
>>
>> Elke-Caroline Aschenauer wrote:
>>> 2. a question for Alex, are moeller electrons really included in your
>>>   geant simulation.
>>>
>>>
>>> Cheers elke
>>>
>>
>
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