[Clas12_software] CLAS12 fastmc

[mhattawy@anl.gov]

Hello Volker,
   Thanks a lot for this clear explanation. Regarding the latest version of
the FASTMC, I received a new routine that has more accurate detector
geometry (
http://clasweb.jlab.org/clas12offline/docs/software/html/reconstruction/fastMonteCarlo.html).
For the resolution parameters, I have been told that it is not updated yet.
Therefore, I will use the old fastmc smearing parameters. Of course at some
point we need to use the full reconstruction software, but for the moment a
fastmc does the job.

Best reagrds,
Mohammad.

On Tue, Nov 24, 2015 at 1:55 PM, burkert <burkert at jlab.org> wrote:

> Mohammad,
>
>  I was wondering if you did get the latest version of the FASTMC?
>
>  As we discussed when I was at Argonne the distortions come from the fact
> that you plot the phi angle in the vertex frame. I guess even a more recent
> version of FASTMC will give a similar distortion, as it is the result of
> the solenoid field bending the electrons in phi and with increasing polar
> angle and lower momentum the effect will be increasing. So, electrons
> entering one given sector have started at different phi angles at the
> vertex. In order to eliminate the effect you need to plot against the phi
> angle at the first layer of DC region 1 as the integrated solenoid field is
> nearly zero there.
> I am not sure the FASTMC allows you to do it, but once you use the full
> reconstruction then the coordinate in DC layer 1 region 1 (dc1)  should be
> computed and phi_dc1 calculated.
>
> I hope that helps,
> Volker
>
>
>
>
>
>
>
> On 11/11/15 12:57 PM, hattawy at jlab.org wrote:
>
> Dear All,
>     I am using a relatively old version of CLAS12 fastmc which gives me a
> huge deflection in the azimulthal angles for the electrons at polar
> angles greater than 15 deg (see attached plot for the DVCS electrons
> using beam energy of 11 GeV).
>     Can you please direct me where I can find  the latest or a tested
> version of CLAS12 fastmc. Thanks in advance for the help.
>
> Best regards,
> Mohammad Hattawy.
>
>
>
> This body part will be downloaded on demand.
>
>
>
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-- 
Best regards,
Mohammad Hattawy.
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