[Halld-offline] Fwd: how to make evio files from simulation

[Sean Dobbs]

Hi all,

Following the discussion at the Offline meeting yesterday, I went ahead and
changed the Hit Factory code so that the per-detector time offsets are
loaded from the CCDB instead of being hardcoded.

What does this mean for you?  If you are running over HDDM files, this
change doesn't affect you.  If you are running over EVIO files
corresponding to actual data, then you don't have to do anything (the
default time offsets are set to 0).  If you are running over EVIO files
created from simulated data, then you need to select the "mc" CCDB
variation (the time offsets for this variation are currently set to the
-100 ns default used in the HDDM -> EVIO conversion).  To do this, you
should set the environmental variable

    JANA_CALIB_CONTEXT="variation=mc"

Of course, if you generate the EVIO files using the rawevent plugin with a
non-standard version of t_min (this parameter can be set on the command
line), you should change the per-detector time offsets in a local SQLite
copy of the CCDB.

Please let me know if you have any questions about this change.

Cheers,
Sean

On Wed, Sep 17, 2014 at 9:58 PM, David Lawrence <davidl at jlab.org> wrote:

>
>  Hi All,
>
>    One other point of reference is the wiki page here:
>
>
> https://halldweb1.jlab.org/wiki/index.php/HOWTO_convert_MC_data_to_EVIO_and_replay_it
>
>  Regards,
> -David
>
>  On Sep 17, 2014, at 2:21 PM, Richard Jones <richard.t.jones at uconn.edu>
> wrote:
>
>   Hello Matt and all,
>
>  *A quick start guide*
> See http://zeus.phys.uconn.edu/halld/tagger
> http://zeus.phys.uconn.edu/halld/tagger/fp-microscope/sim-recon-rj-pm/work/dev,
> particularly the run scripts therein.
>
>    1. run_bggen.sh
>    2. run_hdgeant.sh
>    3. run_mcsmear.sh
>    4. run_rawevents.sh
>    5. raw_danarest.sh
>
> To create and test a evio file, create a work directory and copy these 5
> scripts from the above web folder into it, plus the input control.ini file
> that goes with them. Then run the 5 scripts listed above without arguments,
> in the order given. The last step just shows how to read the evio file and
> make an analysis on it.
>
>  -Richard Jones
>
>  _______________________________________________
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>
>
>


-- 
Sean Dobbs
Department of Physics & Astronomy
Northwestern University
phone: 847-467-2826
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