[Halld-pid-upgrade] Fwd: [Halld-elog][PID-Upgrade] HDGeant (GEANT3) Simulation of DIRC

[Richard Jones]

Hello Yi and all,

This is great news, thanks for checking it in.  I will have a look at it
after I have completed the current g4 development.  Did you create a new
hitXXXX.c to collect hits information, and add new clauses to gustep.F and
saveHits to support it in hdgeant?

I appreciate your keeping this big revision out of the main hdds trunk
until I am done with the hdgeant4 release.  After that, we will work
together to start the process of merging in the updates and working out the
problems with overlaps.  I would prefer not to have to stop g4 development
right now and spend a couple of weeks removing overlaps from the new DIRC
geometry.

-Richard J.


On Tue, Oct 8, 2013 at 4:43 PM, Yi Qiang <yqiang at jlab.org> wrote:

>  Hi all,
>
> I added the DIRC detector into the HDGeant HDDS geometry. For more
> details, refer to the following elog entry:
> https://halldweb1.jlab.org/elog-halld/PID_Upgrade/10
>
> The RICH library has also been updated with a new RichTruthHit factory to
> extract all useful information of particles entering the DIRC. Accordingly,
> the JANA plugin mc_tree has been updated too to utilize this new factory.
>
> Let me know if you have any questions using the new codes, and attached is
> an example of accumulated hits generated by 4GeV pions (1000 events).
>
> Cheers,
> Yi
>
>
> -------- Original Message --------  Subject: [Halld-elog][PID-Upgrade]
> HDGeant (GEANT3) Simulation of DIRC  Date: Tue, 08 Oct 2013 16:04:33 -0400  From:
> Yi Qiang <yqiang at jlab.org> <yqiang at jlab.org>  To: Yi Qiang
> <yqiang at jlab.org> <yqiang at jlab.org>, Baptiste Guegan <guegan at mit.edu><guegan at mit.edu>,
> Mark Dalton <dalton at jlab.org> <dalton at jlab.org>
>
>     An old ELOG entry has been updated:     Logbook: *PID_Upgrade*  Message
> ID: *10* <https://halldweb1.jlab.org/elog-halld/PID_Upgrade/10>    Entry
> time: *10/08/2013 13:00*    Author: Yi Qiang   Project: DIRC   Category:
> Simulation   Subject: HDGeant (GEANT3) Simulation of DIRC       hdds-1.5d
>
> Three files in existing hdds-1.5 has been added/modified to include a DIRC
> detector in HDGeant:
>
>    1. DIRC_HDDS.xml
>    2. main_HDDS.xml
>    3. Material_HDDS.xml
>
> At this momentum, since the detector is still preliminary, the files are
> not included in the standard Hall-D hdds release. Instead, one can check
> out these three files from:
>
> https://halldsvn.jlab.org/repos/trunk/home/yqiang/HDDS/hdds-1.5d/
>
> Two sensitive volumes used to save hits are
>
>    1. *RAWN*: DIRC window, used to save tracks entering DIRC sensitive
>    area, produces *RichTruthHit*
>    2. *RDCD*: DIRC photo-cathode, used to save photoelectrons collected
>    by the readout, produce *RichHit*
>
> The geometry of the detector follows the attached drawing. An aluminum box
> with 1mm wall thickness is used to contain the detector, and the thickness
> is derived from the effective radiation length brought by the BaBar DIRC
> package ~ 17%(total) - 14%(quartz bar) = 3%(box).
> Visualization in HDGeant++ RICH Factories in sim-recon
>
> Since rev9775, the standard Hall-D reconstruction package (*sim-recon*)
> includes the necessary RICH library to process hits in RICH window (*RAWN*)
> through DMCTrackHit factory and photo-cathode (*RDCD*) through DRichHitfactory.
>
> In order to extract all information of particles entering RICH window, a
> new factory, *DRichTruthHit*, has been added and checked in rev11686. The
> factory can be used to save all information such as: x, y, z, px, py, pz,
> t, E, track, primary and ptype:
>
> RICH library:
> https://halldsvn.jlab.org/repos/trunk/sim-recon/src/libraries/RICH/
>
> HDDM library:
> https://halldsvn.jlab.org/repos/trunk/sim-recon/src/libraries/HDDM/
> JANA Plug-in
>
> *mc_tree*:
> https://halldsvn.jlab.org/repos/trunk/sim-recon/src/programs/Analysis/plugins/mc_tree/
>
> mc_tree has been updated to use the newly created *DRichTruthHit* factory
> in rev11687.
>   ELOG V2.9.0-2411 <https://midas.psi.ch/elog/>
>
>
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>
>
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