[Gate-users] Optical Photon simulation

[Pietrzyk, Uwe]

Dear Emilie, dear All,

wouldn’t it be a good idea to have this modification/extension being
handled by an expert, i.e. developer knowledgeable in working with
GEANT4 / GATE and then send out to interested users with a
short advice how to make it work on an already existing installation
of GATE 8.0 …?

Many thanks and kind regards,
 
Uwe

/----------------------------------------------------------------------
Prof. Dr. Uwe Pietrzyk
Diplom-Physiker
Institut für Neurowissenschaften und Medizin / INM-4
Forschungszentrum Jülich GmbH
52425 Jülich
Tel: +49-2461-61 4763
Fax: +49-2461-61 2820
Mobil: +49-162-103-4871
eMail: U.Pietrzyk at fz-juelich.de
http://www.fz-juelich.de/inm/inm-4/DE/Home/home_node.html
&
Bergische Universität Wuppertal
Fakultät für Mathematik und Naturwissenschaften
Büro:  D.08.01
Gaußstr. 20
42097 Wuppertal
Tel: +49-(0)202-439-3523
Fax: +49-(0)202-439-2811
eMail: Uwe.Pietrzyk at uni-wuppertal.de
http://www.medizinphysik.uni-wuppertal.de
----------------------------------------------------------------------/

> On 29. Jan 2018, at 18:21, Emilie Roncali <eroncali at ucdavis.edu> wrote:
> 
> Hi Dania, 
> 
> You need to change the step size in the Geant4 Cerenkov.cc file and recompile, otherwise your secondary electrons will not have a chance to produce Cerenkov photon per step.
> 
> Happy to help you more offline.
> 
> Best,
> 
> Emilie
> 
> On Mon, Jan 29, 2018 at 2:55 AM, Dania Consuegra <dconsuegra88 at gmail.com <mailto:dconsuegra88 at gmail.com>> wrote:
> Dear gate users,
> I'm working with Gate 8 and I'm interested in generating and tracking optical photons. I attached what I have been able to do so far.
> For the case of the Scintillation process I think that I get some reasonable results in coherence with the (GateWorkshop_edu_optical_website.pdf) but for the Cherenkov process I just can generate the process and see the electrons with (PDGE=11). I do not get optical photons in this case !!!
> I'm defining the process as follows:
> /gate/physics/addProcess Cerenkov e-
> /gate/physics/addProcess Cerenkov e+
> I would like to know:
> -If there is some new physics that I can add in my macro in order to see the optical photons generated for the Cherenkov process.
> -If there is any way of define both processes (Scintillation and Cherenkov) in order to they compete among themselves at the same simulation. Now, I just comment one process when I study the other one….
> -I know I can distinguish between the photons from the source and the optical photons due to the Scintillation process but, it is possible to visualize the optical photons at the same time making a difference between the ones due to the Scintillation and the ones due to the Cherenkov process….
> -The crystals that I'm interested in studying are (PbF2 , PWO4 and leas glass). It's possible to use the LUT approach for these materials….
> At the end, my goal is to simulate a back to back source in the middle of a simple multi-optical-system (same crystal and same SiPM on both sides of the source) in order to study a coincidence time properties of the system, the efficiency and the time resolution….
> I’d be very glad and grateful for some help.
> Best regards,
> Dania Consuegra Rodríguez
> Phd student Jožef Stefan Institute
> 
> PD> Sorry if this email appears repeated to you. I got an error the first time I sent it ...
> 
> 
> 
> 
> -- 
> 
> 
> 
> 
> Emilie Roncali, Ph.D.
> Assistant Project Scientist
> Associate Editor, EJNMMI Physics
> 
> Dept. of Biomedical Engineering – GBSF 2505
> University of California, Davis
> 451 East Health Sciences Drive
> Davis, CA 95616
> Tel: (530) 754-9511
> eroncali at ucdavis.edu <mailto:eroncali at ucdavis.edu>

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