Re: about muon coincidence in undreground lab

From: Stefan Roesler (
Date: Wed Jun 27 2007 - 18:39:26 CEST

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    Dear Yung-Shun,

    Your geometry contains errors. All points in BL are also contained in the
    Air-region R4. Try the following to indicate the problematic areas:

    GEOEND 1.000e+02 1.000e+02 3.000e+02-1.000e+02-1.000e+02-1.000e+01DEBUG
    GEOEND 1.000e+02 1.000e+01 1.000e+02 &


    On Wed, 27 Jun 2007, Yung-Shun Yeh wrote:

    > Dear Roesler,
    > Thanks for your reply. Sorry for my ambiguous description.
    > In my original simulation, I used a source subroutine to get primary muons.
    > For a simple case, I supposed a muon beam with energy 100GeV just at +z
    > direction (0,0,1000) shoot into the lab(the direction is -z), and the
    > detector is at center of geometry. I wish if a muon go through all of the
    > three fold layers(region RT, RM, and RB), the MuonTracker would record its
    > muon id (NCASE). But I don't know how to do this, I initially recorded the
    > informations occured in any three fold layer and liquid scinllator. It seems
    > like every muon will be recorded in all three fold layers and liquid
    > scintillator, but I only got the informations occured in liquid scinllator.
    > There is no interaction between muon and three fold layers. I don't know if
    > my configurations of geometry or others are wrong. Or better way can achieve
    > this purpose. Thank you very much.
    > Attached is correct files. In the mgdraw.f file, the code which is used to
    > take data of muon is labeled "**** Record the Muon information in specific
    > region Start ****". Thank you very much!
    > Best regards,
    > Yung-Shun
    > On 6/26/07, Stefan Roesler <> wrote:
    > >
    > > Dear Yung-Shun
    > >
    > > I am not sure that I understand your problem. After commenting out the
    > > unclosed pre-processor directive just after the ASSIGNMAT cards and
    > > commenting the SOURCE card (since you didnt send the source routine) I get
    > > entries into all three files BoundaryNeutron, MuonTracker and SRCEPART.
    > >
    > > Could you please explain your problem in more detail?
    > >
    > > Best regards
    > > Stefan
    > >
    > >
    > >

    Stefan Roesler
    CH-1211 Geneva 23
    Phone:  +41-22-7679891
    Fax:    +41-22-7669639

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