Message: Re: photoelctrons ??? Not Logged In (login)
 Next-in-Thread Next-in-Thread
 Next-in-Forum Next-in-Forum

Feedback Re: photoelctrons ??? 

Forum: Processes Involving Optical Photons
Re: None photoelctrons ??? (Davinder Siwal)
Re: Disagree Re: photoelctrons ??? (Gumplinger Peter)
Re: None Re: photoelctrons ??? (Davinder Siwal)
Re: Feedback Re: photoelctrons ??? (Gumplinger Peter)
Re: None Re: photoelctrons ??? (Davinder Siwal)
Date: 20 Jan, 2011
From: Gumplinger Peter <Gumplinger Peter>

I gather from a private email you sent me that you have now understood the geometry and that the glass is simply a layer between the photo-cathode and your scintillator volume (entrance-window).

As for your second question, I assume you've modeled your code following the LXe example and you therefore have a ProcessHits_constStep method which triggers a G4-Hit when the photon hits your photo-cathode. In order for you to find the local coordinates of the point where the photon hits the cathode, you'll need code provided in the wls-example; specifically:

G4ThreeVector photonArrive = thePostPoint -> GetPosition();

G4TouchableHistory* theTouchable
      = (G4TouchableHistory*)(thePostPoint->GetTouchable());

// Convert the global coordinate for arriving photons into // the local coordinate of the detector

photonArrive = theTouchable->GetHistory()->
                              GetTopTransform().TransformPoint(photonArrive);

see:

http://www-geant4.kek.jp/lxr/source/examples/extended/optical/wls/src/WLSPhotonDetSD.cc#L93

Please, do your research - for example, the answer to your question can be found at:

http://geant4.web.cern.ch/geant4/support/faq.shtml#a-geom-4

Inline Depth:
 1 1
 All All
Outline Depth:
 1 1
 2 2
 All All
Add message: (add)

1 None: Re: photoelctrons ???   (Davinder Siwal - 20 Jan, 2011)
 Add Message Add Message
to: "Re: photoelctrons ???"

 Subscribe Subscribe

This site runs SLAC HyperNews version 1.11-slac-98, derived from the original HyperNews