Message: Re: Question about the photocathode simulation and how to Detect the photon? Not Logged In (login)
 Next-in-Thread Next-in-Thread
 Next-in-Forum Next-in-Forum

Feedback Re: Question about the photocathode simulation and how to Detect the photon? 

Forum: Processes Involving Optical Photons
Re: Question Question about the photocathode simulation and how to Detect the photon? (Xiaodong Zhang)
Re: More Re: Question about the photocathode simulation and how to Detect the photon? (Xiaodong Zhang)
Re: Warning Re: Question about the photocathode simulation and how to Detect the photon? (Gumplinger Peter)
Re: None Re: Question about the photocathode simulation and how to Detect the photon? (Xiaodong Zhang)
Re: None Re: Question about the photocathode simulation and how to Detect the photon? (Xiaodong Zhang)
Date: 03 Apr, 2012
From: Gumplinger Peter <Gumplinger Peter>

Dear Xiaodong,

> I can not get the detected photons, because I detected them in the
> photocathode volume. I changed to do it in the PMT windows volume, the
> problem is solved.

I don't understand ... if you followed the LXe example, you should get the boundary status 'Detection' only when the photon is absorbed at your metalic photocathode surface, with a probability set by your efficiency. A photon can reflect off the PMT window at which point is should not be considered as being detected. In theory, it can also enter the glass and be absorbed in it before hitting the photocathode.

The thing is that the conventional definition of a 'sensitive volume' does not work for this kind of 'detector' because the photon never actually goes "into" the metalic photocathode. Therefore, you need to code the call to ProcessHits in your SteppingAction.

> By the way, if you have time, could you please give me the definition of
> local normal and global normal, right now, I am still not quit clear
> about them.

See my other reply.

Peter

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

1 None: Re: Question about the photocathode simulation and how to Detect the photon?   (Xiaodong Zhang - 06 Apr, 2012)
 Add Message Add Message
to: "Re: Question about the photocathode simulation and how to Detect the photon?"

 Subscribe Subscribe

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