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Question Re: Imaginary index and Absorption Length 

Forum: Processes Involving Optical Photons
Re: Question Imaginary index and Absorption Length (Nicolas Di Vara)
Re: None Re: Imaginary index and Absorption Length (Erik Dietz-Laursonn)
Re: None Re: Imaginary index and Absorption Length (Erik Dietz-Laursonn)
Date: 08 Apr, 2014
From: <cyuchiash>

Hello&#65292;dear all!

I have another question. I am simulating a surface composed by a dielectric material with really small imaginary part, and a photocathode, which is also a dielectric material, but with a non-ignorable imaginary part. That means, I have to set the complex refactive index for the photocathode to caculuate the reflectivity and the rest part of the photons should transimit through the surface into the photocathode. However, when I set the complex refrative index for the photocathode, the photons seems to disappeared once they get to the surface? The following is the tracking information. Could anyone please tell me where I did wrong?

*********************************************************************************************************
* G4Track Information:   Particle = opticalphoton,   Track ID = 1,   Parent ID = 0
*********************************************************************************************************

Step#    X(mm)    Y(mm)    Z(mm) KinE(MeV)  dE(MeV) StepLeng TrackLeng  NextVolume ProcName
    0    -39.1     46.6      247  2.95e-06        0        0         0 LiquidScintillator initStep
    1    -39.1     46.6      247  2.95e-06        0    0.001     0.001      Window CoupledTransportation
    2    -38.5     45.9      243  2.95e-06 2.95e-06        4         4 PhotoCathode CoupledTransportation

*********************************************************************************************************
* G4Track Information:   Particle = opticalphoton,   Track ID = 1,   Parent ID = 0
*********************************************************************************************************

Step#    X(mm)    Y(mm)    Z(mm) KinE(MeV)  dE(MeV) StepLeng TrackLeng  NextVolume ProcName
    0      239    -66.8     55.8  2.95e-06        0        0         0 LiquidScintillator initStep
    1      239    -66.8     55.8  2.95e-06        0    0.001     0.001      Window CoupledTransportation
    2      235    -65.7     54.9  2.95e-06 2.95e-06        4         4 PhotoCathode CoupledTransportation

*********************************************************************************************************
* G4Track Information:   Particle = opticalphoton,   Track ID = 1,   Parent ID = 0
*********************************************************************************************************

Step#    X(mm)    Y(mm)    Z(mm) KinE(MeV)  dE(MeV) StepLeng TrackLeng  NextVolume ProcName
    0     69.8     92.8      226  2.95e-06        0        0         0 LiquidScintillator initStep
    1     69.8     92.8      226  2.95e-06        0    0.001     0.001      Window CoupledTransportation
    2     68.7     91.3      222  2.95e-06 2.95e-06        4         4 PhotoCathode CoupledTransportation

*********************************************************************************************************

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