Message: Re: Surface Properties:how to model a diffusive (98%) and absorbing (2%) surface Not Logged In (login)
 Next-in-Thread Next-in-Thread
 Next-in-Forum Next-in-Forum

Feedback Re: Surface Properties:how to model a diffusive (98%) and absorbing (2%) surface  

Keywords: surface absorbing diffuse
Forum: Processes Involving Optical Photons
Date: 26 Jul, 2005
From: Gumplinger Peter <Gumplinger Peter>

Please, take a look at the Application Developers Manual's: Source listing 5.2.10 (for example).

You need to specify, in case of the glisur-model and dielectric_metal:

OpSurface -> SetFinish(ground); // for diffuse reflector

and just how diffuse with:

G4double polish = 0.0;

OpSurface -> SetPolish(polish);

The value 0 means maximum roughness with effective plane of reflection distributed as cos(alpha) where alpha is the angle between the unit normal to the effective plane of reflection and the normal to the nominal medium boundary. The value 1 means perfect smoothness. In between the surface is modeled as a bell-shaped distribution in alpha with limits given by:

sin(alpha) = +-(1 - value)

When the value = 0 the distribution of the normal to the surface is ~ cos(theta).

Also, the reflectivity as 0.98 for the range of frequencies in question:

OpSurfaceProperty = AddProperty("REFLECTIVITY",pp,reflectivity,NUM);

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

1 Feedback: Re: Surface Properties:how to model a diffusive (98%) and absorbing (2%) surface   (Maria Lucia - 28 Jul, 2005)
(_ Feedback: Re: Surface Properties:how to model a diffusive (98%) and absorbing (2%) surface   (Peter Gumplinger - 28 Jul, 2005)
 Add Message Add Message
to: "Re: Surface Properties:how to model a diffusive (98%) and absorbing (2%) surface "

 Subscribe Subscribe

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