[mcstas-users] Pol_guide_vmirror

[DESERT Sylvain]

Hi,
I am trying to use the V-cavity component (Pol_guide_vmirror).
Below are the parameters of the component:
 
COMPONENT Cavite = Pol_guide_vmirror (
          xw = 0.025, yh = 0.025, 
          length = 1, 
          rPar    ={.99, 1.0*0.0219, 6.07, 1, 0.003},
          rUpPar  ={.99, 2.0*0.0219, 6.07, 1, 0.003},
          rDownPar={.99, 0.4*0.0219, 6.07, 1, 0.003}
     )   
  AT (0, 0, .501) RELATIVE previous
 
When i trace the instrument, the V wafers is shifted on the z axis (the neutron axis) by half its length.
Therefore the guide and the V's are both 1 m long with the wafers going out of the guide body.
 
I cannot figure out wether this is simply a tracing mistake or the code also misbehaves (or i badly gave the parameters - always an option!).
Any comment welcome.
Regards,
Sylvain Désert
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