[mcstas-users] bugs for Monochromator_curved.comp and Guide_tapering.comp

[Klaus Habicht]

Dear all,

I believe there is a bug in Monochromator_curved.comp:

Executing mcdisplay on an instrument with Monochromator_curved.comp 
gives incident trajectories which all end at the middle monochromator 
blade. Outgoing trajectories seem to be correct since they emerge from 
the whole assembly.

I believe there is a bug in Guide_tapering.comp:

The calculated exit width (a parameter called "Weigth at the guide exit 
(w2)" in my case 0.022288) is wrong. For the example:

COMPONENT Elliptically_Tapered_Guide = Guide_tapering(
     option = "elliptical", segno = 100, w1 = WGUIDE, h1 = 0.125,
     l = 2.5, linw = 10000, loutw = 0.4, linh = 10000, louth = 10000)
   AT (0, 0, 0) RELATIVE NL1B_Elliptical_Entrance_Window ROTATED (0, 0, 
0) RELATIVE NL1B_Elliptical_Entrance_Window

the analytical formula gives 0.0304 m for the exit width.

With best regards,
Klaus Habicht



------------------------------------------------------------------
Dr. Klaus Habicht
Helmholtz-Zentrum Berlin für Materialien und Energie
SF1 Methods and Instruments
Glienicker Strasse 100
D-14109 Berlin
Germany
Phone    office +49 30 8062 2807
      instrument +49 30 8062 3122
Fax             +49 30 8062 3094


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