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<p class="MsoNormal">As a test, I’ve just used mcstas to simulate a very simple reflectometer with these components and created mantid nexus output<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">ISIS Source<o:p></o:p></p>
<p class="MsoNormal">Slit<o:p></o:p></p>
<p class="MsoNormal">Slit<o:p></o:p></p>
<p class="MsoNormal">monitor<o:p></o:p></p>
<p class="MsoNormal">Sample<o:p></o:p></p>
<p class="MsoNormal">Detector<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">On reading into mantid the wavelength calculation seems to work fine but the calculation of momentum transfer seems to go wrong.<o:p></o:p></p>
<p class="MsoNormal">I’ve checked that the q overlaps from the sample do what I expect by doing the conversion by hand so the simulation appears to be correct.<o:p></o:p></p>
<p class="MsoNormal">That leaves and error in the instrument definition and how theta and l2 are calculated.<o:p></o:p></p>
<p class="MsoNormal">Who is looking after this part of the interaction?<o:p></o:p></p>
<p class="MsoNormal">Do I need to talk to someone from the Mantid team or McStas.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Rob <o:p></o:p></p>
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