[NeXus-committee] A very stupid question

[Tobias Richter]

The primary beam may not hit the detector, not even the extended detector plane. So no, the local origin sits at the first pixel.

Cheers
Tobias

Data Management Group
European Spallation Source, Lund, Sweden
________________________________
From: Eugen Wintersberger <eugen.wintersberger at desy.de>
Sent: 28 Jul 2017 14:55
To: nexus-committee at nexusformat.org
Subject: [NeXus-committee] A very stupid question

Hi folks,
  I know this sounds rather stupid but: am I right if I assume that the beam center (the location where the
primary beam hits the detector) is the origin of the detectors local coordinate frame?

Background: I am actually cleaning up my DESY internal Nexus documents including use cases for
NXtransformation and NXdetector (for different detector configurations) and while doing this I realized that I am not
sure about the definition of the origin of the detector local coordinate frame.
I already  have some nice results using NXtransformation for q-space conversion and maybe we could use
these documents, once they are finished, as cookbooks for Nexus users.

regards
  Eugen
--
Dr. Eugen Wintersberger

FS-EC
DESY
Notkestr. 85
D-22607 Hamburg
Germany

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