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<p><font size="4">Dear Steve,</font></p>
<p><font size="4">Yes, I agree with you. It would be probably
'enough' to add the fields </font><font size="4"><strong>flux </strong>and
</font><font size="4"><strong>incident_<span class="highlighted">polarization
</span></strong><span class="highlighted">of the magnetic
field </span>from NXbeam to NXsample. NXbeam is for the
incident photons.<br>
</font></p>
<p><font size="4">Regards,</font></p>
<p><font size="4"> - Fernan</font><br>
</p>
<div class="moz-cite-prefix">On 3/16/23 10:58, Collins, Steve
(DLSLtd,RAL,SCI) via NeXus wrote:<br>
</div>
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<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Dear
Fernan,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">That
sounds sensible in as far as XMCD (and XMLD) is XAS with
different values for field and/or polarization, both of
which are documented.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">We
have an issue with magnetic_field in that the possible
directions are currently very restricted. This probably
needs to be changed.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Steve<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<div>
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<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span
lang="EN-US"> NeXus
<a class="moz-txt-link-rfc2396E" href="mailto:nexus-bounces@shadow.nd.rl.ac.uk"><nexus-bounces@shadow.nd.rl.ac.uk></a>
<b>On Behalf Of </b>Fernan Saiz via NeXus<br>
<b>Sent:</b> 16 March 2023 09:37<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:nexus@nexusformat.org">nexus@nexusformat.org</a><br>
<b>Cc:</b> Fernan Saiz <a class="moz-txt-link-rfc2396E" href="mailto:fsaiz@cells.es"><fsaiz@cells.es></a><br>
<b>Subject:</b> [Nexus] Using NXxas for XMCD experiments<o:p></o:p></span></p>
</div>
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<p class="MsoNormal"><o:p> </o:p></p>
<p><span style="font-size:13.5pt">Dear Nexus community,</span><o:p></o:p></p>
<p><span style="font-size:13.5pt">I was wondering if any member
here has been used
<a
href="https://manual.nexusformat.org/classes/applications/NXxas.html"
moz-do-not-send="true">NXxas</a> for XMCD experiments
given that XMCD can be assumed to be the difference of two
XAS spectra obtained under plus and minus magnetic fields
and divided their sum. The reason behind my question is that
I see much simpler to add the information about the magnetic
field by filling out e.g.
<span class="highlighted"><b>magnetic</b></span><strong><span
style="font-family:"Calibri",sans-serif">_field
</span></strong>in the NXsample rather than coming up with
a new application definition. The former option can be also
complemented by providing information about the magnet (e.g.
NXquadrupole_magnet).
</span><o:p></o:p></p>
<p><span style="font-size:13.5pt">Any thoughts would be
welcomed.</span><o:p></o:p></p>
<p><span style="font-size:13.5pt">Sincerely,</span><o:p></o:p></p>
<div>
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<pre class="moz-quote-pre" wrap="">_______________________________________________
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