[Neutron] Webinar 26 June on NSE by Bela Farago

[Karin Griewatsch]

Dear colleagues,

you are welcome to the KFN Neutron Webinar by Bela Farago on


  *Everything You Always Wanted to Know About NSE But Were Afraid to Ask*

*
*


  Dr. Bela Farago
  ILL

*Friday, 26 June 2026, 11:00 - 12:00 CET
*
**Zoom link: 
*https://fz-juelich-de.zoom-x.de/j/62148526545?pwd=Yba5kbbQAYKSUdwK0X7xAcP5x0LEKI.1
<https://fz-juelich-de.zoom-x.de/j/62148526545?pwd=Yba5kbbQAYKSUdwK0X7xAcP5x0LEKI.1>*Meeting 
ID: 621 4852 6545
Passcode: 047358

Neutron Spin Echo (NSE) is a relatively "new" neutron spectroscopy 
technique, if we consider the 1980-s as recent years... It is however 
undeniable, that for a long time there was only one instrument available 
for users, thus few of them had a chance to gain some experience with 
it. In addition, it is measuring this obscure S(q,t) rather than the 
very friendly S(q,omega) as all the other neutron spectroscopy 
instruments. During experiment nothing appears to move, but only 20+ 
currents are changing all the time for mystical reasons, that only few 
wizards pretend to understand.

Part of this presentation will be devoted to demystify this process, 
with the purpose not to transform you into a wizard, but convince you, 
that this is a rational exercise, and with time you would be able to 
become a wizard. But you do not have to. Luckily the number of NSE 
instruments increased substantially and thanks to technological 
developments, and may be to some mental efforts, their performance did 
the same, so access to S(q,t) is open to a wider community with higher 
precision and higher throughput. NSE inherently uses polarised neutrons. 
In the second part of the presentation, I will go through from simple to 
more involved examples, what advantages and disadvantages you might 
have. How to approach the interpretation and how best connect with our 
beloved S(q,omega) friends. For easier understanding it might be useful 
for the audience to review at least partly the recent webinar by Ross 
Stewart 
<https://videoportal.rz.uni-kiel.de/Mediasite/Play/97053828ca1f4130a2668101ff2fbe241d> with 
and excellent overview of coherent-incoherent scattering and polarised 
neutrons.

The lecture will be recorded, and there is information on data 
protection at 
https://www.sni-portal.de/en/files/kfn-neutron-webinar-data-protection 
<https://www.sni-portal.de/en/files/kfn-neutron-webinar-data-protection>

On the 
websitehttps://www.sni-portal.de/en/user-committees/committee-research-with-neutrons/neutron-webinar 
<https://www.sni-portal.de/en/user-committees/committee-research-with-neutrons/neutron-webinar>you 
will find announcements of upcoming lectures.

Kind regards,

Karin Griewatsch (KFN PR)
Thomas Hellweg (KFN chair)
Frank Schreiber and Thomas Gutberlet (Webinar organization)
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