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Hi Helen,

We have had luck using a vacuum sealing system such as used for food. However the Polyethylene is subject to degradation under the beam so that wrapping with Kapton is helpful as well as double bagging it. Finally, if you keep it under Argon when transporting it to the beamline and then in a helium filled chamber, you should avoid the oxidation.

Carlo

Carlo Segre, Duchossois Professor of Physics

Illinois Institute of Technology

From: Helen Chen via Ifeffit <ifeffit@millenia.cars.aps.anl.gov>
Sent: Tuesday, March 18, 2025 8:05 PM
To: ifeffit@millenia.cars.aps.anl.gov <ifeffit@millenia.cars.aps.anl.gov>
Cc: Helen Chen <helen86@uw.edu>
Subject: [Ext][Ifeffit] Question about Air sensitive sample holder

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Hello,

Our group (Jerry Seidler) just started a project involving doing VTC and HERFD on Yb doped CrX3 material. They are thin small crystal sheets and are very air sensitive. We have tried encapsulated them between a layer of laptop tape and film, but after 12hr we see degradation due to air leaks. I am looking for some advice on air sensitive sample holder. What are some typical methods you use to deal with air sensitivity, especially for samples in thin sheets geometry?

Thank you

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