Measuring deuterium permeation through tungsten near room temperature under plasma loading using a getter layer and ion-beam based detection

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Abstract

A method to measure deuterium permeation through tungsten near room temperature under plasma loading is presented. The permeating deuterium is accumulated in a getter layer of zirconium, titanium or erbium, respectively, on the unexposed side of the sample. Subsequently, the amount of deuterium in the getter is measured ex-situ using nuclear reaction analysis. A cover layer system on the getter prevents direct loading of the getter with deuterium from the gas phase during plasma loading. In addition, it enables the distinction of deuterium in the getter and at the cover surface. The method appears promising to add additional permeation measurement capabilities to deuterium retention experiments, also in other plasma devices, without the need for a complex in-situ permeation measurement setup.

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Kapser, S., Manhard, A., & von Toussaint, U. (2017). Measuring deuterium permeation through tungsten near room temperature under plasma loading using a getter layer and ion-beam based detection. Nuclear Materials and Energy, 12, 703–708. https://doi.org/10.1016/j.nme.2016.11.019

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