Recoil energy distribution of hydrogen isotopes adsorbed on tungsten

The Prototype Material Plasma Exposure eXperiment (Proto-MPEX) is a linear plasma device being used in plasma source research and development (R&D) for the proposed MPEX. Once the R&D is completed, this device can also be used to perform plasma–material interaction studies. To perform these studies, a new materials analysis and particle probe (MAPP) has been constructed. The MAPP’s components are a sample holder and manipulator and a custom vacuum chamber with ports to facilitate surface chemistry diagnostics. The MAPP’s overall design enables rapid sample turnaround and in vacuo surface characterization. The surface analysis vacuum chamber has ports for x-ray photoelectron spectroscopy, thermal desorption spectroscopy, back-scatter ion scattering spectroscopy, forward-scatter ion scattering spectroscopy, and direct recoil spectroscopy. The sample manipulator and holder is a Lesker/UHV Multi-Centre Analytical Stage, which is used to place the samples in the exposure region of the Proto-MPEX or the analysis position in the MAPP vacuum chamber. The sample holder has a heating capability of up to 1200 °C for heated exposure and for desorption studies. In this work, we present the MAPP’s design and the first tungsten sample exposure with ex situ analysis that shows a surface deposition layer on the exposed target, highlighting the need for additional in situ measurements on the Proto-MPEX.

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Development of the materials analysis and particle probe for Proto-MPEX

Beers

Jaramillo

Reid

et al. 2021

Review of Scientific Instruments

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Experimental characterization of hydrogen adsorption sites for H/W(111) using low energy ion scattering

et al. 2019

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Channeling of low-energy ions on hydrogen-covered single-crystal surfaces

et al. 2012

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Recoil energy distribution of hydrogen isotopes adsorbed on tungsten

Cited by 3 publications

References 7 publications

Development of the materials analysis and particle probe for Proto-MPEX

Development of the materials analysis and particle probe for Proto-MPEX

Experimental characterization of hydrogen adsorption sites for H/W(111) using low energy ion scattering

Channeling of low-energy ions on hydrogen-covered single-crystal surfaces

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