Unraveling wall conditioning effects on plasma facing components in NSTX-U with the Materials Analysis Particle Probe (MAPP)

F. Bedoya, J. P. Allain, R. Kaita, C. H. Skinner, L. Buzi, B. E. Koel

Research output: Contribution to journalArticle

Abstract

A novel Plasma Facing Components (PFCs) diagnostic, the Materials Analysis Particle Probe (MAPP), has been recently commissioned in the National Spherical Torus Experiment Upgrade (NSTX-U). MAPP is currently monitoring the chemical evolution of the PFCs in the NSTX-U lower divertor at 107 cm from the tokamak axis on a day-to-day basis. In this work, we summarize the methodology that was adopted to obtain qualitative and quantitative descriptions of the samples chemistry. Using this methodology, we were able to describe all the features in all our spectra to within a standard deviation of ±0.22 eV in position and ±248 s-1 eV in area. Additionally, we provide an example of this methodology with data of boronized ATJ graphite exposed to NSTX-U plasmas.

Original languageEnglish (US)
Article number11D403
JournalReview of Scientific Instruments
Volume87
Issue number11
DOIs
StatePublished - Nov 1 2016

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Plasmas
Experiments
methodology
probes
chemical evolution
conditioning
standard deviation
graphite
chemistry
Graphite
Monitoring

ASJC Scopus subject areas

  • Instrumentation

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Unraveling wall conditioning effects on plasma facing components in NSTX-U with the Materials Analysis Particle Probe (MAPP). / Bedoya, F.; Allain, J. P.; Kaita, R.; Skinner, C. H.; Buzi, L.; Koel, B. E.

In: Review of Scientific Instruments, Vol. 87, No. 11, 11D403, 01.11.2016.

Research output: Contribution to journalArticle

Bedoya, F.; Allain, J. P.; Kaita, R.; Skinner, C. H.; Buzi, L.; Koel, B. E. / Unraveling wall conditioning effects on plasma facing components in NSTX-U with the Materials Analysis Particle Probe (MAPP).

In: Review of Scientific Instruments, Vol. 87, No. 11, 11D403, 01.11.2016.

Research output: Contribution to journalArticle

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