The materials analysis patticle probe (MAPP) diagnostic system in NSTX

Bryan Heim, S. Gonderman, C. N. Taylor, J. P. Allain, Z. C. Yang, M. Gonzalez, E. Collins, C. H. Skinner, B. Ellis, W. Blanchard, L. Roquemore, H. W. Kugel, R. Martin

Research output: ResearchConference contribution

Abstract

Lithium conditioning of plasma-facing surfaces (PFS) has been implemented in NSTX leading to improvements in plasma performance such as reduced D recycling and a reduction in edge localized modes (ELMS). Analysis of post-mortem tiles and offline experiments has identified interactions between Li-O-D and Li-C-D as chemical channels for deuterium retention in ATJ graphite. MAPP is the first in-vacuo surface analysis diagnostic directly integrated into a tokamak and capable of shot-to-shot chemical surface analysis of plasma material interactions (PMI). X-ray photoelectron spectroscopy (XPS) and low energy ion surface spectroscopy (LEISS) can show the chemical functionalities between D and lithiated graphite at both the near surface (5-10 nm) and top surface layer (0.3-0.6 nm) for XPS and LEISS respectively. MAPP will correlate plasma facing component (PFC) surface chemistry with plasma performance to lead the way to improved understanding of plasma-surface interactions and their effect on global plasma performance. Remote operation and data acquisition, integrated into NSTX diagnostic and interlocks, make MAPP an advanced PMI diagnostic with stringent engineering constraints.

LanguageEnglish (US)
Title of host publication2011 IEEE/NPSS 24th Symposium on Fusion Engineering, SOFE 2011
DOIs
StatePublished - 2011
Event2011 IEEE/NPSS 24th Symposium on Fusion Engineering, SOFE 2011 - Chicago, IL, United States
Duration: Jun 26 2011Jun 30 2011

Other

Other2011 IEEE/NPSS 24th Symposium on Fusion Engineering, SOFE 2011
CountryUnited States
CityChicago, IL
Period6/26/116/30/11

Fingerprint

probes
Plasmas
interactions
Beam plasma interactions
shot
graphite
photoelectron spectroscopy
spectroscopy
ions
x rays
energy
Plasma diagnostics
Surface analysis
Graphite
Spectroscopy
tiles
conditioning
recycling
surface reactions
data acquisition

Keywords

  • lithiated graphite
  • plasma material interactions
  • plasma surface interations

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering

Cite this

Heim, B., Gonderman, S., Taylor, C. N., Allain, J. P., Yang, Z. C., Gonzalez, M., ... Martin, R. (2011). The materials analysis patticle probe (MAPP) diagnostic system in NSTX. In 2011 IEEE/NPSS 24th Symposium on Fusion Engineering, SOFE 2011 [6052303] DOI: 10.1109/SOFE.2011.6052303

The materials analysis patticle probe (MAPP) diagnostic system in NSTX. / Heim, Bryan; Gonderman, S.; Taylor, C. N.; Allain, J. P.; Yang, Z. C.; Gonzalez, M.; Collins, E.; Skinner, C. H.; Ellis, B.; Blanchard, W.; Roquemore, L.; Kugel, H. W.; Martin, R.

2011 IEEE/NPSS 24th Symposium on Fusion Engineering, SOFE 2011. 2011. 6052303.

Research output: ResearchConference contribution

Heim, B, Gonderman, S, Taylor, CN, Allain, JP, Yang, ZC, Gonzalez, M, Collins, E, Skinner, CH, Ellis, B, Blanchard, W, Roquemore, L, Kugel, HW & Martin, R 2011, The materials analysis patticle probe (MAPP) diagnostic system in NSTX. in 2011 IEEE/NPSS 24th Symposium on Fusion Engineering, SOFE 2011., 6052303, 2011 IEEE/NPSS 24th Symposium on Fusion Engineering, SOFE 2011, Chicago, IL, United States, 6/26/11. DOI: 10.1109/SOFE.2011.6052303
Heim B, Gonderman S, Taylor CN, Allain JP, Yang ZC, Gonzalez M et al. The materials analysis patticle probe (MAPP) diagnostic system in NSTX. In 2011 IEEE/NPSS 24th Symposium on Fusion Engineering, SOFE 2011. 2011. 6052303. Available from, DOI: 10.1109/SOFE.2011.6052303
Heim, Bryan ; Gonderman, S. ; Taylor, C. N. ; Allain, J. P. ; Yang, Z. C. ; Gonzalez, M. ; Collins, E. ; Skinner, C. H. ; Ellis, B. ; Blanchard, W. ; Roquemore, L. ; Kugel, H. W. ; Martin, R./ The materials analysis patticle probe (MAPP) diagnostic system in NSTX. 2011 IEEE/NPSS 24th Symposium on Fusion Engineering, SOFE 2011. 2011.
@inbook{32bcf6bbf9ca4c6bb6563283371f07f7,
title = "The materials analysis patticle probe (MAPP) diagnostic system in NSTX",
abstract = "Lithium conditioning of plasma-facing surfaces (PFS) has been implemented in NSTX leading to improvements in plasma performance such as reduced D recycling and a reduction in edge localized modes (ELMS). Analysis of post-mortem tiles and offline experiments has identified interactions between Li-O-D and Li-C-D as chemical channels for deuterium retention in ATJ graphite. MAPP is the first in-vacuo surface analysis diagnostic directly integrated into a tokamak and capable of shot-to-shot chemical surface analysis of plasma material interactions (PMI). X-ray photoelectron spectroscopy (XPS) and low energy ion surface spectroscopy (LEISS) can show the chemical functionalities between D and lithiated graphite at both the near surface (5-10 nm) and top surface layer (0.3-0.6 nm) for XPS and LEISS respectively. MAPP will correlate plasma facing component (PFC) surface chemistry with plasma performance to lead the way to improved understanding of plasma-surface interactions and their effect on global plasma performance. Remote operation and data acquisition, integrated into NSTX diagnostic and interlocks, make MAPP an advanced PMI diagnostic with stringent engineering constraints.",
keywords = "lithiated graphite, plasma material interactions, plasma surface interations",
author = "Bryan Heim and S. Gonderman and Taylor, {C. N.} and Allain, {J. P.} and Yang, {Z. C.} and M. Gonzalez and E. Collins and Skinner, {C. H.} and B. Ellis and W. Blanchard and L. Roquemore and Kugel, {H. W.} and R. Martin",
year = "2011",
doi = "10.1109/SOFE.2011.6052303",
isbn = "9781457706691",
booktitle = "2011 IEEE/NPSS 24th Symposium on Fusion Engineering, SOFE 2011",

}

TY - CHAP

T1 - The materials analysis patticle probe (MAPP) diagnostic system in NSTX

AU - Heim,Bryan

AU - Gonderman,S.

AU - Taylor,C. N.

AU - Allain,J. P.

AU - Yang,Z. C.

AU - Gonzalez,M.

AU - Collins,E.

AU - Skinner,C. H.

AU - Ellis,B.

AU - Blanchard,W.

AU - Roquemore,L.

AU - Kugel,H. W.

AU - Martin,R.

PY - 2011

Y1 - 2011

N2 - Lithium conditioning of plasma-facing surfaces (PFS) has been implemented in NSTX leading to improvements in plasma performance such as reduced D recycling and a reduction in edge localized modes (ELMS). Analysis of post-mortem tiles and offline experiments has identified interactions between Li-O-D and Li-C-D as chemical channels for deuterium retention in ATJ graphite. MAPP is the first in-vacuo surface analysis diagnostic directly integrated into a tokamak and capable of shot-to-shot chemical surface analysis of plasma material interactions (PMI). X-ray photoelectron spectroscopy (XPS) and low energy ion surface spectroscopy (LEISS) can show the chemical functionalities between D and lithiated graphite at both the near surface (5-10 nm) and top surface layer (0.3-0.6 nm) for XPS and LEISS respectively. MAPP will correlate plasma facing component (PFC) surface chemistry with plasma performance to lead the way to improved understanding of plasma-surface interactions and their effect on global plasma performance. Remote operation and data acquisition, integrated into NSTX diagnostic and interlocks, make MAPP an advanced PMI diagnostic with stringent engineering constraints.

AB - Lithium conditioning of plasma-facing surfaces (PFS) has been implemented in NSTX leading to improvements in plasma performance such as reduced D recycling and a reduction in edge localized modes (ELMS). Analysis of post-mortem tiles and offline experiments has identified interactions between Li-O-D and Li-C-D as chemical channels for deuterium retention in ATJ graphite. MAPP is the first in-vacuo surface analysis diagnostic directly integrated into a tokamak and capable of shot-to-shot chemical surface analysis of plasma material interactions (PMI). X-ray photoelectron spectroscopy (XPS) and low energy ion surface spectroscopy (LEISS) can show the chemical functionalities between D and lithiated graphite at both the near surface (5-10 nm) and top surface layer (0.3-0.6 nm) for XPS and LEISS respectively. MAPP will correlate plasma facing component (PFC) surface chemistry with plasma performance to lead the way to improved understanding of plasma-surface interactions and their effect on global plasma performance. Remote operation and data acquisition, integrated into NSTX diagnostic and interlocks, make MAPP an advanced PMI diagnostic with stringent engineering constraints.

KW - lithiated graphite

KW - plasma material interactions

KW - plasma surface interations

UR - http://www.scopus.com/inward/record.url?scp=80955168054&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=80955168054&partnerID=8YFLogxK

U2 - 10.1109/SOFE.2011.6052303

DO - 10.1109/SOFE.2011.6052303

M3 - Conference contribution

SN - 9781457706691

BT - 2011 IEEE/NPSS 24th Symposium on Fusion Engineering, SOFE 2011

ER -