Diagnostic exploitation of complex heavy elements in tokamak plasmas

M.G. O'Mullane, H.P. Summers, A.D. Whiteford, R. Barnsley, I.H. Coffey, G. Counsell, S. Loch

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

In future burning plasma experiments, a promising method for the diagnosis of first wall erosion is to detect the onset of emission from nonintrinsic materials embedded in the plasma facing components as they are revealed and enter the confined plasma. Likely high Z species were introduced into the Joint European Torus plasmas by laser ablation. Results from targets of single species (W and Hf) and dual species (W/Hf composite) are presented. The composite target experiment has shown that it is possible to distinguish reliably between emission from near neighbor heavy elements, even with instrument resolutions of /~0.001. Forward prediction to power plant conditions necessitates a model of the complex spectra and a system for generating the required atomic data and producing spectral feature emissivity coefficients is described. An important consideration is to enable exploration of different instrumentation so the spectral resolution of the compound features are tuned to the diagnostic capability.
LanguageEnglish
Pages2080-2083
Number of pages3
JournalReview of Scientific Instruments
Volume74
Issue number3
DOIs
Publication statusPublished - Mar 2003

Fingerprint

heavy elements
exploitation
Plasmas
Joint European Torus
composite materials
Spectral resolution
Composite materials
Laser ablation
power plants
emissivity
spectral resolution
laser ablation
erosion
Erosion
Power plants
Experiments
coefficients
predictions

Keywords

  • instruments and instrumentation
  • applied physics
  • tungsten
  • plasma

Cite this

O'Mullane, M.G. ; Summers, H.P. ; Whiteford, A.D. ; Barnsley, R. ; Coffey, I.H. ; Counsell, G. ; Loch, S. / Diagnostic exploitation of complex heavy elements in tokamak plasmas. In: Review of Scientific Instruments. 2003 ; Vol. 74, No. 3. pp. 2080-2083.
@article{5274ce94b7a541d98ee6e234435d8df8,
title = "Diagnostic exploitation of complex heavy elements in tokamak plasmas",
abstract = "In future burning plasma experiments, a promising method for the diagnosis of first wall erosion is to detect the onset of emission from nonintrinsic materials embedded in the plasma facing components as they are revealed and enter the confined plasma. Likely high Z species were introduced into the Joint European Torus plasmas by laser ablation. Results from targets of single species (W and Hf) and dual species (W/Hf composite) are presented. The composite target experiment has shown that it is possible to distinguish reliably between emission from near neighbor heavy elements, even with instrument resolutions of /~0.001. Forward prediction to power plant conditions necessitates a model of the complex spectra and a system for generating the required atomic data and producing spectral feature emissivity coefficients is described. An important consideration is to enable exploration of different instrumentation so the spectral resolution of the compound features are tuned to the diagnostic capability.",
keywords = "instruments and instrumentation, applied physics, tungsten, plasma",
author = "M.G. O'Mullane and H.P. Summers and A.D. Whiteford and R. Barnsley and I.H. Coffey and G. Counsell and S. Loch",
year = "2003",
month = "3",
doi = "10.1063/1.1537040",
language = "English",
volume = "74",
pages = "2080--2083",
journal = "Review of Scientific Instruments",
issn = "0034-6748",
number = "3",

}

O'Mullane, MG, Summers, HP, Whiteford, AD, Barnsley, R, Coffey, IH, Counsell, G & Loch, S 2003, 'Diagnostic exploitation of complex heavy elements in tokamak plasmas' Review of Scientific Instruments, vol. 74, no. 3, pp. 2080-2083. https://doi.org/10.1063/1.1537040

Diagnostic exploitation of complex heavy elements in tokamak plasmas. / O'Mullane, M.G.; Summers, H.P.; Whiteford, A.D.; Barnsley, R.; Coffey, I.H.; Counsell, G.; Loch, S.

In: Review of Scientific Instruments, Vol. 74, No. 3, 03.2003, p. 2080-2083.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Diagnostic exploitation of complex heavy elements in tokamak plasmas

AU - O'Mullane, M.G.

AU - Summers, H.P.

AU - Whiteford, A.D.

AU - Barnsley, R.

AU - Coffey, I.H.

AU - Counsell, G.

AU - Loch, S.

PY - 2003/3

Y1 - 2003/3

N2 - In future burning plasma experiments, a promising method for the diagnosis of first wall erosion is to detect the onset of emission from nonintrinsic materials embedded in the plasma facing components as they are revealed and enter the confined plasma. Likely high Z species were introduced into the Joint European Torus plasmas by laser ablation. Results from targets of single species (W and Hf) and dual species (W/Hf composite) are presented. The composite target experiment has shown that it is possible to distinguish reliably between emission from near neighbor heavy elements, even with instrument resolutions of /~0.001. Forward prediction to power plant conditions necessitates a model of the complex spectra and a system for generating the required atomic data and producing spectral feature emissivity coefficients is described. An important consideration is to enable exploration of different instrumentation so the spectral resolution of the compound features are tuned to the diagnostic capability.

AB - In future burning plasma experiments, a promising method for the diagnosis of first wall erosion is to detect the onset of emission from nonintrinsic materials embedded in the plasma facing components as they are revealed and enter the confined plasma. Likely high Z species were introduced into the Joint European Torus plasmas by laser ablation. Results from targets of single species (W and Hf) and dual species (W/Hf composite) are presented. The composite target experiment has shown that it is possible to distinguish reliably between emission from near neighbor heavy elements, even with instrument resolutions of /~0.001. Forward prediction to power plant conditions necessitates a model of the complex spectra and a system for generating the required atomic data and producing spectral feature emissivity coefficients is described. An important consideration is to enable exploration of different instrumentation so the spectral resolution of the compound features are tuned to the diagnostic capability.

KW - instruments and instrumentation

KW - applied physics

KW - tungsten

KW - plasma

UR - http://dx.doi.org/10.1063/1.1537040

U2 - 10.1063/1.1537040

DO - 10.1063/1.1537040

M3 - Article

VL - 74

SP - 2080

EP - 2083

JO - Review of Scientific Instruments

T2 - Review of Scientific Instruments

JF - Review of Scientific Instruments

SN - 0034-6748

IS - 3

ER -