Observation of non-Maxwellian electron distributions in the NSTX divertor

M. A. Jaworski; M. G. Bell; T. K. Gray; R. Kaita; I. Kaganovich; J. Kallman; H. W. Kugel; B. LeBlanc; A. G. McLean; S. A. Sabbagh; F. Scotti; V. A. Soukhanovskii; D. P. Stotler

doi:10.1016/j.jnucmat.2013.01.076

Observation of non-Maxwellian electron distributions in the NSTX divertor

M. A. Jaworski, M. G. Bell, T. K. Gray, R. Kaita, I. Kaganovich, J. Kallman, H. W. Kugel, B. LeBlanc, A. G. McLean, S. A. Sabbagh, F. Scotti, V. A. Soukhanovskii, D. P. Stotler

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

The scrape-off layer plasma at the tokamak region is characterized by open field lines and often contains large variations in plasma properties along these field-lines. Proper characterization of local plasma conditions is critical to assessing plasma-material interaction processes occurring at the target. Langmuir probes are frequently employed in tokamak divertors but are challenging to interpretation. A kinetic interpretation for Langmuir probes in NSTX has yielded non-Maxwellian electron distributions in the divertor characterized by cool bulk populations and energetic tail populations with temperatures of 2-4 times the bulk. Spectroscopic analysis and modeling confirms the bulk plasma temperature and density which can only be obtained with the kinetic interpretation.

Original language	English (US)
Pages (from-to)	S384-S387
Journal	Journal of Nuclear Materials
Volume	438
Issue number	SUPPL
DOIs	https://doi.org/10.1016/j.jnucmat.2013.01.076
State	Published - 2013

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
General Materials Science
Nuclear Energy and Engineering

Access to Document

10.1016/j.jnucmat.2013.01.076

Cite this

Jaworski, M. A., Bell, M. G., Gray, T. K., Kaita, R., Kaganovich, I., Kallman, J., Kugel, H. W., LeBlanc, B., McLean, A. G., Sabbagh, S. A., Scotti, F., Soukhanovskii, V. A., & Stotler, D. P. (2013). Observation of non-Maxwellian electron distributions in the NSTX divertor. Journal of Nuclear Materials, 438(SUPPL), S384-S387. https://doi.org/10.1016/j.jnucmat.2013.01.076

@article{ce496ab7b56c455ea19a20975f6555b2,

title = "Observation of non-Maxwellian electron distributions in the NSTX divertor",

abstract = "The scrape-off layer plasma at the tokamak region is characterized by open field lines and often contains large variations in plasma properties along these field-lines. Proper characterization of local plasma conditions is critical to assessing plasma-material interaction processes occurring at the target. Langmuir probes are frequently employed in tokamak divertors but are challenging to interpretation. A kinetic interpretation for Langmuir probes in NSTX has yielded non-Maxwellian electron distributions in the divertor characterized by cool bulk populations and energetic tail populations with temperatures of 2-4 times the bulk. Spectroscopic analysis and modeling confirms the bulk plasma temperature and density which can only be obtained with the kinetic interpretation.",

author = "Jaworski, \{M. A.\} and Bell, \{M. G.\} and Gray, \{T. K.\} and R. Kaita and I. Kaganovich and J. Kallman and Kugel, \{H. W.\} and B. LeBlanc and McLean, \{A. G.\} and Sabbagh, \{S. A.\} and F. Scotti and Soukhanovskii, \{V. A.\} and Stotler, \{D. P.\}",

year = "2013",

doi = "10.1016/j.jnucmat.2013.01.076",

language = "English (US)",

volume = "438",

pages = "S384--S387",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

publisher = "Elsevier B.V.",

number = "SUPPL",

}

TY - JOUR

T1 - Observation of non-Maxwellian electron distributions in the NSTX divertor

AU - Jaworski, M. A.

AU - Bell, M. G.

AU - Gray, T. K.

AU - Kaita, R.

AU - Kaganovich, I.

AU - Kallman, J.

AU - Kugel, H. W.

AU - LeBlanc, B.

AU - McLean, A. G.

AU - Sabbagh, S. A.

AU - Scotti, F.

AU - Soukhanovskii, V. A.

AU - Stotler, D. P.

PY - 2013

Y1 - 2013

N2 - The scrape-off layer plasma at the tokamak region is characterized by open field lines and often contains large variations in plasma properties along these field-lines. Proper characterization of local plasma conditions is critical to assessing plasma-material interaction processes occurring at the target. Langmuir probes are frequently employed in tokamak divertors but are challenging to interpretation. A kinetic interpretation for Langmuir probes in NSTX has yielded non-Maxwellian electron distributions in the divertor characterized by cool bulk populations and energetic tail populations with temperatures of 2-4 times the bulk. Spectroscopic analysis and modeling confirms the bulk plasma temperature and density which can only be obtained with the kinetic interpretation.

AB - The scrape-off layer plasma at the tokamak region is characterized by open field lines and often contains large variations in plasma properties along these field-lines. Proper characterization of local plasma conditions is critical to assessing plasma-material interaction processes occurring at the target. Langmuir probes are frequently employed in tokamak divertors but are challenging to interpretation. A kinetic interpretation for Langmuir probes in NSTX has yielded non-Maxwellian electron distributions in the divertor characterized by cool bulk populations and energetic tail populations with temperatures of 2-4 times the bulk. Spectroscopic analysis and modeling confirms the bulk plasma temperature and density which can only be obtained with the kinetic interpretation.

UR - https://www.scopus.com/pages/publications/84885468869

UR - https://www.scopus.com/inward/citedby.url?scp=84885468869&partnerID=8YFLogxK

U2 - 10.1016/j.jnucmat.2013.01.076

DO - 10.1016/j.jnucmat.2013.01.076

M3 - Article

AN - SCOPUS:84885468869

SN - 0022-3115

VL - 438

SP - S384-S387

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

IS - SUPPL

ER -

Observation of non-Maxwellian electron distributions in the NSTX divertor

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this