Transition to ELM-free improved H-mode by lithium deposition on NSTX graphite divertor surfaces

D. K. Mansfield; H. W. Kugel; R. Maingi; M. G. Bell; R. Bell; R. Kaita; J. Kallman; S. Kaye; B. LeBlanc; D. Mueller; S. Paul; R. Raman; L. Roquemore; S. Sabbagh; H. Schneider; C. H. Skinner; V. Soukhanovskii; J. Timberlake; J. Wilgen; L. Zakharov

doi:10.1016/j.jnucmat.2009.01.203

Transition to ELM-free improved H-mode by lithium deposition on NSTX graphite divertor surfaces

D. K. Mansfield
, H. W. Kugel
, R. Maingi
, M. G. Bell
, R. Bell
, R. Kaita
, J. Kallman
, S. Kaye
, B. LeBlanc
, D. Mueller
, S. Paul
, R. Raman
, L. Roquemore
, S. Sabbagh
, H. Schneider
, C. H. Skinner
, V. Soukhanovskii
, J. Timberlake
, J. Wilgen
, L. Zakharov

PPPL NSTX

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

78 Scopus citations

Abstract

Lithium evaporated onto plasma facing components in the NSTX lower divertor has made dramatic improvements in discharge performance. As lithium accumulated, plasmas previously exhibiting robust Type 1 ELMs gradually transformed into discharges with intermittent ELMs and finally into continuously evolving ELM-free discharges. During this sequence, other discharge parameters changed in a complicated manner. As the ELMs disappeared, energy confinement improved and remarkable changes in edge and scrape-off layer plasma properties were observed. These results demonstrate that active modification of plasma surface interactions can preempt large ELMs.

Original language	English (US)
Pages (from-to)	764-767
Number of pages	4
Journal	Journal of Nuclear Materials
Volume	390-391
Issue number	1
DOIs	https://doi.org/10.1016/j.jnucmat.2009.01.203
State	Published - Jun 15 2009

All Science Journal Classification (ASJC) codes

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

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10.1016/j.jnucmat.2009.01.203

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Mansfield, D. K., Kugel, H. W., Maingi, R., Bell, M. G., Bell, R., Kaita, R., Kallman, J., Kaye, S., LeBlanc, B., Mueller, D., Paul, S., Raman, R., Roquemore, L., Sabbagh, S., Schneider, H., Skinner, C. H., Soukhanovskii, V., Timberlake, J., Wilgen, J., & Zakharov, L. (2009). Transition to ELM-free improved H-mode by lithium deposition on NSTX graphite divertor surfaces. Journal of Nuclear Materials, 390-391(1), 764-767. https://doi.org/10.1016/j.jnucmat.2009.01.203

@article{e1465e4eeb924be29ef92d78870d7c5c,

title = "Transition to ELM-free improved H-mode by lithium deposition on NSTX graphite divertor surfaces",

abstract = "Lithium evaporated onto plasma facing components in the NSTX lower divertor has made dramatic improvements in discharge performance. As lithium accumulated, plasmas previously exhibiting robust Type 1 ELMs gradually transformed into discharges with intermittent ELMs and finally into continuously evolving ELM-free discharges. During this sequence, other discharge parameters changed in a complicated manner. As the ELMs disappeared, energy confinement improved and remarkable changes in edge and scrape-off layer plasma properties were observed. These results demonstrate that active modification of plasma surface interactions can preempt large ELMs.",

author = "Mansfield, \{D. K.\} and Kugel, \{H. W.\} and R. Maingi and Bell, \{M. G.\} and R. Bell and R. Kaita and J. Kallman and S. Kaye and B. LeBlanc and D. Mueller and S. Paul and R. Raman and L. Roquemore and S. Sabbagh and H. Schneider and Skinner, \{C. H.\} and V. Soukhanovskii and J. Timberlake and J. Wilgen and L. Zakharov",

year = "2009",

month = jun,

day = "15",

doi = "10.1016/j.jnucmat.2009.01.203",

language = "English (US)",

volume = "390-391",

pages = "764--767",

journal = "Journal of Nuclear Materials",

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Mansfield, DK, Kugel, HW, Maingi, R, Bell, MG, Bell, R, Kaita, R, Kallman, J, Kaye, S , LeBlanc, B, Mueller, D, Paul, S, Raman, R, Roquemore, L, Sabbagh, S, Schneider, H, Skinner, CH, Soukhanovskii, V, Timberlake, J, Wilgen, J & Zakharov, L 2009, 'Transition to ELM-free improved H-mode by lithium deposition on NSTX graphite divertor surfaces', Journal of Nuclear Materials, vol. 390-391, no. 1, pp. 764-767. https://doi.org/10.1016/j.jnucmat.2009.01.203

TY - JOUR

T1 - Transition to ELM-free improved H-mode by lithium deposition on NSTX graphite divertor surfaces

AU - Mansfield, D. K.

AU - Kugel, H. W.

AU - Maingi, R.

AU - Bell, M. G.

AU - Bell, R.

AU - Kaita, R.

AU - Kallman, J.

AU - Kaye, S.

AU - LeBlanc, B.

AU - Mueller, D.

AU - Paul, S.

AU - Raman, R.

AU - Roquemore, L.

AU - Sabbagh, S.

AU - Schneider, H.

AU - Skinner, C. H.

AU - Soukhanovskii, V.

AU - Timberlake, J.

AU - Wilgen, J.

AU - Zakharov, L.

PY - 2009/6/15

Y1 - 2009/6/15

N2 - Lithium evaporated onto plasma facing components in the NSTX lower divertor has made dramatic improvements in discharge performance. As lithium accumulated, plasmas previously exhibiting robust Type 1 ELMs gradually transformed into discharges with intermittent ELMs and finally into continuously evolving ELM-free discharges. During this sequence, other discharge parameters changed in a complicated manner. As the ELMs disappeared, energy confinement improved and remarkable changes in edge and scrape-off layer plasma properties were observed. These results demonstrate that active modification of plasma surface interactions can preempt large ELMs.

AB - Lithium evaporated onto plasma facing components in the NSTX lower divertor has made dramatic improvements in discharge performance. As lithium accumulated, plasmas previously exhibiting robust Type 1 ELMs gradually transformed into discharges with intermittent ELMs and finally into continuously evolving ELM-free discharges. During this sequence, other discharge parameters changed in a complicated manner. As the ELMs disappeared, energy confinement improved and remarkable changes in edge and scrape-off layer plasma properties were observed. These results demonstrate that active modification of plasma surface interactions can preempt large ELMs.

UR - https://www.scopus.com/pages/publications/67349109139

UR - https://www.scopus.com/pages/publications/67349109139#tab=citedBy

U2 - 10.1016/j.jnucmat.2009.01.203

DO - 10.1016/j.jnucmat.2009.01.203

M3 - Article

AN - SCOPUS:67349109139

SN - 0022-3115

VL - 390-391

SP - 764

EP - 767

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

IS - 1

ER -

Transition to ELM-free improved H-mode by lithium deposition on NSTX graphite divertor surfaces

Abstract

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