Particle control in the DIII-D advanced divertor

M. J. Schaffer; S. I. Lippmann; M. A. Mahdavi; T. W. Petrie; R. D. Stambaugh; J. Hogan; C. C. Klepper; P. Mioduszewski; L. Owen; D. N. Hill; M. Rensink; D. Buchenauer

doi:10.1109/FUSION.1991.218919

Particle control in the DIII-D advanced divertor

M. J. Schaffer, S. I. Lippmann, M. A. Mahdavi, T. W. Petrie, R. D. Stambaugh, J. Hogan, C. C. Klepper, P. Mioduszewski, L. Owen, D. N. Hill, M. Rensink, D. Buchenauer

Diagnostics and Control

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

A new, electrically biasable, scmi-closed divertor was installed and operated in the DIII-D lower outside diver- Tor location. The semi-closed divertor has yielded static gas pressure buildups in the pumping plenum in excess of 10 mtorr. (The planned cryogenic pumping is not yet installed.) Electrical bias controls the distribution of particle recycle between -the inner and outer divertors by E x B drifts. Depending on sign, bias increases or decreases the plenum gas pressure. Bias greatly reduces the sensitivity of plenum pressure to separatrix position. In particular, Ex B drifts in the DIII-D geometry can direct plasma across a divertor target and then optimally into the pumping aperture. Bias, even without active pumping, has also demonstrated a limited control of ELMing H-mode plasma.

Original language	English
Title of host publication	Proceedings - 14th IEEE/NPSS Symposium Fusion Engineering, FUSION 1991
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	197-200
Number of pages	4
ISBN (Electronic)	0780301323
DOIs	https://doi.org/10.1109/FUSION.1991.218919
State	Published - 1991
Event	14th IEEE/NPSS Symposium Fusion Engineering, FUSION 1991 - San Diego, United States Duration: Sep 30 1991 → Oct 3 1991

Publication series

Name	Proceedings - Symposium on Fusion Engineering

Conference

Conference	14th IEEE/NPSS Symposium Fusion Engineering, FUSION 1991
Country/Territory	United States
City	San Diego
Period	09/30/91 → 10/3/91

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This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1109/FUSION.1991.218919

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Schaffer, M. J., Lippmann, S. I., Mahdavi, M. A., Petrie, T. W., Stambaugh, R. D., Hogan, J., Klepper, C. C., Mioduszewski, P., Owen, L., Hill, D. N., Rensink, M., & Buchenauer, D. (1991). Particle control in the DIII-D advanced divertor. In Proceedings - 14th IEEE/NPSS Symposium Fusion Engineering, FUSION 1991 (pp. 197-200). Article 218919 (Proceedings - Symposium on Fusion Engineering). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/FUSION.1991.218919

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title = "Particle control in the DIII-D advanced divertor",

abstract = "A new, electrically biasable, scmi-closed divertor was installed and operated in the DIII-D lower outside diver- Tor location. The semi-closed divertor has yielded static gas pressure buildups in the pumping plenum in excess of 10 mtorr. (The planned cryogenic pumping is not yet installed.) Electrical bias controls the distribution of particle recycle between -the inner and outer divertors by E x B drifts. Depending on sign, bias increases or decreases the plenum gas pressure. Bias greatly reduces the sensitivity of plenum pressure to separatrix position. In particular, Ex B drifts in the DIII-D geometry can direct plasma across a divertor target and then optimally into the pumping aperture. Bias, even without active pumping, has also demonstrated a limited control of ELMing H-mode plasma.",

author = "Schaffer, {M. J.} and Lippmann, {S. I.} and Mahdavi, {M. A.} and Petrie, {T. W.} and Stambaugh, {R. D.} and J. Hogan and Klepper, {C. C.} and P. Mioduszewski and L. Owen and Hill, {D. N.} and M. Rensink and D. Buchenauer",

note = "Publisher Copyright: {\textcopyright} 1991 IEEE.; 14th IEEE/NPSS Symposium Fusion Engineering, FUSION 1991 ; Conference date: 30-09-1991 Through 03-10-1991",

year = "1991",

doi = "10.1109/FUSION.1991.218919",

language = "English",

series = "Proceedings - Symposium on Fusion Engineering",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

pages = "197--200",

booktitle = "Proceedings - 14th IEEE/NPSS Symposium Fusion Engineering, FUSION 1991",

}

Schaffer, MJ, Lippmann, SI, Mahdavi, MA, Petrie, TW, Stambaugh, RD, Hogan, J, Klepper, CC, Mioduszewski, P, Owen, L, Hill, DN, Rensink, M & Buchenauer, D 1991, Particle control in the DIII-D advanced divertor. in Proceedings - 14th IEEE/NPSS Symposium Fusion Engineering, FUSION 1991., 218919, Proceedings - Symposium on Fusion Engineering, Institute of Electrical and Electronics Engineers Inc., pp. 197-200, 14th IEEE/NPSS Symposium Fusion Engineering, FUSION 1991, San Diego, United States, 09/30/91. https://doi.org/10.1109/FUSION.1991.218919

Particle control in the DIII-D advanced divertor. / Schaffer, M. J.; Lippmann, S. I.; Mahdavi, M. A. et al.
Proceedings - 14th IEEE/NPSS Symposium Fusion Engineering, FUSION 1991. Institute of Electrical and Electronics Engineers Inc., 1991. p. 197-200 218919 (Proceedings - Symposium on Fusion Engineering).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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T1 - Particle control in the DIII-D advanced divertor

AU - Schaffer, M. J.

AU - Lippmann, S. I.

AU - Mahdavi, M. A.

AU - Petrie, T. W.

AU - Stambaugh, R. D.

AU - Hogan, J.

AU - Klepper, C. C.

AU - Mioduszewski, P.

AU - Owen, L.

AU - Hill, D. N.

AU - Rensink, M.

AU - Buchenauer, D.

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N2 - A new, electrically biasable, scmi-closed divertor was installed and operated in the DIII-D lower outside diver- Tor location. The semi-closed divertor has yielded static gas pressure buildups in the pumping plenum in excess of 10 mtorr. (The planned cryogenic pumping is not yet installed.) Electrical bias controls the distribution of particle recycle between -the inner and outer divertors by E x B drifts. Depending on sign, bias increases or decreases the plenum gas pressure. Bias greatly reduces the sensitivity of plenum pressure to separatrix position. In particular, Ex B drifts in the DIII-D geometry can direct plasma across a divertor target and then optimally into the pumping aperture. Bias, even without active pumping, has also demonstrated a limited control of ELMing H-mode plasma.

AB - A new, electrically biasable, scmi-closed divertor was installed and operated in the DIII-D lower outside diver- Tor location. The semi-closed divertor has yielded static gas pressure buildups in the pumping plenum in excess of 10 mtorr. (The planned cryogenic pumping is not yet installed.) Electrical bias controls the distribution of particle recycle between -the inner and outer divertors by E x B drifts. Depending on sign, bias increases or decreases the plenum gas pressure. Bias greatly reduces the sensitivity of plenum pressure to separatrix position. In particular, Ex B drifts in the DIII-D geometry can direct plasma across a divertor target and then optimally into the pumping aperture. Bias, even without active pumping, has also demonstrated a limited control of ELMing H-mode plasma.

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M3 - Conference contribution

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BT - Proceedings - 14th IEEE/NPSS Symposium Fusion Engineering, FUSION 1991

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 14th IEEE/NPSS Symposium Fusion Engineering, FUSION 1991

Y2 - 30 September 1991 through 3 October 1991

ER -

Particle control in the DIII-D advanced divertor

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