Attainment of high confinement in neutral beam heated divertor discharges in the PDX tokamak

S. M. Kaye; M. G. Bell; K. Bol; D. Boyd; K. Brau; D. Buchenauer; R. Budny; A. Cavallo; P. Couture; T. Crowley; D. S. Darrow; H. Eubank; R. J. Fonck; R. Goldston; B. Grek; K. P. Jaehnig; D. Johnson; R. Kaita; H. Kugel; B. Leblanc; J. Manickam; D. Manos; D. Mansfield; E. Mazzucato; R. McCann; D. McCune; K. McGuire; D. Mueller; A. Murdock; M. Okabayashi; K. Okano; D. K. Owens; D. E. Post; M. Reusch; G. L. Schmidt; S. Sesnic; R. Slusher; S. Suckewer; C. Surko; H. Takahashi; F. Tenney; H. Towner; J. Valley

doi:10.1016/0022-3115(84)90111-9

Attainment of high confinement in neutral beam heated divertor discharges in the PDX tokamak

S. M. Kaye, M. G. Bell, K. Bol, D. Boyd, K. Brau, D. Buchenauer, R. Budny, A. Cavallo, P. Couture, T. Crowley, D. S. Darrow, H. Eubank, R. J. Fonck, R. Goldston, B. Grek, K. P. Jaehnig, D. Johnson, R. Kaita, H. Kugel, B. LeblancJ. Manickam, D. Manos, D. Mansfield, E. Mazzucato, R. McCann, D. McCune, K. McGuire, D. Mueller, A. Murdock, M. Okabayashi, K. Okano, D. K. Owens, D. E. Post, M. Reusch, G. L. Schmidt, S. Sesnic, R. Slusher, S. Suckewer, C. Surko, H. Takahashi, F. Tenney, H. Towner, J. Valley

研究成果: Article › 査読

149 被引用数 (Scopus)

抄録

The PDX divertor configuration has recently been converted from an open to a closed geometry to inhibit the return of neutral gas from the divertor region to the main chamber. Since then, operation in a regime with high energy confinement in neutral beam heated discharges (ASDEX H-mode) has been routine over a wide range of operating conditions. These H-mode discharges are characterized by a sudden drop in divertor density and H_α emission and a spontaneous rise in main chamber plasma density during neutral beam injection. The confinement time is found to scale nearly linearly with plasma current, but can be degraded due either to the presence of edge instabilities or heavy gas puffing. Detailed Thomson scattering temperature profiles show high values of T_c near the plasma edge (∼ 450 eV) with sharp radial gradients (∼ 400 eV/cm) near the separatrix. Density profiles are broad and also exhibit steep gradients close to the separatrix.

本文言語	English
ページ（範囲）	115-125
ページ数	11
ジャーナル	Journal of Nuclear Materials
巻	121
号	C
DOI	https://doi.org/10.1016/0022-3115(84)90111-9
出版ステータス	Published - 1984 5月 1
外部発表	はい

ASJC Scopus subject areas

核物理学および高エネルギー物理学
材料科学（全般）
原子力エネルギーおよび原子力工学

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10.1016/0022-3115(84)90111-9

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Kaye, S. M., Bell, M. G., Bol, K., Boyd, D., Brau, K., Buchenauer, D., Budny, R., Cavallo, A., Couture, P., Crowley, T., Darrow, D. S., Eubank, H., Fonck, R. J., Goldston, R., Grek, B., Jaehnig, K. P., Johnson, D., Kaita, R., Kugel, H., ... Valley, J. (1984). Attainment of high confinement in neutral beam heated divertor discharges in the PDX tokamak. Journal of Nuclear Materials, 121(C), 115-125. https://doi.org/10.1016/0022-3115(84)90111-9

Kaye, SM, Bell, MG, Bol, K, Boyd, D, Brau, K, Buchenauer, D, Budny, R, Cavallo, A, Couture, P, Crowley, T, Darrow, DS, Eubank, H, Fonck, RJ, Goldston, R, Grek, B, Jaehnig, KP, Johnson, D, Kaita, R, Kugel, H, Leblanc, B, Manickam, J, Manos, D, Mansfield, D, Mazzucato, E, McCann, R, McCune, D, McGuire, K, Mueller, D, Murdock, A, Okabayashi, M, Okano, K, Owens, DK, Post, DE, Reusch, M, Schmidt, GL, Sesnic, S, Slusher, R, Suckewer, S, Surko, C, Takahashi, H, Tenney, F, Towner, H & Valley, J 1984, 'Attainment of high confinement in neutral beam heated divertor discharges in the PDX tokamak', Journal of Nuclear Materials, vol. 121, no. C, pp. 115-125. https://doi.org/10.1016/0022-3115(84)90111-9

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title = "Attainment of high confinement in neutral beam heated divertor discharges in the PDX tokamak",

abstract = "The PDX divertor configuration has recently been converted from an open to a closed geometry to inhibit the return of neutral gas from the divertor region to the main chamber. Since then, operation in a regime with high energy confinement in neutral beam heated discharges (ASDEX H-mode) has been routine over a wide range of operating conditions. These H-mode discharges are characterized by a sudden drop in divertor density and Hα emission and a spontaneous rise in main chamber plasma density during neutral beam injection. The confinement time is found to scale nearly linearly with plasma current, but can be degraded due either to the presence of edge instabilities or heavy gas puffing. Detailed Thomson scattering temperature profiles show high values of Tc near the plasma edge (∼ 450 eV) with sharp radial gradients (∼ 400 eV/cm) near the separatrix. Density profiles are broad and also exhibit steep gradients close to the separatrix.",

author = "Kaye, {S. M.} and Bell, {M. G.} and K. Bol and D. Boyd and K. Brau and D. Buchenauer and R. Budny and A. Cavallo and P. Couture and T. Crowley and Darrow, {D. S.} and H. Eubank and Fonck, {R. J.} and R. Goldston and B. Grek and Jaehnig, {K. P.} and D. Johnson and R. Kaita and H. Kugel and B. Leblanc and J. Manickam and D. Manos and D. Mansfield and E. Mazzucato and R. McCann and D. McCune and K. McGuire and D. Mueller and A. Murdock and M. Okabayashi and K. Okano and Owens, {D. K.} and Post, {D. E.} and M. Reusch and Schmidt, {G. L.} and S. Sesnic and R. Slusher and S. Suckewer and C. Surko and H. Takahashi and F. Tenney and H. Towner and J. Valley",

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T1 - Attainment of high confinement in neutral beam heated divertor discharges in the PDX tokamak

AU - Kaye, S. M.

AU - Bell, M. G.

AU - Bol, K.

AU - Boyd, D.

AU - Brau, K.

AU - Buchenauer, D.

AU - Budny, R.

AU - Cavallo, A.

AU - Couture, P.

AU - Crowley, T.

AU - Darrow, D. S.

AU - Eubank, H.

AU - Fonck, R. J.

AU - Goldston, R.

AU - Grek, B.

AU - Jaehnig, K. P.

AU - Johnson, D.

AU - Kaita, R.

AU - Kugel, H.

AU - Leblanc, B.

AU - Manickam, J.

AU - Manos, D.

AU - Mansfield, D.

AU - Mazzucato, E.

AU - McCann, R.

AU - McCune, D.

AU - McGuire, K.

AU - Mueller, D.

AU - Murdock, A.

AU - Okabayashi, M.

AU - Okano, K.

AU - Owens, D. K.

AU - Post, D. E.

AU - Reusch, M.

AU - Schmidt, G. L.

AU - Sesnic, S.

AU - Slusher, R.

AU - Suckewer, S.

AU - Surko, C.

AU - Takahashi, H.

AU - Tenney, F.

AU - Towner, H.

AU - Valley, J.

PY - 1984/5/1

Y1 - 1984/5/1

N2 - The PDX divertor configuration has recently been converted from an open to a closed geometry to inhibit the return of neutral gas from the divertor region to the main chamber. Since then, operation in a regime with high energy confinement in neutral beam heated discharges (ASDEX H-mode) has been routine over a wide range of operating conditions. These H-mode discharges are characterized by a sudden drop in divertor density and Hα emission and a spontaneous rise in main chamber plasma density during neutral beam injection. The confinement time is found to scale nearly linearly with plasma current, but can be degraded due either to the presence of edge instabilities or heavy gas puffing. Detailed Thomson scattering temperature profiles show high values of Tc near the plasma edge (∼ 450 eV) with sharp radial gradients (∼ 400 eV/cm) near the separatrix. Density profiles are broad and also exhibit steep gradients close to the separatrix.

AB - The PDX divertor configuration has recently been converted from an open to a closed geometry to inhibit the return of neutral gas from the divertor region to the main chamber. Since then, operation in a regime with high energy confinement in neutral beam heated discharges (ASDEX H-mode) has been routine over a wide range of operating conditions. These H-mode discharges are characterized by a sudden drop in divertor density and Hα emission and a spontaneous rise in main chamber plasma density during neutral beam injection. The confinement time is found to scale nearly linearly with plasma current, but can be degraded due either to the presence of edge instabilities or heavy gas puffing. Detailed Thomson scattering temperature profiles show high values of Tc near the plasma edge (∼ 450 eV) with sharp radial gradients (∼ 400 eV/cm) near the separatrix. Density profiles are broad and also exhibit steep gradients close to the separatrix.

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JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

SN - 0022-3115

IS - C

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Attainment of high confinement in neutral beam heated divertor discharges in the PDX tokamak

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