High power neutral beam heating experiments on TFTR with balanced and unbalanced momemtum input

M. Bitter; V. Arunasalam; M. G. Bell; S. Bosch; N. L. Bretz; R. Budny; C. E. Bush; D. L. Dimock; H. F. Dylla; P. C. Efthimion; R. J. Fonck; E. Fredrickson; H. P. Furth; G. Gammel; Robert James Goldston; B. Grek; L. R. Grisham; G. Hammett; K. Hattori; R. J. Hawryluk; H. W. Hendel; K. W. Hill; E. Hinnov; T. Hirayama; R. B. Howell; R. A. Hulse; H. Hsuan; K. P. Jaehnig; D. Jassby; F. C. Jobes; D. W. Johnson; L. C. Johnson; R. Kaita; R. Kamperschroer; S. J. Kilpatrick; R. J. Knize; H. Kugel; P. H. Lamarche; B. Leblanc; R. Little; D. M. Manos; D. K. Mansfield; S. McDermott; K. McGuire; D. H. McNeill; D. M. Meade; S. S. Medley; D. R. Mikkelsen; W. Morris; D. Mueller; E. B. Nieschmidt; T. Nishitani; D. K. Owens; H. Park; A. T. Ramsey; M. H. Redi; J. Rice; A. L. Roquemore; P. H. Rutherford; T. Saito; G. Schilling; J. Schivell; G. L. Schmidt; S. D. Scott; J. C. Sinnis; F. J. Stauffer; J. D. Strachan; C. Stratton; G. D. Tait; Y. Takase; G. Taylor; J. R. Timberlake; H. H. Towner; M. Ulrickson; S. Von Goeler; R. Wieland; M. Williams; K. L. Wong; S. Yoshikawa; K. M. Young; M. C. Zarnstorff; S. J. Zweben

doi:10.1088/0741-3335/29/10A/305

High power neutral beam heating experiments on TFTR with balanced and unbalanced momemtum input

M. Bitter, V. Arunasalam, M. G. Bell, S. Bosch, N. L. Bretz, R. Budny, C. E. Bush, D. L. Dimock, H. F. Dylla, P. C. Efthimion, R. J. Fonck, E. Fredrickson, H. P. Furth, G. Gammel, Robert James Goldston, B. Grek, L. R. Grisham, G. Hammett, K. Hattori, R. J. HawrylukH. W. Hendel, K. W. Hill, E. Hinnov, T. Hirayama, R. B. Howell, R. A. Hulse, H. Hsuan, K. P. Jaehnig, D. Jassby, F. C. Jobes, D. W. Johnson, L. C. Johnson, R. Kaita, R. Kamperschroer, S. J. Kilpatrick, R. J. Knize, H. Kugel, P. H. Lamarche, B. Leblanc, R. Little, D. M. Manos, D. K. Mansfield, S. McDermott, K. McGuire, D. H. McNeill, D. M. Meade, S. S. Medley, D. R. Mikkelsen, W. Morris, D. Mueller, E. B. Nieschmidt, T. Nishitani, D. K. Owens, H. Park, A. T. Ramsey, M. H. Redi, J. Rice, A. L. Roquemore, P. H. Rutherford, T. Saito, G. Schilling, J. Schivell, G. L. Schmidt, S. D. Scott, J. C. Sinnis, F. J. Stauffer, J. D. Strachan, C. Stratton, G. D. Tait, Y. Takase, G. Taylor, J. R. Timberlake, H. H. Towner, M. Ulrickson, S. Von Goeler, R. Wieland, M. Williams, K. L. Wong, S. Yoshikawa, K. M. Young, M. C. Zarnstorff, S. J. Zweben

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Abstract

New long-pulse ion sources have been employed to extend the neutral beam pulse on TFTR from 0.5 sec to 2.0 sec. This made it possible to study the long-term evolution of supershots at constant current and to perform experiments in which the plasma current was ramped up during the heating pulse. Experiments were conducted with co and counter injection as well as with nearly balanced injection of deuterium beams up to a total power of 20 MW. The best results, i.e., central ion temperatures T_io > 25 keV and n_eo τ_E T_io values of 3 × 10²⁰ keV sec m^-3, were obtained with nearly balanced injection. The central toroidal plasma rotation velocity scales in a linear-offset fashion with beam power and density. The scaling of the inferred global momentum confinement time with plasma parameters is inconsistent with the predictions of the neoclassical theory of gyroviscous damping. An interesting plasma regime with properties similar to the H-mode has been observed for limiter plasmas with edge q _a just above 3 and 2.5.

Original language	English (US)
Article number	305
Pages (from-to)	1235-1245
Number of pages	11
Journal	Plasma Physics and Controlled Fusion
Volume	29
Issue number	10 A
DOIs	https://doi.org/10.1088/0741-3335/29/10A/305
State	Published - 1987

All Science Journal Classification (ASJC) codes

Nuclear Energy and Engineering
Condensed Matter Physics

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10.1088/0741-3335/29/10A/305

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Bitter, M., Arunasalam, V., Bell, M. G., Bosch, S., Bretz, N. L., Budny, R., Bush, C. E., Dimock, D. L., Dylla, H. F., Efthimion, P. C., Fonck, R. J., Fredrickson, E., Furth, H. P., Gammel, G., Goldston, R. J., Grek, B., Grisham, L. R., Hammett, G., Hattori, K., ... Zweben, S. J. (1987). High power neutral beam heating experiments on TFTR with balanced and unbalanced momemtum input. Plasma Physics and Controlled Fusion, 29(10 A), 1235-1245. Article 305. https://doi.org/10.1088/0741-3335/29/10A/305

@article{7097b1dcc736437ba1258c2e1dbe265d,

title = "High power neutral beam heating experiments on TFTR with balanced and unbalanced momemtum input",

abstract = "New long-pulse ion sources have been employed to extend the neutral beam pulse on TFTR from 0.5 sec to 2.0 sec. This made it possible to study the long-term evolution of supershots at constant current and to perform experiments in which the plasma current was ramped up during the heating pulse. Experiments were conducted with co and counter injection as well as with nearly balanced injection of deuterium beams up to a total power of 20 MW. The best results, i.e., central ion temperatures Tio > 25 keV and neo τE Tio values of 3 × 1020 keV sec m-3, were obtained with nearly balanced injection. The central toroidal plasma rotation velocity scales in a linear-offset fashion with beam power and density. The scaling of the inferred global momentum confinement time with plasma parameters is inconsistent with the predictions of the neoclassical theory of gyroviscous damping. An interesting plasma regime with properties similar to the H-mode has been observed for limiter plasmas with edge q a just above 3 and 2.5.",

author = "M. Bitter and V. Arunasalam and Bell, {M. G.} and S. Bosch and Bretz, {N. L.} and R. Budny and Bush, {C. E.} and Dimock, {D. L.} and Dylla, {H. F.} and Efthimion, {P. C.} and Fonck, {R. J.} and E. Fredrickson and Furth, {H. P.} and G. Gammel and Goldston, {Robert James} and B. Grek and Grisham, {L. R.} and G. Hammett and K. Hattori and Hawryluk, {R. J.} and Hendel, {H. W.} and Hill, {K. W.} and E. Hinnov and T. Hirayama and Howell, {R. B.} and Hulse, {R. A.} and H. Hsuan and Jaehnig, {K. P.} and D. Jassby and Jobes, {F. C.} and Johnson, {D. W.} and Johnson, {L. C.} and R. Kaita and R. Kamperschroer and Kilpatrick, {S. J.} and Knize, {R. J.} and H. Kugel and Lamarche, {P. H.} and B. Leblanc and R. Little and Manos, {D. M.} and Mansfield, {D. K.} and S. McDermott and K. McGuire and McNeill, {D. H.} and Meade, {D. M.} and Medley, {S. S.} and Mikkelsen, {D. R.} and W. Morris and D. Mueller and Nieschmidt, {E. B.} and T. Nishitani and Owens, {D. K.} and H. Park and Ramsey, {A. T.} and Redi, {M. H.} and J. Rice and Roquemore, {A. L.} and Rutherford, {P. H.} and T. Saito and G. Schilling and J. Schivell and Schmidt, {G. L.} and Scott, {S. D.} and Sinnis, {J. C.} and Stauffer, {F. J.} and Strachan, {J. D.} and C. Stratton and Tait, {G. D.} and Y. Takase and G. Taylor and Timberlake, {J. R.} and Towner, {H. H.} and M. Ulrickson and {Von Goeler}, S. and R. Wieland and M. Williams and Wong, {K. L.} and S. Yoshikawa and Young, {K. M.} and Zarnstorff, {M. C.} and Zweben, {S. J.}",

year = "1987",

doi = "10.1088/0741-3335/29/10A/305",

language = "English (US)",

volume = "29",

pages = "1235--1245",

journal = "Plasma Physics and Controlled Fusion",

issn = "0741-3335",

publisher = "IOP Publishing Ltd.",

number = "10 A",

}

Bitter, M, Arunasalam, V, Bell, MG, Bosch, S, Bretz, NL, Budny, R, Bush, CE, Dimock, DL, Dylla, HF, Efthimion, PC, Fonck, RJ, Fredrickson, E, Furth, HP, Gammel, G, Goldston, RJ, Grek, B, Grisham, LR, Hammett, G, Hattori, K, Hawryluk, RJ, Hendel, HW, Hill, KW, Hinnov, E, Hirayama, T, Howell, RB, Hulse, RA, Hsuan, H, Jaehnig, KP, Jassby, D, Jobes, FC, Johnson, DW, Johnson, LC, Kaita, R, Kamperschroer, R, Kilpatrick, SJ, Knize, RJ, Kugel, H, Lamarche, PH, Leblanc, B, Little, R, Manos, DM, Mansfield, DK, McDermott, S, McGuire, K, McNeill, DH, Meade, DM, Medley, SS, Mikkelsen, DR, Morris, W, Mueller, D, Nieschmidt, EB, Nishitani, T, Owens, DK, Park, H, Ramsey, AT, Redi, MH, Rice, J, Roquemore, AL, Rutherford, PH, Saito, T, Schilling, G, Schivell, J, Schmidt, GL, Scott, SD, Sinnis, JC, Stauffer, FJ, Strachan, JD, Stratton, C, Tait, GD, Takase, Y, Taylor, G, Timberlake, JR, Towner, HH, Ulrickson, M, Von Goeler, S, Wieland, R, Williams, M, Wong, KL, Yoshikawa, S, Young, KM, Zarnstorff, MC & Zweben, SJ 1987, 'High power neutral beam heating experiments on TFTR with balanced and unbalanced momemtum input', Plasma Physics and Controlled Fusion, vol. 29, no. 10 A, 305, pp. 1235-1245. https://doi.org/10.1088/0741-3335/29/10A/305

TY - JOUR

T1 - High power neutral beam heating experiments on TFTR with balanced and unbalanced momemtum input

AU - Bitter, M.

AU - Arunasalam, V.

AU - Bell, M. G.

AU - Bosch, S.

AU - Bretz, N. L.

AU - Budny, R.

AU - Bush, C. E.

AU - Dimock, D. L.

AU - Dylla, H. F.

AU - Efthimion, P. C.

AU - Fonck, R. J.

AU - Fredrickson, E.

AU - Furth, H. P.

AU - Gammel, G.

AU - Goldston, Robert James

AU - Grek, B.

AU - Grisham, L. R.

AU - Hammett, G.

AU - Hattori, K.

AU - Hawryluk, R. J.

AU - Hendel, H. W.

AU - Hill, K. W.

AU - Hinnov, E.

AU - Hirayama, T.

AU - Howell, R. B.

AU - Hulse, R. A.

AU - Hsuan, H.

AU - Jaehnig, K. P.

AU - Jassby, D.

AU - Jobes, F. C.

AU - Johnson, D. W.

AU - Johnson, L. C.

AU - Kaita, R.

AU - Kamperschroer, R.

AU - Kilpatrick, S. J.

AU - Knize, R. J.

AU - Kugel, H.

AU - Lamarche, P. H.

AU - Leblanc, B.

AU - Little, R.

AU - Manos, D. M.

AU - Mansfield, D. K.

AU - McDermott, S.

AU - McGuire, K.

AU - McNeill, D. H.

AU - Meade, D. M.

AU - Medley, S. S.

AU - Mikkelsen, D. R.

AU - Morris, W.

AU - Mueller, D.

AU - Nieschmidt, E. B.

AU - Nishitani, T.

AU - Owens, D. K.

AU - Park, H.

AU - Ramsey, A. T.

AU - Redi, M. H.

AU - Rice, J.

AU - Roquemore, A. L.

AU - Rutherford, P. H.

AU - Saito, T.

AU - Schilling, G.

AU - Schivell, J.

AU - Schmidt, G. L.

AU - Scott, S. D.

AU - Sinnis, J. C.

AU - Stauffer, F. J.

AU - Strachan, J. D.

AU - Stratton, C.

AU - Tait, G. D.

AU - Takase, Y.

AU - Taylor, G.

AU - Timberlake, J. R.

AU - Towner, H. H.

AU - Ulrickson, M.

AU - Von Goeler, S.

AU - Wieland, R.

AU - Williams, M.

AU - Wong, K. L.

AU - Yoshikawa, S.

AU - Young, K. M.

AU - Zarnstorff, M. C.

AU - Zweben, S. J.

PY - 1987

Y1 - 1987

N2 - New long-pulse ion sources have been employed to extend the neutral beam pulse on TFTR from 0.5 sec to 2.0 sec. This made it possible to study the long-term evolution of supershots at constant current and to perform experiments in which the plasma current was ramped up during the heating pulse. Experiments were conducted with co and counter injection as well as with nearly balanced injection of deuterium beams up to a total power of 20 MW. The best results, i.e., central ion temperatures Tio > 25 keV and neo τE Tio values of 3 × 1020 keV sec m-3, were obtained with nearly balanced injection. The central toroidal plasma rotation velocity scales in a linear-offset fashion with beam power and density. The scaling of the inferred global momentum confinement time with plasma parameters is inconsistent with the predictions of the neoclassical theory of gyroviscous damping. An interesting plasma regime with properties similar to the H-mode has been observed for limiter plasmas with edge q a just above 3 and 2.5.

AB - New long-pulse ion sources have been employed to extend the neutral beam pulse on TFTR from 0.5 sec to 2.0 sec. This made it possible to study the long-term evolution of supershots at constant current and to perform experiments in which the plasma current was ramped up during the heating pulse. Experiments were conducted with co and counter injection as well as with nearly balanced injection of deuterium beams up to a total power of 20 MW. The best results, i.e., central ion temperatures Tio > 25 keV and neo τE Tio values of 3 × 1020 keV sec m-3, were obtained with nearly balanced injection. The central toroidal plasma rotation velocity scales in a linear-offset fashion with beam power and density. The scaling of the inferred global momentum confinement time with plasma parameters is inconsistent with the predictions of the neoclassical theory of gyroviscous damping. An interesting plasma regime with properties similar to the H-mode has been observed for limiter plasmas with edge q a just above 3 and 2.5.

UR - http://www.scopus.com/inward/record.url?scp=3342981699&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=3342981699&partnerID=8YFLogxK

U2 - 10.1088/0741-3335/29/10A/305

DO - 10.1088/0741-3335/29/10A/305

M3 - Article

AN - SCOPUS:3342981699

SN - 0741-3335

VL - 29

SP - 1235

EP - 1245

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

IS - 10 A

M1 - 305

ER -

High power neutral beam heating experiments on TFTR with balanced and unbalanced momemtum input

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