High confinement dissipative divertor operation on Alcator C-Mod

J. A. Goetz; B. LaBombard; B. Lipschultz; C. S. Pitcher; J. L. Terry; C. Boswell; S. Gangadhara; D. Pappas; J. Weaver; B. Welch; R. L. Boivin; P. Bonoli; C. Fiore; R. Granetz; M. Greenwald; A. Hubbard; I. Hutchinson; J. Irby; E. Marmar; D. Mossessian; M. Porkolab; J. Rice; W. L. Rowan; G. Schilling; J. Snipes; Y. Takase; S. Wolfe; S. Wukitch

doi:10.1063/1.873447

High confinement dissipative divertor operation on Alcator C-Mod

J. A. Goetz, B. LaBombard, B. Lipschultz, C. S. Pitcher, J. L. Terry, C. Boswell, S. Gangadhara, D. Pappas, J. Weaver, B. Welch, R. L. Boivin, P. Bonoli, C. Fiore, R. Granetz, M. Greenwald, A. Hubbard, I. Hutchinson, J. Irby, E. Marmar, D. MossessianM. Porkolab, J. Rice, W. L. Rowan, G. Schilling, J. Snipes, Y. Takase, S. Wolfe, S. Wukitch

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Abstract

Alcator C-Mod [I. H. Hutchinson et al., Phys. Plasmas 1, 1511 (1994)] has operated a High-confinement-mode (H-mode) plasma together with a dissipative divertor and low core Z_eff. The initially attached plasma is characterized by steady-state enhancement factor, H_ITER89P [P. N. Yushmanov et al., Nucl. Fusion 30, 1999 (1990)], of 1.9, central Z_eff of 1.1, and a radiative fraction of ∼50%. Feedback control of a nitrogen gas puff is used to increase radiative losses in both the core/edge and divertor plasmas in almost equal amounts. Simultaneously, the core plasma maintains #_ITER89P of 1.6 and Z_eff of 1.4 in this nearly 100% radiative state. The power and particle flux to the divertor plates have been reduced to very low levels while the core plasma is relatively unchanged by the dissipative nature of the divertor.

Original language	English (US)
Pages (from-to)	1899-1906
Number of pages	8
Journal	Physics of Plasmas
Volume	6
Issue number	5 I
DOIs	https://doi.org/10.1063/1.873447
State	Published - May 1999
Externally published	Yes

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

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Goetz, J. A., LaBombard, B., Lipschultz, B., Pitcher, C. S., Terry, J. L., Boswell, C., Gangadhara, S., Pappas, D., Weaver, J., Welch, B., Boivin, R. L., Bonoli, P., Fiore, C., Granetz, R., Greenwald, M., Hubbard, A., Hutchinson, I., Irby, J., Marmar, E., ... Wukitch, S. (1999). High confinement dissipative divertor operation on Alcator C-Mod. Physics of Plasmas, 6(5 I), 1899-1906. https://doi.org/10.1063/1.873447

@article{7d955bb1428349718f7a525c941daf28,

title = "High confinement dissipative divertor operation on Alcator C-Mod",

abstract = "Alcator C-Mod [I. H. Hutchinson et al., Phys. Plasmas 1, 1511 (1994)] has operated a High-confinement-mode (H-mode) plasma together with a dissipative divertor and low core Zeff. The initially attached plasma is characterized by steady-state enhancement factor, HITER89P [P. N. Yushmanov et al., Nucl. Fusion 30, 1999 (1990)], of 1.9, central Zeff of 1.1, and a radiative fraction of ∼50\%. Feedback control of a nitrogen gas puff is used to increase radiative losses in both the core/edge and divertor plasmas in almost equal amounts. Simultaneously, the core plasma maintains \#ITER89P of 1.6 and Zeff of 1.4 in this nearly 100\% radiative state. The power and particle flux to the divertor plates have been reduced to very low levels while the core plasma is relatively unchanged by the dissipative nature of the divertor.",

author = "Goetz, \{J. A.\} and B. LaBombard and B. Lipschultz and Pitcher, \{C. S.\} and Terry, \{J. L.\} and C. Boswell and S. Gangadhara and D. Pappas and J. Weaver and B. Welch and Boivin, \{R. L.\} and P. Bonoli and C. Fiore and R. Granetz and M. Greenwald and A. Hubbard and I. Hutchinson and J. Irby and E. Marmar and D. Mossessian and M. Porkolab and J. Rice and Rowan, \{W. L.\} and G. Schilling and J. Snipes and Y. Takase and S. Wolfe and S. Wukitch",

year = "1999",

month = may,

doi = "10.1063/1.873447",

language = "English (US)",

volume = "6",

pages = "1899--1906",

journal = "Physics of Plasmas",

issn = "1070-664X",

publisher = "American Institute of Physics",

number = "5 I",

}

Goetz, JA, LaBombard, B, Lipschultz, B, Pitcher, CS, Terry, JL, Boswell, C, Gangadhara, S, Pappas, D, Weaver, J, Welch, B, Boivin, RL, Bonoli, P, Fiore, C, Granetz, R, Greenwald, M, Hubbard, A, Hutchinson, I, Irby, J, Marmar, E, Mossessian, D, Porkolab, M, Rice, J, Rowan, WL, Schilling, G, Snipes, J, Takase, Y, Wolfe, S & Wukitch, S 1999, 'High confinement dissipative divertor operation on Alcator C-Mod', Physics of Plasmas, vol. 6, no. 5 I, pp. 1899-1906. https://doi.org/10.1063/1.873447

TY - JOUR

T1 - High confinement dissipative divertor operation on Alcator C-Mod

AU - Goetz, J. A.

AU - LaBombard, B.

AU - Lipschultz, B.

AU - Pitcher, C. S.

AU - Terry, J. L.

AU - Boswell, C.

AU - Gangadhara, S.

AU - Pappas, D.

AU - Weaver, J.

AU - Welch, B.

AU - Boivin, R. L.

AU - Bonoli, P.

AU - Fiore, C.

AU - Granetz, R.

AU - Greenwald, M.

AU - Hubbard, A.

AU - Hutchinson, I.

AU - Irby, J.

AU - Marmar, E.

AU - Mossessian, D.

AU - Porkolab, M.

AU - Rice, J.

AU - Rowan, W. L.

AU - Schilling, G.

AU - Snipes, J.

AU - Takase, Y.

AU - Wolfe, S.

AU - Wukitch, S.

PY - 1999/5

Y1 - 1999/5

N2 - Alcator C-Mod [I. H. Hutchinson et al., Phys. Plasmas 1, 1511 (1994)] has operated a High-confinement-mode (H-mode) plasma together with a dissipative divertor and low core Zeff. The initially attached plasma is characterized by steady-state enhancement factor, HITER89P [P. N. Yushmanov et al., Nucl. Fusion 30, 1999 (1990)], of 1.9, central Zeff of 1.1, and a radiative fraction of ∼50%. Feedback control of a nitrogen gas puff is used to increase radiative losses in both the core/edge and divertor plasmas in almost equal amounts. Simultaneously, the core plasma maintains #ITER89P of 1.6 and Zeff of 1.4 in this nearly 100% radiative state. The power and particle flux to the divertor plates have been reduced to very low levels while the core plasma is relatively unchanged by the dissipative nature of the divertor.

AB - Alcator C-Mod [I. H. Hutchinson et al., Phys. Plasmas 1, 1511 (1994)] has operated a High-confinement-mode (H-mode) plasma together with a dissipative divertor and low core Zeff. The initially attached plasma is characterized by steady-state enhancement factor, HITER89P [P. N. Yushmanov et al., Nucl. Fusion 30, 1999 (1990)], of 1.9, central Zeff of 1.1, and a radiative fraction of ∼50%. Feedback control of a nitrogen gas puff is used to increase radiative losses in both the core/edge and divertor plasmas in almost equal amounts. Simultaneously, the core plasma maintains #ITER89P of 1.6 and Zeff of 1.4 in this nearly 100% radiative state. The power and particle flux to the divertor plates have been reduced to very low levels while the core plasma is relatively unchanged by the dissipative nature of the divertor.

UR - https://www.scopus.com/pages/publications/0010292941

UR - https://www.scopus.com/inward/citedby.url?scp=0010292941&partnerID=8YFLogxK

U2 - 10.1063/1.873447

DO - 10.1063/1.873447

M3 - Article

AN - SCOPUS:0010292941

SN - 1070-664X

VL - 6

SP - 1899

EP - 1906

JO - Physics of Plasmas

JF - Physics of Plasmas

IS - 5 I

ER -

High confinement dissipative divertor operation on Alcator C-Mod

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