Comparison of detached and radiative divertor operation in Alcator C‐Mod

J. A. Goetz; C. Kurz; B. Labombard; B. Lipschultz; A. Niemczewski; G. M. Mccracken; J. L. Terry; R. L. Boivin; F. Bombarda; P. Bonoli; C. Fiore; S. Golovato; R. Granetz; M. Greenwald; S. Horne; A. Hubbard; I. Hutchinson; J. Irby; E. Marmar; M. Porkolab; J. Rice; J. Snipes; Y. Takase; R. Watterson; B. Welch; S. Wolfe; C. Christensen; D. Garnier; D. Jablonski; D. lo; D. Lumma; M. May; A. Mazurenko; R. Nachtrieb; P. O'shea; J. Reardon; J. Rost; J. Schachter; J. Sorci; P. Stek; M. Umansky; Y. Wang

doi:10.1063/1.871986

Comparison of detached and radiative divertor operation in Alcator C‐Mod

J. A. Goetz
, C. Kurz
, B. Labombard
, B. Lipschultz
, A. Niemczewski
, G. M. Mccracken
, J. L. Terry
, R. L. Boivin
, F. Bombarda
, P. Bonoli
, C. Fiore
, S. Golovato
, R. Granetz
, M. Greenwald
, S. Horne
, A. Hubbard
, I. Hutchinson
, J. Irby
, E. Marmar
, M. Porkolab

J. Rice, J. Snipes, Y. Takase, R. Watterson, B. Welch, S. Wolfe, C. Christensen, D. Garnier, D. Jablonski, D. lo, D. Lumma, M. May, A. Mazurenko, R. Nachtrieb, P. O'shea, J. Reardon, J. Rost, J. Schachter, J. Sorci, P. Stek, M. Umansky, Y. Wang

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

Abstract

The divertor of the Alcator C‐Mod tokamak [Phys. Plasmas 1, 1511 (1994)] routinely radiates a large fraction of the power entering the scrape‐off layer. This dissipative divertor operation occurs whether the divertor is detached or not, and large volumetric radiative emissivities, up to 60 MW m⁻³ in ion cyclotron range of frequency (ICRF) heated discharges, have been measured using bolometer arrays. An analysis of both Ohmic and ICRF‐heated discharges has demonstrated some of the relative merits of detached divertor operation versus high‐recycling divertor operation. An advantage of detached divertor operation is that the power flux to the divertor plates is decreased even further than its already low value. Some disadvantages are that volumetric losses outside the separatrix in the divertor region are decreased, the neutral compression ratio is decreased, and the penetration efficiency of impurities increases.

Original language	American English
Pages (from-to)	1908-1915
Number of pages	8
Journal	Physics of Plasmas
Volume	3
Issue number	5
DOIs	https://doi.org/10.1063/1.871986
State	Published - May 1996
Externally published	Yes

ASJC Scopus subject areas

Condensed Matter Physics

Keywords

ALCATOR DEVICE
DEUTERIUM
DIVERTORS
ICR HEATING
PLASMA DIAGNOSTICS
PLASMA IMPURITIES
PLASMA SCRAPE−OFF LAYER
THERMONUCLEAR REACTIONS

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10.1063/1.871986

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Goetz, J. A., Kurz, C., Labombard, B., Lipschultz, B., Niemczewski, A., Mccracken, G. M., Terry, J. L., Boivin, R. L., Bombarda, F., Bonoli, P., Fiore, C., Golovato, S., Granetz, R., Greenwald, M., Horne, S., Hubbard, A., Hutchinson, I., Irby, J., Marmar, E., ... Wang, Y. (1996). Comparison of detached and radiative divertor operation in Alcator C‐Mod. Physics of Plasmas, 3(5), 1908-1915. https://doi.org/10.1063/1.871986

@article{763b3eb26e6046d0bd7f69b304b3b97f,

title = "Comparison of detached and radiative divertor operation in Alcator C‐Mod",

abstract = "The divertor of the Alcator C‐Mod tokamak [Phys. Plasmas 1, 1511 (1994)] routinely radiates a large fraction of the power entering the scrape‐off layer. This dissipative divertor operation occurs whether the divertor is detached or not, and large volumetric radiative emissivities, up to 60 MW m−3 in ion cyclotron range of frequency (ICRF) heated discharges, have been measured using bolometer arrays. An analysis of both Ohmic and ICRF‐heated discharges has demonstrated some of the relative merits of detached divertor operation versus high‐recycling divertor operation. An advantage of detached divertor operation is that the power flux to the divertor plates is decreased even further than its already low value. Some disadvantages are that volumetric losses outside the separatrix in the divertor region are decreased, the neutral compression ratio is decreased, and the penetration efficiency of impurities increases.",

keywords = "ALCATOR DEVICE, DEUTERIUM, DIVERTORS, ICR HEATING, PLASMA DIAGNOSTICS, PLASMA IMPURITIES, PLASMA SCRAPE−OFF LAYER, THERMONUCLEAR REACTIONS",

author = "Goetz, \{J. A.\} and C. Kurz and B. Labombard and B. Lipschultz and A. Niemczewski and Mccracken, \{G. M.\} and Terry, \{J. L.\} and Boivin, \{R. L.\} and F. Bombarda and P. Bonoli and C. Fiore and S. Golovato and R. Granetz and M. Greenwald and S. Horne and A. Hubbard and I. Hutchinson and J. Irby and E. Marmar and M. Porkolab and J. Rice and J. Snipes and Y. Takase and R. Watterson and B. Welch and S. Wolfe and C. Christensen and D. Garnier and D. Jablonski and D. lo and D. Lumma and M. May and A. Mazurenko and R. Nachtrieb and P. O'shea and J. Reardon and J. Rost and J. Schachter and J. Sorci and P. Stek and M. Umansky and Y. Wang",

year = "1996",

month = may,

doi = "10.1063/1.871986",

language = "American English",

volume = "3",

pages = "1908--1915",

journal = "Physics of Plasmas",

issn = "1070-664X",

publisher = "American Institute of Physics",

number = "5",

}

Goetz, JA, Kurz, C, Labombard, B, Lipschultz, B, Niemczewski, A, Mccracken, GM, Terry, JL, Boivin, RL, Bombarda, F, Bonoli, P, Fiore, C, Golovato, S, Granetz, R, Greenwald, M, Horne, S, Hubbard, A, Hutchinson, I, Irby, J, Marmar, E, Porkolab, M, Rice, J, Snipes, J, Takase, Y, Watterson, R, Welch, B, Wolfe, S, Christensen, C, Garnier, D, Jablonski, D, lo, D, Lumma, D, May, M, Mazurenko, A, Nachtrieb, R, O'shea, P, Reardon, J, Rost, J, Schachter, J, Sorci, J, Stek, P, Umansky, M & Wang, Y 1996, 'Comparison of detached and radiative divertor operation in Alcator C‐Mod', Physics of Plasmas, vol. 3, no. 5, pp. 1908-1915. https://doi.org/10.1063/1.871986

TY - JOUR

T1 - Comparison of detached and radiative divertor operation in Alcator C‐Mod

AU - Goetz, J. A.

AU - Kurz, C.

AU - Labombard, B.

AU - Lipschultz, B.

AU - Niemczewski, A.

AU - Mccracken, G. M.

AU - Terry, J. L.

AU - Boivin, R. L.

AU - Bombarda, F.

AU - Bonoli, P.

AU - Fiore, C.

AU - Golovato, S.

AU - Granetz, R.

AU - Greenwald, M.

AU - Horne, S.

AU - Hubbard, A.

AU - Hutchinson, I.

AU - Irby, J.

AU - Marmar, E.

AU - Porkolab, M.

AU - Rice, J.

AU - Snipes, J.

AU - Takase, Y.

AU - Watterson, R.

AU - Welch, B.

AU - Wolfe, S.

AU - Christensen, C.

AU - Garnier, D.

AU - Jablonski, D.

AU - lo, D.

AU - Lumma, D.

AU - May, M.

AU - Mazurenko, A.

AU - Nachtrieb, R.

AU - O'shea, P.

AU - Reardon, J.

AU - Rost, J.

AU - Schachter, J.

AU - Sorci, J.

AU - Stek, P.

AU - Umansky, M.

AU - Wang, Y.

PY - 1996/5

Y1 - 1996/5

N2 - The divertor of the Alcator C‐Mod tokamak [Phys. Plasmas 1, 1511 (1994)] routinely radiates a large fraction of the power entering the scrape‐off layer. This dissipative divertor operation occurs whether the divertor is detached or not, and large volumetric radiative emissivities, up to 60 MW m−3 in ion cyclotron range of frequency (ICRF) heated discharges, have been measured using bolometer arrays. An analysis of both Ohmic and ICRF‐heated discharges has demonstrated some of the relative merits of detached divertor operation versus high‐recycling divertor operation. An advantage of detached divertor operation is that the power flux to the divertor plates is decreased even further than its already low value. Some disadvantages are that volumetric losses outside the separatrix in the divertor region are decreased, the neutral compression ratio is decreased, and the penetration efficiency of impurities increases.

AB - The divertor of the Alcator C‐Mod tokamak [Phys. Plasmas 1, 1511 (1994)] routinely radiates a large fraction of the power entering the scrape‐off layer. This dissipative divertor operation occurs whether the divertor is detached or not, and large volumetric radiative emissivities, up to 60 MW m−3 in ion cyclotron range of frequency (ICRF) heated discharges, have been measured using bolometer arrays. An analysis of both Ohmic and ICRF‐heated discharges has demonstrated some of the relative merits of detached divertor operation versus high‐recycling divertor operation. An advantage of detached divertor operation is that the power flux to the divertor plates is decreased even further than its already low value. Some disadvantages are that volumetric losses outside the separatrix in the divertor region are decreased, the neutral compression ratio is decreased, and the penetration efficiency of impurities increases.

KW - ALCATOR DEVICE

KW - DEUTERIUM

KW - DIVERTORS

KW - ICR HEATING

KW - PLASMA DIAGNOSTICS

KW - PLASMA IMPURITIES

KW - PLASMA SCRAPE−OFF LAYER

KW - THERMONUCLEAR REACTIONS

UR - https://www.scopus.com/pages/publications/85015733304

UR - https://www.scopus.com/pages/publications/85015733304#tab=citedBy

U2 - 10.1063/1.871986

DO - 10.1063/1.871986

M3 - Article

SN - 1070-664X

VL - 3

SP - 1908

EP - 1915

JO - Physics of Plasmas

JF - Physics of Plasmas

IS - 5

ER -

Comparison of detached and radiative divertor operation in Alcator C‐Mod

Abstract

ASJC Scopus subject areas

Keywords

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