Measurements of the high confinement mode pedestal region on Alcator C-Mod

A. E. Hubbard; R. L. Boivin; R. S. Granetz; M. Greenwald; I. H. Hutchinson; J. H. Irby; Y. In; J. Kesner; B. LaBombard; Y. Lin; J. E. Rice; T. Sunn Pedersen; J. A. Snipes; P. C. Stek; Y. Takase; S. M. Wolfe; S. Wukitch

doi:10.1063/1.872843

Measurements of the high confinement mode pedestal region on Alcator C-Mod

A. E. Hubbard
, R. L. Boivin
, R. S. Granetz
, M. Greenwald
, I. H. Hutchinson
, J. H. Irby
, Y. In
, J. Kesner
, B. LaBombard
, Y. Lin
, J. E. Rice
, T. Sunn Pedersen
, J. A. Snipes
, P. C. Stek
, Y. Takase
, S. M. Wolfe
, S. Wukitch

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

44 Scopus citations

Abstract

Measurements of the steep transport barrier at the edge of the Alcator C-Mod tokamak [I. H. Hutchinson et al., Phys. Plasmas 1, 1511 (1994)] are presented. The parameters at the top of this barrier are in the range T_e = 150-750 eV and n_e = 0.5-3.3 × 10²⁰ m^-3, depending on the confinement regime. Type III edge localized modes (ELMs) have an upper temperature limit. T_e pedestal profiles show a barrier width Δ_T≃8 mm. Soft x-ray emissivity profiles are narrower, with Δ = 2-4 mm. Edge currents are calculated to alter the ideal stability boundary favorably, leading to ideally stable pedestal profiles. High frequency, broadband, edge density fluctuations are sometimes observed in H-mode (high-confinement mode) and are associated with enhanced particle transport. Coherent magnetic fluctuations localized near the pedestal are also seen.

Original language	English (US)
Pages (from-to)	1744-1751
Number of pages	8
Journal	Physics of Plasmas
Volume	5
Issue number	5 PART 1
DOIs	https://doi.org/10.1063/1.872843
State	Published - May 1998
Externally published	Yes

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

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10.1063/1.872843

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Hubbard, A. E., Boivin, R. L., Granetz, R. S., Greenwald, M., Hutchinson, I. H., Irby, J. H., In, Y., Kesner, J., LaBombard, B., Lin, Y., Rice, J. E., Sunn Pedersen, T., Snipes, J. A., Stek, P. C., Takase, Y., Wolfe, S. M., & Wukitch, S. (1998). Measurements of the high confinement mode pedestal region on Alcator C-Mod. Physics of Plasmas, 5(5 PART 1), 1744-1751. https://doi.org/10.1063/1.872843

@article{5e4b86a7134947238d9e860137766ccc,

title = "Measurements of the high confinement mode pedestal region on Alcator C-Mod",

abstract = "Measurements of the steep transport barrier at the edge of the Alcator C-Mod tokamak [I. H. Hutchinson et al., Phys. Plasmas 1, 1511 (1994)] are presented. The parameters at the top of this barrier are in the range Te = 150-750 eV and ne = 0.5-3.3 × 1020 m-3, depending on the confinement regime. Type III edge localized modes (ELMs) have an upper temperature limit. Te pedestal profiles show a barrier width ΔT≃8 mm. Soft x-ray emissivity profiles are narrower, with Δ = 2-4 mm. Edge currents are calculated to alter the ideal stability boundary favorably, leading to ideally stable pedestal profiles. High frequency, broadband, edge density fluctuations are sometimes observed in H-mode (high-confinement mode) and are associated with enhanced particle transport. Coherent magnetic fluctuations localized near the pedestal are also seen.",

author = "Hubbard, \{A. E.\} and Boivin, \{R. L.\} and Granetz, \{R. S.\} and M. Greenwald and Hutchinson, \{I. H.\} and Irby, \{J. H.\} and Y. In and J. Kesner and B. LaBombard and Y. Lin and Rice, \{J. E.\} and \{Sunn Pedersen\}, T. and Snipes, \{J. A.\} and Stek, \{P. C.\} and Y. Takase and Wolfe, \{S. M.\} and S. Wukitch",

year = "1998",

month = may,

doi = "10.1063/1.872843",

language = "English (US)",

volume = "5",

pages = "1744--1751",

journal = "Physics of Plasmas",

issn = "1070-664X",

publisher = "American Institute of Physics",

number = "5 PART 1",

}

Hubbard, AE, Boivin, RL, Granetz, RS, Greenwald, M, Hutchinson, IH, Irby, JH, In, Y, Kesner, J, LaBombard, B, Lin, Y, Rice, JE, Sunn Pedersen, T, Snipes, JA, Stek, PC, Takase, Y, Wolfe, SM & Wukitch, S 1998, 'Measurements of the high confinement mode pedestal region on Alcator C-Mod', Physics of Plasmas, vol. 5, no. 5 PART 1, pp. 1744-1751. https://doi.org/10.1063/1.872843

TY - JOUR

T1 - Measurements of the high confinement mode pedestal region on Alcator C-Mod

AU - Hubbard, A. E.

AU - Boivin, R. L.

AU - Granetz, R. S.

AU - Greenwald, M.

AU - Hutchinson, I. H.

AU - Irby, J. H.

AU - In, Y.

AU - Kesner, J.

AU - LaBombard, B.

AU - Lin, Y.

AU - Rice, J. E.

AU - Sunn Pedersen, T.

AU - Snipes, J. A.

AU - Stek, P. C.

AU - Takase, Y.

AU - Wolfe, S. M.

AU - Wukitch, S.

PY - 1998/5

Y1 - 1998/5

N2 - Measurements of the steep transport barrier at the edge of the Alcator C-Mod tokamak [I. H. Hutchinson et al., Phys. Plasmas 1, 1511 (1994)] are presented. The parameters at the top of this barrier are in the range Te = 150-750 eV and ne = 0.5-3.3 × 1020 m-3, depending on the confinement regime. Type III edge localized modes (ELMs) have an upper temperature limit. Te pedestal profiles show a barrier width ΔT≃8 mm. Soft x-ray emissivity profiles are narrower, with Δ = 2-4 mm. Edge currents are calculated to alter the ideal stability boundary favorably, leading to ideally stable pedestal profiles. High frequency, broadband, edge density fluctuations are sometimes observed in H-mode (high-confinement mode) and are associated with enhanced particle transport. Coherent magnetic fluctuations localized near the pedestal are also seen.

AB - Measurements of the steep transport barrier at the edge of the Alcator C-Mod tokamak [I. H. Hutchinson et al., Phys. Plasmas 1, 1511 (1994)] are presented. The parameters at the top of this barrier are in the range Te = 150-750 eV and ne = 0.5-3.3 × 1020 m-3, depending on the confinement regime. Type III edge localized modes (ELMs) have an upper temperature limit. Te pedestal profiles show a barrier width ΔT≃8 mm. Soft x-ray emissivity profiles are narrower, with Δ = 2-4 mm. Edge currents are calculated to alter the ideal stability boundary favorably, leading to ideally stable pedestal profiles. High frequency, broadband, edge density fluctuations are sometimes observed in H-mode (high-confinement mode) and are associated with enhanced particle transport. Coherent magnetic fluctuations localized near the pedestal are also seen.

UR - https://www.scopus.com/pages/publications/0000340912

UR - https://www.scopus.com/pages/publications/0000340912#tab=citedBy

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AN - SCOPUS:0000340912

SN - 1070-664X

VL - 5

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EP - 1751

JO - Physics of Plasmas

JF - Physics of Plasmas

IS - 5 PART 1

ER -

Measurements of the high confinement mode pedestal region on Alcator C-Mod

Abstract

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