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

Access to Document

10.1063/1.872843

Cite this

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/inward/citedby.url?scp=0000340912&partnerID=8YFLogxK

U2 - 10.1063/1.872843

DO - 10.1063/1.872843

M3 - Article

AN - SCOPUS:0000340912

SN - 1070-664X

VL - 5

SP - 1744

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

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this