Enhanced confinement and stability in DIII-D discharges with reversed magnetic shear

E. J. Strait; L. L. Lao; M. E. Mauel; B. W. Rice; T. S. Taylor; K. H. Burrell; Ming-Sheng Chu; E. A. Lazarus; T. H. Osborne; S. J. Thompson; A. D. Turnbull

doi:10.1103/PhysRevLett.75.4421

Enhanced confinement and stability in DIII-D discharges with reversed magnetic shear

E. J. Strait, L. L. Lao, M. E. Mauel, B. W. Rice, T. S. Taylor, K. H. Burrell, Ming-Sheng Chu, E. A. Lazarus, T. H. Osborne, S. J. Thompson, A. D. Turnbull

College of Sciences

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

511 Citations (Scopus)

Abstract

Peaked pressure profiles and central ion temperatures up to 20 keV are observed in DIII-D H-mode discharges with a central region of strongly reversed magnetic shear. Short wavelength ballooning modes are stabilized by access to the second stable regime, longer wavelength modes by a conducting wall and possibly by rotational shear. Values of normalized beta, N=aBI, up to 4 (%-m-T/MA), energy confinement are a factor of 3 better than L mode, and at least 50% of the noninductive plasma current in this regime demonstrates compatibility with requirements for a steady-state high-beta tokamak power plant.

Original language	English
Pages (from-to)	4421-4424
Number of pages	4
Journal	Physical review letters
Volume	75
Issue number	24
DOIs	https://doi.org/10.1103/PhysRevLett.75.4421
Publication status	Published - 1995 Jan 1

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

Access to Document

10.1103/PhysRevLett.75.4421

Fingerprint Dive into the research topics of 'Enhanced confinement and stability in DIII-D discharges with reversed magnetic shear'. Together they form a unique fingerprint.

Cite this

@article{e3bbeaa6d7484771b1650412ad9971d6,

title = "Enhanced confinement and stability in DIII-D discharges with reversed magnetic shear",

abstract = "Peaked pressure profiles and central ion temperatures up to 20 keV are observed in DIII-D H-mode discharges with a central region of strongly reversed magnetic shear. Short wavelength ballooning modes are stabilized by access to the second stable regime, longer wavelength modes by a conducting wall and possibly by rotational shear. Values of normalized beta, N=aBI, up to 4 (%-m-T/MA), energy confinement are a factor of 3 better than L mode, and at least 50% of the noninductive plasma current in this regime demonstrates compatibility with requirements for a steady-state high-beta tokamak power plant.",

author = "Strait, {E. J.} and Lao, {L. L.} and Mauel, {M. E.} and Rice, {B. W.} and Taylor, {T. S.} and Burrell, {K. H.} and Ming-Sheng Chu and Lazarus, {E. A.} and Osborne, {T. H.} and Thompson, {S. J.} and Turnbull, {A. D.}",

year = "1995",

month = jan,

day = "1",

doi = "10.1103/PhysRevLett.75.4421",

language = "English",

volume = "75",

pages = "4421--4424",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "24",

}

Enhanced confinement and stability in DIII-D discharges with reversed magnetic shear. / Strait, E. J.; Lao, L. L.; Mauel, M. E.; Rice, B. W.; Taylor, T. S.; Burrell, K. H.; Chu, Ming-Sheng; Lazarus, E. A.; Osborne, T. H.; Thompson, S. J.; Turnbull, A. D.

In: Physical review letters, Vol. 75, No. 24, 01.01.1995, p. 4421-4424.

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

TY - JOUR

T1 - Enhanced confinement and stability in DIII-D discharges with reversed magnetic shear

AU - Strait, E. J.

AU - Lao, L. L.

AU - Mauel, M. E.

AU - Rice, B. W.

AU - Taylor, T. S.

AU - Burrell, K. H.

AU - Chu, Ming-Sheng

AU - Lazarus, E. A.

AU - Osborne, T. H.

AU - Thompson, S. J.

AU - Turnbull, A. D.

PY - 1995/1/1

Y1 - 1995/1/1

N2 - Peaked pressure profiles and central ion temperatures up to 20 keV are observed in DIII-D H-mode discharges with a central region of strongly reversed magnetic shear. Short wavelength ballooning modes are stabilized by access to the second stable regime, longer wavelength modes by a conducting wall and possibly by rotational shear. Values of normalized beta, N=aBI, up to 4 (%-m-T/MA), energy confinement are a factor of 3 better than L mode, and at least 50% of the noninductive plasma current in this regime demonstrates compatibility with requirements for a steady-state high-beta tokamak power plant.

AB - Peaked pressure profiles and central ion temperatures up to 20 keV are observed in DIII-D H-mode discharges with a central region of strongly reversed magnetic shear. Short wavelength ballooning modes are stabilized by access to the second stable regime, longer wavelength modes by a conducting wall and possibly by rotational shear. Values of normalized beta, N=aBI, up to 4 (%-m-T/MA), energy confinement are a factor of 3 better than L mode, and at least 50% of the noninductive plasma current in this regime demonstrates compatibility with requirements for a steady-state high-beta tokamak power plant.

UR - http://www.scopus.com/inward/record.url?scp=6144267768&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=6144267768&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.75.4421

DO - 10.1103/PhysRevLett.75.4421

M3 - Article

AN - SCOPUS:6144267768

VL - 75

SP - 4421

EP - 4424

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 24

ER -