Momentum injection in tokamak plasmas and transitions to reduced transport

F. I. Parra; M. Barnes; E. G. Highcock; A. A. Schekochihin; S. C. Cowley

doi:10.1103/PhysRevLett.106.115004

Momentum injection in tokamak plasmas and transitions to reduced transport

F. I. Parra, M. Barnes, E. G. Highcock, A. A. Schekochihin, S. C. Cowley

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

25 Scopus citations

Abstract

The effect of momentum injection on the temperature gradient in tokamak plasmas is studied. A plausible scenario for transitions to reduced transport regimes is proposed. The transition happens when there is sufficient momentum input so that the velocity shear can suppress or reduce the turbulence. However, it is possible to drive too much velocity shear and rekindle the turbulent transport. The optimal level of momentum injection is determined. The reduction in transport is maximized in the regions of low or zero magnetic shear.

Original language	English (US)
Article number	115004
Journal	Physical review letters
Volume	106
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevLett.106.115004
State	Published - Mar 18 2011
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

Access to Document

10.1103/PhysRevLett.106.115004

Cite this

@article{0655aa96f0df4ce0a640beeb4477717a,

title = "Momentum injection in tokamak plasmas and transitions to reduced transport",

abstract = "The effect of momentum injection on the temperature gradient in tokamak plasmas is studied. A plausible scenario for transitions to reduced transport regimes is proposed. The transition happens when there is sufficient momentum input so that the velocity shear can suppress or reduce the turbulence. However, it is possible to drive too much velocity shear and rekindle the turbulent transport. The optimal level of momentum injection is determined. The reduction in transport is maximized in the regions of low or zero magnetic shear.",

author = "Parra, {F. I.} and M. Barnes and Highcock, {E. G.} and Schekochihin, {A. A.} and Cowley, {S. C.}",

year = "2011",

month = mar,

day = "18",

doi = "10.1103/PhysRevLett.106.115004",

language = "English (US)",

volume = "106",

journal = "Physical review letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "11",

}

TY - JOUR

T1 - Momentum injection in tokamak plasmas and transitions to reduced transport

AU - Parra, F. I.

AU - Barnes, M.

AU - Highcock, E. G.

AU - Schekochihin, A. A.

AU - Cowley, S. C.

PY - 2011/3/18

Y1 - 2011/3/18

N2 - The effect of momentum injection on the temperature gradient in tokamak plasmas is studied. A plausible scenario for transitions to reduced transport regimes is proposed. The transition happens when there is sufficient momentum input so that the velocity shear can suppress or reduce the turbulence. However, it is possible to drive too much velocity shear and rekindle the turbulent transport. The optimal level of momentum injection is determined. The reduction in transport is maximized in the regions of low or zero magnetic shear.

AB - The effect of momentum injection on the temperature gradient in tokamak plasmas is studied. A plausible scenario for transitions to reduced transport regimes is proposed. The transition happens when there is sufficient momentum input so that the velocity shear can suppress or reduce the turbulence. However, it is possible to drive too much velocity shear and rekindle the turbulent transport. The optimal level of momentum injection is determined. The reduction in transport is maximized in the regions of low or zero magnetic shear.

UR - http://www.scopus.com/inward/record.url?scp=79952851879&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79952851879&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.106.115004

DO - 10.1103/PhysRevLett.106.115004

M3 - Article

C2 - 21469870

AN - SCOPUS:79952851879

SN - 0031-9007

VL - 106

JO - Physical review letters

JF - Physical review letters

IS - 11

M1 - 115004

ER -

Momentum injection in tokamak plasmas and transitions to reduced transport

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this