Abstract
| Original language | English |
|---|---|
| Title of host publication | 59th Annual Meeting of the APS Division of Plasma Physics |
| Publication status | Published - 2017 |
| Event | 59th Annual Meeting of the APS Division of Plasma Physics - Milwaukee, United States Duration: 23 Oct 2017 → 27 Oct 2017 |
Publication series
| Series | Bulletin of the American Physical Society |
|---|---|
| Number | 12 |
| Volume | 62 |
Conference
| Conference | 59th Annual Meeting of the APS Division of Plasma Physics |
|---|---|
| Country | United States |
| City | Milwaukee |
| Period | 23/10/17 → 27/10/17 |
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Keywords
- DIII-D
- fusion
- tokamak
- energy
- plasma
- transport
- momentum transport
Cite this
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Advances in understanding and control of plasma rotation on DIII-D. / Grierson, B.; Logan, N.; Haskey, S.; Ashourvan, A.; Ernst, D.; Chrystal, C.; Degrassie, J.; Boedo, J.; Tala, T.; Salmi, A.
59th Annual Meeting of the APS Division of Plasma Physics. 2017. BAPS.2017.DPP.BO4.7 (Bulletin of the American Physical Society; No. 12, Vol. 62).Research output: Chapter in Book/Report/Conference proceeding › Conference abstract in proceedings › Scientific
TY - CHAP
T1 - Advances in understanding and control of plasma rotation on DIII-D
AU - Grierson, B.
AU - Logan, N.
AU - Haskey, S.
AU - Ashourvan, A.
AU - Ernst, D.
AU - Chrystal, C.
AU - Degrassie, J.
AU - Boedo, J.
AU - Tala, T.
AU - Salmi, A.
N1 - Abstract #BO4.007
PY - 2017
Y1 - 2017
N2 - Momentum transport experiments on DIII-D have advanced our understanding of the origin of core and edge rotation by showing that (1) core rotation in low-torque electron-heated ITER-like plasmas displays hollowing driven by turbulence in the absence of MHD, (2) intrinsic rotation in torque-free electron-heated plasmas follows the favorable rho* and nu* scalings as previously found in intrinsic torque experiments using NBI, (3) the edge plasma rotation can be controlled through shaping of triangularity and X-point radius, and (4) rotation and density profiles have separate dependencies on the applied 3D field spectra. These advances inform strategies to avoid low torque disruptions by tailoring turbulent modes that minimize rotation hollowing, and provide confidence in dimensionless scaling of intrinsic torque and rotation to ITER. The triangularity and X-point position provide important new actuators on the rotation beyond neutral beam injection that are available for any diverted tokamak including ITER. The separate spectral dependencies of the momentum and density explain how quiescent braking as well as edge isolated ELM control are possible even in machines with limited toroidal harmonic EFC coils.
AB - Momentum transport experiments on DIII-D have advanced our understanding of the origin of core and edge rotation by showing that (1) core rotation in low-torque electron-heated ITER-like plasmas displays hollowing driven by turbulence in the absence of MHD, (2) intrinsic rotation in torque-free electron-heated plasmas follows the favorable rho* and nu* scalings as previously found in intrinsic torque experiments using NBI, (3) the edge plasma rotation can be controlled through shaping of triangularity and X-point radius, and (4) rotation and density profiles have separate dependencies on the applied 3D field spectra. These advances inform strategies to avoid low torque disruptions by tailoring turbulent modes that minimize rotation hollowing, and provide confidence in dimensionless scaling of intrinsic torque and rotation to ITER. The triangularity and X-point position provide important new actuators on the rotation beyond neutral beam injection that are available for any diverted tokamak including ITER. The separate spectral dependencies of the momentum and density explain how quiescent braking as well as edge isolated ELM control are possible even in machines with limited toroidal harmonic EFC coils.
KW - DIII-D
KW - fusion
KW - tokamak
KW - energy
KW - plasma
KW - transport
KW - momentum transport
M3 - Conference abstract in proceedings
T3 - Bulletin of the American Physical Society
BT - 59th Annual Meeting of the APS Division of Plasma Physics
ER -