High non-inductive fraction H-mode discharges generated by high-harmonic fast wave heating and current drive in the National Spherical Torus Experiment

2012 ◽  
Vol 19 (4) ◽  
pp. 042501 ◽  
Author(s):  
G. Taylor ◽  
J. C. Hosea ◽  
C. E. Kessel ◽  
B. P. LeBlanc ◽  
D. Mueller ◽  
...  
Keyword(s):  
High Harmonic ◽  
Current Drive ◽  
Fast Wave ◽  
Spherical Torus ◽  
Fraction H ◽  
Wave Heating

High harmonic fast wave heating efficiency enhancement and current drive at longer wavelength on the National Spherical Torus Experiment

2008 ◽  
Vol 15 (5) ◽  
pp. 056104 ◽  
Author(s):  
J. Hosea ◽  
R. E. Bell ◽  
B. P. LeBlanc ◽  
C. K. Phillips ◽  
G. Taylor ◽  
...  
Keyword(s):  
High Harmonic ◽  
Current Drive ◽  
Fast Wave ◽  
Efficiency Enhancement ◽  
Spherical Torus ◽  
Heating Efficiency ◽  
Wave Heating

Phase coherence of parametric-decay modes during high-harmonic fast-wave heating in the National Spherical Torus Experiment

2016 ◽  
Vol 23 (6) ◽  
pp. 062519
Author(s):  
J. A. Carlsson ◽  
J. R. Wilson ◽  
J. C. Hosea ◽  
N. L. Greenough ◽  
R. J. Perkins
Keyword(s):  
High Harmonic ◽  
Phase Coherence ◽  
Fast Wave ◽  
Spherical Torus ◽  
Decay Modes ◽  
Parametric Decay ◽  
Wave Heating

scholarly journals Exploration of High Harmonic Fast Wave Heating on the National Spherical Torus Experiment

2003 ◽  
Author(s):  
J.R. Wilson ◽  
R.E. Bell ◽  
S. Bernabei ◽  
M. Bitter ◽  
P. Bonoli ◽  
...  
Keyword(s):  
High Harmonic ◽  
Fast Wave ◽  
Spherical Torus ◽  
Wave Heating

Spectroscopic evidence for high harmonic fast wave heating in the CDX-U spherical torus

1999 ◽  
Vol 41 (7) ◽  
pp. 867-879 ◽  
Author(s):  
D Stutman ◽  
M Finkenthal ◽  
V Soukhanovskii ◽  
J Menard ◽  
T Munsat ◽  
...  
Keyword(s):  
High Harmonic ◽  
Fast Wave ◽  
Spherical Torus ◽  
Spectroscopic Evidence ◽  
Wave Heating

scholarly journals Exploration of high harmonic fast wave heating on the National Spherical Torus Experiment

2003 ◽  
Vol 10 (5) ◽  
pp. 1733-1738 ◽  
Author(s):  
J. R. Wilson ◽  
R. E. Bell ◽  
S. Bernabei ◽  
M. Bitter ◽  
P. Bonoli ◽  
...  
Keyword(s):  
High Harmonic ◽  
Fast Wave ◽  
Spherical Torus ◽  
Wave Heating

High harmonic fast wave heating and current drive on NSTX-system and experimental plan

1999 ◽  
Author(s):  
J. R. Wilson ◽  
S. Bernabei ◽  
M. Carter ◽  
R. Ellis ◽  
J. C. Hosea ◽  
...  
Keyword(s):  
High Harmonic ◽  
Current Drive ◽  
Fast Wave ◽  
Wave Heating ◽  
Experimental Plan

Fast ion absorption of the high harmonic fast wave in the National Spherical Torus Experiment

2004 ◽  
Vol 11 (5) ◽  
pp. 2441-2452 ◽  
Author(s):  
A. L. Rosenberg ◽  
J. E. Menard ◽  
J. R. Wilson ◽  
S. S. Medley ◽  
R. Andre ◽  
...  
Keyword(s):  
High Harmonic ◽  
Fast Wave ◽  
Spherical Torus ◽  
Ion Absorption ◽  
Fast Ion

Resonant wave-filament interactions as a loss mechanism for HHFW heating and current drive

2021 ◽  
Author(s):  
Wouter Tierens ◽  
James R Myra ◽  
Roberto Bilato ◽  
Laurent Colas
Keyword(s):  
Surface Wave ◽  
Surface Waves ◽  
High Harmonic ◽  
Current Drive ◽  
Fast Wave ◽  
Power Losses ◽  
Loss Mechanism ◽  
Resonant Wave ◽  
Plasma Filaments ◽  
Analytic Expression

Abstract Perkins et al. PRL 2012 [1] reported unexpected power losses during High Harmonic Fast Wave (HHFW) heating and current drive in NSTX. Recently, Tierens et al [2] proposed that these losses may be attributable to surface waves on field-aligned plasma filaments, which carry power along the filaments, to be lost at the endpoints where the filaments intersect the limiters. In this work, we show that there is indeed a resonant loss mechanism associated with the excitation of these surface waves, and derive an analytic expression for the power lost to surface wave modes at each filament.

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