Parametric raytracing modeling for NSTX-U scenario development with high harmonic fast waves and neutral beam injection

被引：0

作者：

Van Compernolle, B. ^{[1
]}

Jian, X. ^{[1
]}

Bertelli, N. ^{[2
]}

Desai, S. ^{[3
]}

Lestz, J. B. ^{[1
]}

McClenaghan, J. ^{[1
]}

Ono, M. ^{[2
]}

Pinsker, R., I ^{[1
]}

Thome, K. ^{[1
]}

机构：

[1] Gen Atom, San Diego, CA 92121 USA

[2] Princeton Plasma Phys Lab, Princeton, NJ 08540 USA

[3] Brown Univ, Providence, RI 02912 USA

来源：

PLASMA PHYSICS AND CONTROLLED FUSION | 2025年 / 67卷 / 06期

关键词：

parametric; raytracing; modeling; NSTX-U; scenarios; high harmonic fast wave; ION-CYCLOTRON HARMONICS; CURRENT DRIVE; ABSORPTION; ACCELERATION; PROPAGATION; EXPLORATION; PHYSICS;

D O I：

10.1088/1361-6587/addb75

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

High harmonic fast waves (HHFW) are a versatile heating and current drive tool for scenario development. Extensive modeling scans were performed to find optimal parameters for different uses of HHFW in National Spherical Tokamak Experiment (NSTX-U). Scans of plasma density, temperature, magnetic field, and antenna phasing were performed both with and without neutral beam injection. For speed of calculation, the ray-tracing code GENRAY coupled to the quasilinear Fokker-Planck code CQL3D was used. CQL3D allows for a more accurate description of the fast ion population, as well as for quasilinear effects such as HHFW-induced modifications of the distribution function. Best current drive results are obtained at elevated electron temperatures and with the lowest k phi phasing. Adding neutral beams however typically strongly reduces the HHFW current drive efficiency at the low density cases due to HHFW absorption on beam ions. Results of this parametric study will feed into scenario development and predict-first whole-shot modeling of NSTX-U discharges.

引用

页数：16

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