| Issue |
EPJ Web Conf.
Volume 346, 2026
25th Topical Conference on Radio-Frequency Power in Plasmas (RFPPC2025)
|
|
|---|---|---|
| Article Number | 02015 | |
| Number of page(s) | 5 | |
| Section | Wave Heating and Current Drive in Present and Future Fusion Devices | |
| DOI | https://doi.org/10.1051/epjconf/202634602015 | |
| Published online | 07 January 2026 | |
https://doi.org/10.1051/epjconf/202634602015
Evaluation of DIII-D plasmas for Future Measurements of the Driven Current Density in the DIII-D High Field Side Lower Hybrid Experiment
1 Massachusetts Institute of Technology, Plasma Science and Fusion Center
2 Lawrence Livermore National Laboratory
* Corresponding author: rantr@mit.edu
Published online: 7 January 2026
High field side (HFS) lower hybrid current drive (LHCD) is a promising method for efficiently driving off-axis current in steady state tokamak power plants. The first test of this technology is underway at the DIII-D tokamak. The initial physics goal is to measure the LH-driven current density profile in order to validate the ray-tracing/Fokker-Plank codes GENRAY/CQL3D and gain confidence in their ability to predict LH deposition in future DIII-D experiments and fusion power plants. DIII-D’s motional Stark effect (MSE) diagnostic will be used to constrain the magnetic equilibrium reconstructions. From these reconstructions, the ohmic, bootstrap, and driven non-inductive components of the current density profile can be extracted. Several recent DIII-D plasmas have been identified in which GENRAY/CQL3D predict measurable amounts of current with only 100 kW of coupled power.
© The Authors, published by EDP Sciences, 2026
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