Electron Heating in the Fueling Region of C-2W

November 2025 | Y. Zhou | APS DPP 2025 | Poster

Fast ions confined by the FRC likely cause electrons in the FR to heat up and emit X-rays. We plan to identify the exact location of electron heating by improving the spatial resolution of the X-ray diagnostic. The X-ray diagnostic will also be used to study electron heating induced by an Electron Cyclotron Resonance…

Study of the fast-ion acceleration due to the beam-driven modes in C-2W

November 2025 | S. Kamio | APS DPP 2025 | Poster

In C-2U experiments, thermal ion acceleration by a beam-driven wave was observed [R. M. Magee et al. Nat. Phys. 15, 281–286 (2019)]. This thermal ion acceleration is pointed out to dramatically enhance the fusion rate because the beam energy is transferred to thermal ions, bypassing the electron channel…

Development of New Ion Energy Analyzer for the Energy- and Pitch-Angle-Resolved Measurement for Studying Beam-Driven Field-Reversed Configuration Plasma

November 2025 | S. Ohshima | APS DPP 2025 | Poster

A new ion energy analyzer for energy- and pitch-angle-resolved measurement has been designed and developed, being optimized for beam-driven FRC, C-2W

Peak density detection and fluctuation properties near the null-field radius in C-2W Field-Reversed Configuration (FRC) plasmas

November 2025 | L. Schmitz | APS DPP 2025 | Poster

Doppler Backscattering hardware has been used to detect the density peak in C-2W FRC plasmas from transmission/reflection transitions.
Main result: The peak density reconstructed from FIR Interferometry (via ABEL inversion) is on average 20-25% lower than the peak density determined via DBS.

Validation of Helium Line-Ratio Spectroscopy for Electron Temperature and Density Measurements in the Fueling Region of C-2W

November 2025 | L. Jian | APS DPP 2025 | Poster

High-fidelity measurements of plasma parameters in the fueling region of the C-2W field-reversed configuration (FRC) device [1] are essential for assessing neutral fueling efficiency, stability characteristics, and tandem confinement properties.