June 2026 | C. Exton | HTPD 2026 | Poster
Neutral beam shinethrough detectors on C-2W enable axial FRC density profile reconstruction validated against WarpX simulations, with augmented normalization yielding line-integrated densities consistent with Far-Infrared Interferometry measurements.
June 2026 | J. Wood | HTPD 2026 | Poster
A Lyman-alpha neutral density diagnostic implemented on C-2W reveals edge neutral profiles in FRC plasmas, with emissivity correlating positively with plasma loss rates, confirming fast-ion charge exchange as a significant energy loss mechanism and enabling 3D radial neutral density reconstruction.
June 2026 | Y. Zhou | HTPD 2026 | Poster
Dual-line-of-sight CHERS simultaneously measures radial and azimuthal thermal ion drifts in C-2W, showing azimuthal drifts significantly exceed radial drifts at r > 15 cm, consistent with FRC equilibrium models and confirming constant axial magnetic flux during stable operation.
June 2026 | S. Ohshima | HTPD 2026 | Poster
A new Fast Ion Loss Detector optimized for beam-driven FRC plasmas has been commissioned on C-2W, revealing catastrophic fast-ion transport across all energy and pitch-angle ranges during disruptions, with lower-energy ions exhibiting delayed response times.
June 2026 | Y. Fujiwara | HTPD 2026 | Poster
We report the first use of the Hamamatsu ORCA-Quest 2 camera for FIDA measurements on C-2W, achieving ~1000× greater signal intensity and 4.2× finer wavelength resolution. Spatially resolved fast-ion profiles reveal a sharp density increase near the separatrix, consistent with orbit-following…
June 2026 | S. Kamio | HTPD 2026 | Poster
We report direct experimental observation of the fast-ion axial bounce mode (ABM) in C-2W FRC plasmas using dual opposing Neutral Particle Analyzers. Antiphase fast-ion flux oscillations, energy-dependent time-of-flight delays, and multi-energy responses confirm the ABM model…