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…
February 2026 | S. Kamio | Nuclear Fusion | Paper
Among various advanced fuel cycles, proton-boron-11 (p-11B) fusion has attracted renewed interest as a potentially clean and sustainable fusion energy source.
This aneutronic fusion concept has long been envisioned as an ultimate cleaner fusion reactor scheme…
November 2025 | S. Kamio | 2025 US-Japan FRC Workshop | Presentation
ICRF heating in LHD clearly accelerates fast ions and enhances p-¹¹B fusion yield. In the FRC device C-2W, fast-ion acceleration is also observed together with beam-driven modes. The n = 2 mode can accelerate NB-injected ions to nearly twice their initial energy…
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…
October 2022 | S. Kamio | APS-DPP 2022 | Poster
Fast ion tail was observed at more than the injection beam energy of 15 keV. In particular, the effective tail temperature of fast deuterium ion was notably high