Trapped Flux
Magnetic flux confined within a plasma configuration (e.g., an FRC) that persists due to high conductivity. The lifetime of trapped flux determines how long the plasma can be confined before compression.
Verified Primary Sources
- → LANL Fusion Capabilities Presentation 2020 (p. 4) — 2020 — Los Alamos National Laboratory
- → LANL Fusion Capabilities Presentation 2020 (p. 5) — 2020 — Los Alamos National Laboratory
- → Nihon University Compact Toroid Injection 2016 (p. 1) — 2016 — Nihon University
- → Nihon University Compact Toroid Injection 2016 (p. 4) — 2016 — Nihon University
- → Nihon University Compact Toroid Injection 2016 (p. 5) — 2016 — Nihon University
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Timeline Mentions (8)
Project Sherwood established
The U.S. AEC's classified controlled-fusion program begins at LANL and partner labs.
Christofilos begins Astron experiment at LLNL
Greek engineer starts E-layer field reversal concept. Earliest compact torus conception. Presented at 1958 Geneva.
Christofilos Astron experiment at LLNL
The Astron experiment established the field-reversed configuration geometry that prefigured modern FRC research.
First Formal Documentation of FRC Topology
H.A.B. Bodin publishes a paper in Nuclear Fusion describing 'reversed field loops' within a theta-pinch, providing physical evidence of the FRC state.
Inertial-Confinement Flux-Trapping Model Proposed
T.S. Green and A.A. Newton propose that magnetic flux is lost via rapid convection at the radial Alfvén speed, a foundational theory for FRC formation.
Discovery of FRC Anomalous Stability
Experiments at LANL discover that Field-Reversed Configurations (FRCs) are significantly more stable than predicted by MHD theory.
Astron experiment funding cancelled at LLNL
16-year project ends without achieving field reversal. Compact torus concept disperses to spheromak and FRC research.
Christofilos Astron experiment cancelled at LLNL
17-year Astron project ends. Field reversal concept disperses to LANL (FRC) and LLNL/PPPL (spheromak).