American Fusion Inc. (OTCQB: AMFN) announced on August 27, 2026, new results from its Texatron Fusion Engine development and testing program. The technical team, led by Chief Technology Officer Dr. John E. Brandenburg, has achieved plasma confinement pressures of approximately 100,000 atmospheres on a repeatable basis, moving closer to the conditions required for deuterium–helium-3 (D–³He) fusion.
The Texatron is built around extremely short electromagnetic pulses designed to simultaneously create three fundamental conditions: extreme plasma temperature, high pressure and density, and sufficient confinement time. The company is targeting a plasma temperature of around 60 keV — roughly 700 million Kelvin — with a modeled confinement time of one microsecond. These are figures that place the Texatron firmly in experimental territory, though with a well-defined development roadmap.
The announcement compares two engine configurations. The 11-inch model, targeting approximately 500 kW, produces a simulated fusion energy per pulse of around 3.9 kJ. The 23-inch model, aimed at roughly 5 MW, has a plasma volume 8.36 times larger and could theoretically support 8.36 times the D–³He reactions per pulse, with a modeled energy output of approximately 32.6 kJ. The company was careful to note that these figures are based on calculations, not direct measurements: the larger size increases the potential number of reactions but does not in itself improve the fusion triple product or ignition conditions.
On the infrastructure front, a new portable vacuum chamber arrived at the company’s temporary development facility on August 26, supporting upcoming experiments. The next phase of the program will focus on D–³He ignition targets in the 50–200 keV range, integrating fusion yields and energy losses into the models. On the intellectual property side, American Fusion has surpassed 100 pending U.S. patent applications after filing 17 new applications in mid-August 2026, covering aluminum confinement structures, rifled toroidal chambers, He-3/deuterium fuel injection systems, and integrated engine architectures.
The company has also attracted attention from the financial community: Harbinger Research published an updated report titled “Advancing Modular Fusion Power Toward Commercial Validation,” reviewing the progress made from January 2026 to date, including the uplisting to the OTCQB market and the testing of the 5 MW engine at Texas Tech University. The long-term goal remains building a carbon-free fusion energy system for industrial, commercial, defense, and grid-support applications, built around a Power-as-a-Service delivery model. The next concrete milestone will be demonstrating the simultaneous convergence of adequate temperature, density, and confinement time — the true threshold toward ignition and net energy gain.
