PUFF Capacitor Bank
ID: puff-capacitor-bank
Summary
72μF, 29nH, 120kV capacitor bank at AFWL Kirtland AFB. Drove coaxial plasma gun. Predecessor to Shiva Star system.
Overview
The PUFF Capacitor Bank was a pioneering high-voltage pulsed power system constructed at the Air Force Weapons Laboratory (AFWL) at Kirtland Air Force Base. Configured with an energy storage profile characterized by a 72 μF capacitance, an ultra-low system inductance of 29 nH, and an operating voltage of 120 kV, the apparatus was purpose-built to deliver megaampere-class electrical discharges in microsecond timeframes. Functioning as a primary capacitor bank, PUFF was predominantly utilized to energize coaxial plasma guns, generating high-velocity ionized gas discharges for high-energy density physics experiments. The engineering architecture pioneered on PUFF established fundamental design principles for fast-discharge energy storage networks, directly informing the development of next-generation megajoule-class systems later chronicled across our institutional network graph. Its low-inductance switching mechanics and transmission line geometries provided critical empirical validation for the scaling of military and laboratory pulsed-power installations.
Significance
The technical legacy of the PUFF Capacitor Bank lies in its role as the direct architectural predecessor to the renowned Shiva Star system at the Air Force Research Laboratory (AFRL). Engineering methodologies refined during PUFF's operation—particularly in handling high-current plasma loads—formed the baseline for advanced projects such as the MARAUDER program, which explored magnetically accelerated toroids. The hardware evolution that began with PUFF also influenced broader national laboratory infrastructure, culminating in major facilities like the Pegasus machine at Los Alamos National Laboratory and later contributions captured when the Atlas Pulsed Power Facility was commissioned. By validating rapid-discharge coaxial plasma gun drivers, PUFF established a technological lineage that extends to modern commercial and defense power-conditioning platforms, including developments pursued by General Atomics EMS.
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