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International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering (M&C 2025)
April 27–30, 2025
Denver, CO|The Westin Denver Downtown
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Dragonfly, a Pu-fueled drone heading to Titan, gets key NASA approval
Curiosity landed on Mars sporting a radioisotope thermoelectric generator (RTG) in 2012, and a second NASA rover, Perseverance, landed in 2021. Both are still rolling across the red planet in the name of science. Another exploratory craft with a similar plutonium-238–fueled RTG but a very different mission—to fly between multiple test sites on Titan, Saturn’s largest moon—recently got one step closer to deployment.
On April 25, NASA and the Johns Hopkins University Applied Physics Laboratory (APL) announced that the Dragonfly mission to Saturn’s icy moon passed its critical design review. “Passing this mission milestone means that Dragonfly’s mission design, fabrication, integration, and test plans are all approved, and the mission can now turn its attention to the construction of the spacecraft itself,” according to NASA.
Federico R. Casci, Ettore Minardi
Fusion Science and Technology | Volume 4 | Number 1 | July 1983 | Pages 170-175
Technical Paper | Magnet System | doi.org/10.13182/FST83-A22783
Articles are hosted by Taylor and Francis Online.
The basic parameters characterizing the burn control with the vertical field in an ignited tokamak are discussed in a zero-dimensional model assuming a single circuit for the vertical field and neglecting passive effects. The behavior of the system is determined by three dimensionless quantities: ξ which includes the effect of the mutual inductance; Ũ , related to the gain of the linear feedback; and A, related to the pressure, to the plasma current, and to the vertical field index. Analysis of the circuit equations and of the transport equation leads to the determination of stability regions in the parameter space. It is shown that the effect of the mutual inductance described by ξ is always relevant in the choice of the parameters for a stable burn. As a practical illustration the results are applied to the INTOR case.
