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Latest News
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.
Chan K. Choi, Ming-Yuan Hsiao
Fusion Science and Technology | Volume 3 | Number 2 | March 1983 | Pages 273-279
Technical Paper | Special Section Content | doi.org/10.13182/FST83-A20850
Articles are hosted by Taylor and Francis Online.
Calculations of the energy loss rates from the unified theory are compared with those of other theories (e.g., binary collision theory and the wave theory) to study the accuracy and validity of each theory under various plasma regimes. The unified theory combines the binary collision theory and the collective wave theory, and is more accurate for wide ranges of plasma parameters and for entire interaction ranges (0 ≤ r ≤ ∞). Moreover, the present unified slowing down formalism is not any more complicated than the widely used binary collisional treatment and, consequently, it provides a usable expression in the study of energetic charged fusion product transport in both magnetic and inertial fusion plasmas.
