9/15/2023 0 Comments Robert adams nasa huntsville alAdd orbital maneuvers near the two planets, and you quickly get close to 100 km/s delta-v. Plugging in pi/2 radians and the above speeds gives ~47 and ~38 km/s for 90 deg turns at Earth and Mars. Where θ is the turn angle in radians, and v and dv have the same units. The delta-v for a circular turn at constant speed is: For shortest transfer times, you more or less want to turn 90 deg from the source planet’s orbit around the Sun (give or take, depending on the relative positions of the source and destination), go straight towards the destination, then turn into the destination planet’s orbit.Īs an example, for Earth and Mars, their orbital speeds are 30 and 24 km/s, respectively. I don’t think it’s overkill for interplanetary. The processes boost each other’s reaction rates. The fusion products then enhance fission reaction. The fission process heats the fusion fuel, increasing the fusion reaction rate. The Pulsed Fission-Fusion (PuFF) concept engine uses a z-pinch configuration with a fusion core and a fission liner to boost energy production and reduce power required to drive the reaction, hence a hybrid target. The PuFF engine research seeks to operate and take advantage of the MIF regime. Research into this method suggests this approach may offer a means of achieving the conditions necessary for nuclear fusion. This drastically reduces the driving energy required. Magnetic Confinement Fusion (MCF) also known as Magnetized Target Fusion (MTF) operates at an intermediate density regime and employs a magnetic field to trap charge particles in order to reduce energy lost. These methods struggle to reach the temperatures required due to limitations of materials and instabilities that arise in both processes. MCF contains plasma at a steady state at low densities as opposed to ICF which implodes small quantities of fuel in ultra-short high-density reactions. Research has focused largely on Magnetic Confinement Fusion (MCF) and Inertial Confinement Fusion (ICF). Higher currents and pulse rates will enable 3d printing with high-temperature metals without high pressures and with better grains and finish. They will be able to work with high-temperature metals. They could also develop advances in 3d printing of metals. Tc-99m is used for the detection of disease and for the study of organ structure and function. The decay product of Mo-99, Tc-99m, is the workhorse isotope in nuclear medicine for diagnostic imaging. Fission Molybdenum-99 is used in nuclear medicine. There are potential spinoff materials and technology from their project. They are doing many experiments to validate and create designs and they are doing computational models and simulations. This concept has been examined in the past by Winterberg and is being investigated in support of a Pulsed Fission-Fusion (PuFF) engine concept at Marshall Space Flight Center and the University of Alabama in Huntsville. This coupling can drastically reduce the driving energy required to initiate the burn and drastically improve output. Additionally, the neutron flux from the fusion fuel will induce fission. Heat from fission fuel increases the reactivity of the fusion fuel and the neutron flux may breed additional fuel to fuse. Puff will meet an unfilled capability needed for manned missions to the outer planets and vastly faster travel throughout the solar system.Ī tiny lithium deuteride and uranium 235 pellet will be fired into a shell of structure that will complete a circuit and generate high voltages and pressures that will compress the pellet and cause fission and fusion to occur. This will be orders of magnitude improvement over competing systems such as nuclear electric, solar electric, and nuclear thermal propulsion that suffer from lower available power and inefficient thermodynamic cycles. This system should be able to achieve 15 kW/kg and 30,000 seconds of ISP. Robert works at the NASA Marshall Space Flight Center. Robert Adams updated the work on a phase 2 Pulsed Fission-Fusion (PuFF) Propulsion Concept.
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