The objective of the current MHD acceleration study is to thoroughly explain the compact experimental demo of MHD accelerator and to clarify some significant plasma variables both within and at the exit of the newly introduced mullite ceramic compact channel. The significant challenge of the current study is to use the 0.4-tesla neodymium magnetic as an MHD source, while the model rocket engine (C6-0, ESTES) is introduced and employed as a gas (plasma) source. The results of present demonstrations reveal that the highest gas velocity was calculated at 117.2 m/s using the gas pressure measurement through the pitot tube. The TOF method using two photo diodes showed the slowest speed of 50 m/s.
This paper presents a method for enhancing the ablation plasma production and the flyer velocity for flyer acceleration. A significant approach introduced is to optimize the interaction field of the ablation plasma and the Al target. To do so, it is acceptable to adjust the distance of ion beam irradiation. A one-dimensional hydrodynamic model is used in the calculations. The cube-interpolated propagation (CIP) method is used to describe the ablation plasma production and the acceleration mechanism. In the calculations, a single-pulsed ion beam with a total energy density of 120 J/cm2 is used. The interaction field (ion beam irradiation distance) that varies from 50 to 1000 µm is fixed for the calculations. At the interaction field of 50 µm, the flyer velocity of 2 km/s is calculated, while the value of 1.3 km/s is obtained at the distance of 400 µm. The results show that the closer the interaction field (distance of ion beam irradiation), the higher the flyer velocity obtained. In addition, the results reveal that the interaction field directly affects the amount of the ablation plasma produced and the flyer momentum.
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