The effect of background fluctuation on velocity diagnostics is discussed and studied. The kinetic theory of Mach probe(MP) and the theory of BGK mode are combined to evaluate how the measurement of MP is affected by ...The effect of background fluctuation on velocity diagnostics is discussed and studied. The kinetic theory of Mach probe(MP) and the theory of BGK mode are combined to evaluate how the measurement of MP is affected by electrostatics fluctuation. It is found that the quantity of speed by the MP model is closer to the effective velocity in the picture of momentum flux rather than the real mean velocity, while, with high fluctuation, the fitting parameter of MP's exponential formula should be corrected.展开更多
基金supported by National Natural Science Foundation of China(Nos.11827810 and 11875177)International Atomic Energy Agency Research Contract No.22733the National Ten Thousand Talent Program。
文摘The effect of background fluctuation on velocity diagnostics is discussed and studied. The kinetic theory of Mach probe(MP) and the theory of BGK mode are combined to evaluate how the measurement of MP is affected by electrostatics fluctuation. It is found that the quantity of speed by the MP model is closer to the effective velocity in the picture of momentum flux rather than the real mean velocity, while, with high fluctuation, the fitting parameter of MP's exponential formula should be corrected.
