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1篇 您的检索式:作者名="Mariammal MEGALINGAM"
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1Occurrence of ionization instability associated with plasma bubble in glow discharge magnetized plasma显示文摘Floating potential fluctuations of glow discharge magnetized plasma are found to expose mixed mode oscillations(MMOs)in the existence of plasma bubble.Plasma bubble has been formed by emerging density gradient in the form of a sheath around a cylindrical and spherical grid to a critical value of applied potential.Two Langmuir probes,LP1 and LP2,are retained in the ambient plasma to collect the plasma floating potential fluctuations at two different locations of the plasma system.The perceived instability pattern shows regular-irregular-regular MMOs under various imposed conditions.Furthermore,various nonlinear techniques such as phase space plot,recurrence plot and Hurst exponent have been executed to understand the underlying dynamical behavior of the system.Low-frequency(~200–1200 Hz)oscillations are also supposed and are inferred as ion-acoustic waves excited by ionization instability.The observed results are then validated with the theory of the instability based on a fluid hydrodynamic approach.Mariammal MEGALINGAM Bornali SARMA 2019Plasma Science and Technology2019,21,11:0
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