2015-08-05
Instability of Ion Beam Driven Electrostatic Ion-Cyclotron Waves in Collisional Magnetized Two-Ion Component Plasma
By
Progress In Electromagnetics Research Letters, Vol. 54, 123-128, 2015
Abstract
We have studied the instability of electrostatic ion-cyclotron waves in collisional magnetized two-ion component plasma (light positive K+ ions and heavy positive Cs+ ions). An ion beam propagating through collisional magnetized plasma containing electrons and two positive ion components drives electrostatic ion cyclotron (EIC) waves to instability via Cerenkov interaction. Analytical expressions & numerical calculations have been carried out for the frequency and growth rate of ion cyclotron waves for two EIC wave modes for existing experimental parameters, and it is found that the unstable mode frequency does not depend on electron collision frequency, while the growth rate is increased linearly with the electron collision frequency. Moreover, as the light ion concentration is increased, the frequency of the heavy ion mode moves closer to its gyrofrequency. Similarly, the frequency of the light ion mode approaches the light ion cyclotron frequency as the heavy ion concentration is increased. It is also found that the normalized unstable mode frequencies remains unchanged with electron collision frequencies, while the growth rate is increased linearly with the electron collision frequencies. In addition, the unstable mode frequencies are found to be dependent on the magnetic field strengths.
Citation
Jyotsna Sharma, Suresh C. Sharma, and Daljeet Kaur, "Instability of Ion Beam Driven Electrostatic Ion-Cyclotron Waves in Collisional Magnetized Two-Ion Component Plasma," Progress In Electromagnetics Research Letters, Vol. 54, 123-128, 2015.
doi:10.2528/PIERL15042703
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