Title :
Very low frequency oscillations in ECR produced plasmas of the MaPLE device
Author :
Biswas, Subir ; Pal, Rabindranath ; Iyengar, A.N.S.
Author_Institution :
Saha Inst. of Nucl. Phys., Kolkata, India
Abstract :
Study of floating potential in the plasma produced by electron cyclotron resonance method in the MaPLE device of Saha Institute of Nuclear Physics reveals the presence of a very low frequency (300 Hz) oscillation and its harmonics. While moving outward radially from the axis of the cylindrical device the fluctuation changes from chaotic to periodic and then quasiperiodic at the edge. A radial phase shift of these oscillations is also observed. The oscillations are described using predator-prey model for neutral depletion during ionization process.
Keywords :
nonlinear dynamical systems; plasma fluctuations; plasma nonlinear processes; plasma oscillations; plasma production; plasma radiofrequency heating; plasma transport processes; predator-prey systems; ECR produced plasmas; MaPLE device; Saha Institute of Nuclear Physics; VLF oscillation harmonics; chaotic plasma fluctuation; electron cyclotron resonance method; ionization process; neutral depletion; plasma floating potential; predator-prey model; quasiperiodic plasma fluctuation; very low frequency oscillations; Chaos; Cyclotrons; Harmonic analysis; Magnetic resonance; Oscillators; Plasmas; Probes;
Conference_Titel :
General Assembly and Scientific Symposium, 2011 XXXth URSI
Conference_Location :
Istanbul
Print_ISBN :
978-1-4244-5117-3
DOI :
10.1109/URSIGASS.2011.6051082
