Investigation of non linear dynamics of an excitable magnetron sputtering plasma
In this paper nonlinear dynamical behaviour of an excitable DC magnetron sputtering plasma has been investigated. Initially, plasma exhibited fixed point dynamics whereas with the increase in the discharge voltage, spikes were observed in the floating potential fluctuations. Furthermore, the increas...
Main Authors: | , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Elsevier
2019-03-01
|
Series: | Results in Physics |
Online Access: | http://www.sciencedirect.com/science/article/pii/S2211379718335216 |
id |
doaj-4400e2d3e91c45409af2b35fa38f8b51 |
---|---|
record_format |
Article |
spelling |
doaj-4400e2d3e91c45409af2b35fa38f8b512020-11-25T02:15:03ZengElsevierResults in Physics2211-37972019-03-011218141820Investigation of non linear dynamics of an excitable magnetron sputtering plasmaGopikishan Sabavath0Pankaj Kumar Shaw1A.N. Sekar Iyengar2I. Banerjee3S.K. Mahapatra4Centre of Plasma Physics – Institute for Plasma Research (CPP-IPR), Sonapur, Assam 782402, IndiaThe Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Midreshet Ben-Gurion, IsraelPlasma Physics Division, Saha Institute of Nuclear Physics, 1/AF, Bidhannagar, Kolkata 700064, IndiaSchool of Nano Sciences, Central University of Gujarat, Gandhinagar 382030, IndiaCentre for Physical Sciences, Central University of Punjab, Bathinda 151001, India; Corresponding author.In this paper nonlinear dynamical behaviour of an excitable DC magnetron sputtering plasma has been investigated. Initially, plasma exhibited fixed point dynamics whereas with the increase in the discharge voltage, spikes were observed in the floating potential fluctuations. Furthermore, the increasing of discharge voltage resulted the increase in spikes. Power spectrum plot, normalized variance, recurrence plot and Hurst exponent are employed to extract the underlying feature of the floating potential fluctuations. A dip in the plot of normalized variance with variation in the control parameter has been seen, which is strongly indicative of coherence resonance like behaviour in the system. Power spectrum plot and Hurst exponent estimation are confirming the presence of coherence resonance behaviour. Apart from quantitative confirmation, visual verification of coherence resonance behavior has been carried out using recurrence plot analysis. It is noticed that the noise component increases with the increase in the discharge voltage and a suitable intrinsic noise strength plays an important role in generating the coherence resonance. Keywords: Intrinsic coherence resonance, Floating potential fluctuation, DC magnetron plasma, Hurst exponent, Noise componenthttp://www.sciencedirect.com/science/article/pii/S2211379718335216 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Gopikishan Sabavath Pankaj Kumar Shaw A.N. Sekar Iyengar I. Banerjee S.K. Mahapatra |
spellingShingle |
Gopikishan Sabavath Pankaj Kumar Shaw A.N. Sekar Iyengar I. Banerjee S.K. Mahapatra Investigation of non linear dynamics of an excitable magnetron sputtering plasma Results in Physics |
author_facet |
Gopikishan Sabavath Pankaj Kumar Shaw A.N. Sekar Iyengar I. Banerjee S.K. Mahapatra |
author_sort |
Gopikishan Sabavath |
title |
Investigation of non linear dynamics of an excitable magnetron sputtering plasma |
title_short |
Investigation of non linear dynamics of an excitable magnetron sputtering plasma |
title_full |
Investigation of non linear dynamics of an excitable magnetron sputtering plasma |
title_fullStr |
Investigation of non linear dynamics of an excitable magnetron sputtering plasma |
title_full_unstemmed |
Investigation of non linear dynamics of an excitable magnetron sputtering plasma |
title_sort |
investigation of non linear dynamics of an excitable magnetron sputtering plasma |
publisher |
Elsevier |
series |
Results in Physics |
issn |
2211-3797 |
publishDate |
2019-03-01 |
description |
In this paper nonlinear dynamical behaviour of an excitable DC magnetron sputtering plasma has been investigated. Initially, plasma exhibited fixed point dynamics whereas with the increase in the discharge voltage, spikes were observed in the floating potential fluctuations. Furthermore, the increasing of discharge voltage resulted the increase in spikes. Power spectrum plot, normalized variance, recurrence plot and Hurst exponent are employed to extract the underlying feature of the floating potential fluctuations. A dip in the plot of normalized variance with variation in the control parameter has been seen, which is strongly indicative of coherence resonance like behaviour in the system. Power spectrum plot and Hurst exponent estimation are confirming the presence of coherence resonance behaviour. Apart from quantitative confirmation, visual verification of coherence resonance behavior has been carried out using recurrence plot analysis. It is noticed that the noise component increases with the increase in the discharge voltage and a suitable intrinsic noise strength plays an important role in generating the coherence resonance. Keywords: Intrinsic coherence resonance, Floating potential fluctuation, DC magnetron plasma, Hurst exponent, Noise component |
url |
http://www.sciencedirect.com/science/article/pii/S2211379718335216 |
work_keys_str_mv |
AT gopikishansabavath investigationofnonlineardynamicsofanexcitablemagnetronsputteringplasma AT pankajkumarshaw investigationofnonlineardynamicsofanexcitablemagnetronsputteringplasma AT ansekariyengar investigationofnonlineardynamicsofanexcitablemagnetronsputteringplasma AT ibanerjee investigationofnonlineardynamicsofanexcitablemagnetronsputteringplasma AT skmahapatra investigationofnonlineardynamicsofanexcitablemagnetronsputteringplasma |
_version_ |
1724898185096200192 |