International Journal for Multidimensional Research Perspectives
ISSN: 2584 -0029 (Online)
© IJMRP \ Vol. 2\ Issue 4 \ 2024
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International Journal for Multidimensional Research Perspectives (IJMRP) (46)
Study of Electron Energy Distribution Function, Transport Parameters and
Instability Analysis of Argon Plasma confined by a Dipole Magnet
Justin Reji
1
Dr. Anuj Ram Baitha
2
Teacher
1
Assistant Professor
2
Physics department, Jupiter Higher Secondary School, Una, Gujarat, India
1
Department of Physics, School of Advanced Sciences, Vellore Institute of Technology, Vellore, Tamilnadu, India
2
Abstract:
This theoretical study is to investigate production and properties of plasma confined by a dipole magnet. A
cylindrical permanent magnet (N40 grade) having a surface magnetic field of nearly 1Tesla is simulated to
create a dipole magnetic field. Plasma is created by electron cyclotron resonance heating. Heating is
accomplished using microwaves operating in continuous mode at 2.45 GHz and electron cyclotron resonance.
The investigation is performed in systems of cylindrical geometries at varying pressures (0.5 mTorr – 1.5
mTorr). The electron temperature lies in the range of 1 - 5 eV, is hotter near the magnets and follows a
downstream fashion throughout the region. It is found that plasma electron density reaches a peak value of
5.5 × 10
15
−3
at a radial distance of 4cm from the magnet. Electron Energy Distribution Function (EEDF)
growth investigation throughout the region was done to understand the role of magnetic field confinement. The
EEDF was calculated numerically from steady state Boltzmann equation, considering plasma follows
druyvesteyn distribution. Followed by analysing transport parameters such as diffusion coefficient, drift
velocity, mobility, and recombination rates in plasma. A comparative study for all plots gave been done with
respect to pressure. The instability analysis of elastic collisional frequency with inelastic collisions, real
frequency and growth factor with wave vector has been also listed in the study.
Keywords: Microwave plasma, Dipole plasma, Electron energy distribution, Particle balance, Ionization rate,
Diffusion and recombination rates, Plasma instability.
Introduction:
Dipole fields represent a fundamental magnetic
configuration observed throughout the Universe,
shaping the behaviour of charged particles within
plasma environments. The Earth's magnetosphere
serves as a prominent example of a naturally
occurring system influenced by dipolar magnetic
fields, showcasing a diverse array of phenomena.
Plasmas confined within dipole magnetic fields
exhibit distinctive properties governing their
confinement, transport, instability, and fluctuations,
impacting both laboratory and space plasma
dynamics. Particle balance within these plasmas,
crucial for understanding steady-state behaviour,
involves a delicate equilibrium between generation
and loss mechanisms. While ionization predominantly
drives particle generation, loss processes encompass
diffusion, recombination, and interactions with the