2022 4th International Youth Conference on Radio Electronics, Electrical and Power Engineering (REEPE),
Journal Year:
2024,
Volume and Issue:
unknown, P. 1 - 5
Published: Feb. 29, 2024
The
hazardous
effect
of
lunar
dust
on
hardware
and
humans
is
one
the
most
problematic
factors
in
planning
automated
human
missions
to
Moon.
To
reduce
possibly
eliminate
this
impact,
studies
dynamics
under
laboratory
conditions
are
being
conducted.
promising
methods
for
determining
motion
parameters
particles
such
optical
based
digital
image
processing.
aim
work
develop
algorithm
simulation
stereo
images
trajectories
microparticles
simulated
soil
observed
conditions.
results
choosing
optimal
particle
trajectory
imaging
presented.
They
can
be
used
further
exclude
influence
these
larger
scale
estimate
measurement
system.
Plasma Processes and Polymers,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 4, 2025
ABSTRACT
A
gliding
arc
plasmatron
(GAP)
is
used
for
the
production
of
hydrogen
and
acetylene
via
plasma‐assisted
methane
pyrolysis.
The
working
gas
consists
argon
with
variable
admixtures
methane.
By
applying
camera
measurements
optical
emission
spectroscopy
temperatures
electron
density
inside
GAP
are
measured.
Two
temperature
regions
determined:
filamentary
plasma,
3470–5960
K,
a
diffuse
region
characterized
by
black
body
hot
carbon
containing
dust
at
2230–2770
K.
An
analysis
product
stream
shows
maximum
conversion
44%
specific
energy
input
selectivities
towards
between
25%–81%
75%–89%,
respectively.
Physical review. E,
Journal Year:
2025,
Volume and Issue:
111(1)
Published: Jan. 7, 2025
The
intrinsic
bulk
viscosity
of
the
one-component
plasma
(OCP)
is
computed
and
analyzed
using
equilibrium
molecular
dynamics
simulations
Green-Kubo
formalism.
It
found
that
exhibits
a
maximum
at
Γ≈1,
corresponding
to
condition
average
kinetic
energy
particles
equals
potential
interparticle
spacing.
weakly
coupled
strongly
limits
are
used
construct
model
captures
full
range
coupling
strengths
simulated:
Γ≈10^{-2}-10^{2}.
Simulations
also
run
Yukawa
(YOCP)
in
order
understand
impact
electron
screening.
screening
leads
smaller
due
reduction
excess
heat
capacity
system.
Bulk
shown
be
least
an
magnitude
than
shear
both
OCP
YOCP.
generalized
frequency-dependent
coefficient
analyzed.
This
exhibit
peak
near
twice
frequency
conditions,
which
associated
with
oscillatory
decay
observed
autocorrelation
function.
coefficients
have
similar
for
ω≳2ω_{p}
conditions.
Physics of Plasmas,
Journal Year:
2025,
Volume and Issue:
32(1)
Published: Jan. 1, 2025
A
numerical
study
is
carried
out
for
the
generation
of
lower
hybrid,
whistler,
and
compressional
Alfvén
(magnetosonic)
waves
by
satellites
crossing
magnetic
field
aligned
irregularities
or
striations.
Satellites
space
debris
propagating
at
an
altitude
about
300
km
with
a
velocity
7.7
km/s
perpendicular
to
generate
wake
hybrid
wavelength
∼1
m
frequencies
near
frequency
∼7.87
kHz.
In
presence
small-scale
striations
having
widths
below
0.5
m,
satellite-generated
efficiently
mode
convert
whistler
slightly
above
frequency,
which
propagate
within
cone
∼19.5°
background
field.
For
larger
1
above,
interaction
leads
modulated
pulses
as
well
magnetosonic
large
angles
field,
frequency.
The
results
are
consistent
recent
observations
during
conjunctures
between
satellites,
where
observed
ranged
from
ion
cyclotron
[Bernhardt
et
al.,
Phys.
Plasmas
30,
092106
(2023)].
Physics of Plasmas,
Journal Year:
2025,
Volume and Issue:
32(1)
Published: Jan. 1, 2025
The
emission
of
mixed
inert/reactive
gas
plasmas,
commonly
used
in
a
variety
industrial
applications
and
laboratory
settings,
is
relatively
unquantified
the
vacuum
ultraviolet
(VUV)
wavelength
range.
VUV
spectroscopy
H2:Ar/Ne/He
inductively
coupled
radio
frequency
(RF)
plasmas
was
conducted
for
pressures
range
20–80
mTorr
with
400
W
input
RF
power
H2
concentrations
0%
to
100%.
For
H2:Ar
mixtures
at
80
mTorr,
Ly-α
(121
nm)
observed
reach
maximum
27.5%
H2:
72.5%Ar,
approximately
3.3
×
greater
than
pure
hydrogen
discharge
same
pressure,
total
115–200
nm
increased
by
factor
1.5.
By
increasing
pressure
which
were
maintained,
increased,
concentration
that
occurred
decreased.
Comparisons
simple
collisional
model
indicate
significant
dependence,
consistent
observations
self-absorption
ground
state
atoms.
Experiments
across
full
revealed
admixed
gases
heavier
atomic
masses
are
more
effective
emission.
A
similar
dependence
also
observed,
indicating
phenomena
still
highly
relevant
hydrogen/inert
plasmas.
development
high
efficiency
sources
especially
useful
space
where
there
no
atmospheric
absorption
VUV.
Physics of Plasmas,
Journal Year:
2025,
Volume and Issue:
32(1)
Published: Jan. 1, 2025
This
study
presents
a
detailed
investigation
of
the
force
profiles
on
optically
trapped
microparticles
within
sheath
dual-frequency
capacitively
coupled
plasma,
utilizing
particles
as
diagnostic
probes.
By
systematically
varying
phase
angle
between
applied
frequencies
(13.56
MHz
and
27.12
MHz),
were
precisely
measured,
revealing
strong
dependence
angle.
Sheath
parameters,
including
position
edge
location
magnitude
electric
field
maximum,
determined
found
to
correlate
closely
with
angle,
similar
dc
self-bias.
Various
models,
those
derived
from
matrix
theory
Child–Langmuir
law,
utilized
estimate
particle
charge
evolution
sheath.
The
models
compared
simulation
results
evaluate
their
accuracy,
good
agreement
simulations
analytic
models.
Differences
observed
in
terms
both
distribution
absolute
values.
Averaging
charges
across
revealed
significant
Additionally,
an
independent
approach
was
used
averaged
by
calculating
mechanical
work
required
move
through
sheath,
which
does
not
rely
any
specific
assumptions
about
field.
consideration
provided
benchmark
for
evaluating
different
offered
insights
into
relative
accuracy.
Acta Physica Sinica,
Journal Year:
2025,
Volume and Issue:
74(7), P. 1 - 1
Published: Jan. 1, 2025
Utilizing
the
principle
of
Feynman
ratchet,
it
is
possible
to
rectify
random
motion
into
directed
flow
particles
under
a
nonequilibrium
environment.
In
this
paper,
an
experimental
setup
for
dusty
plasma
metal
straight
ratchet
designed
create
asymmetric
environment
along
channel,
enabling
controllable
rectification
micron-sized
dust
particles.
Monodispersed
can
form
directional
in
and
transport
direction
could
be
precisely
controlled
by
adjusting
discharge
power
gas
pressure.
Research
on
varying
sizes
proves
that
effect
universal.
To
reveal
mechanism
particles,
fluid
model
employed
calculate
two-dimensional
distribution
parameters
within
channel.
Further
research
through
Langevin
simulation
shows
experience
potentials
with
distinct
orientations
at
different
suspension
heights
leading
directions.
The
results
paper
provide
theoretical
foundation
further
achieving
separation
bi-disperse
ratchets.
Physical Review Research,
Journal Year:
2025,
Volume and Issue:
7(1)
Published: Feb. 21, 2025
Langevin
dynamical
simulations
are
performed
to
investigate
the
formation
of
clusters
and
voids
a
two-dimensional
periodic
substrate
(2DPS)-modulated
dusty
plasma
(2DDP)
driven
by
gyroscopic
force.
It
is
discovered
that,
as
frequency
force
decreases
gradually,
substrate-modulated
2DDP
undergoes
cyclic
transition
between
ordered
cluster
void
phases.
Between
observed
phases,
studied
exhibits
more
uniform
arrangement
particles.
The
attributed
symmetry
time-averaged
potential
landscape
induced
2DPS
in
reference
frame
moving
particle,
confirmed
superimposing
particle
locations
on
effective
under
various
conditions.
Published
American
Physical
Society
2025
