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61 views

Electric field of electron in alternating potential

I am considering the case of an electron placed in an alternating sinusoidal potential, of frequency 13.56 MHz (frequency typically used for RF plasma generation). Suppose I have a simple 1D set up, ...
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0answers
19 views

Question about spatial uniformity of particle density in plasmas (from Bellan)

Early in Bellan he asks us to consider a finite-temperature plasma and assume that the ion and electron densities are initially equal and spatially uniform. He approaches the problem of calculating ...
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0answers
42 views

What Debye length should be used in plasma?

In short Which expression should be used: (1) or (2)? At length Definition of the Debye length $r_D$ is following: $$r_D=\left( \sum_{j}\frac{4\pi q_j^2 n_j}{kT_j} \right)^{-\frac{1}{2}}$$ It is ...
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0answers
50 views

Debye screening in $\mathbb{R^d}$

Consider the Poisson-Boltzmann equation $$ \nabla^2 V(r) = -\frac{1}{\epsilon_0}en\left(1 - e^{e V(r)/k_BT}\right) $$ which models the electrostatic potential in a spherically symmetric ideal gas of ...
3
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1answer
53 views

How do bulk regions of clouds conduct charges into a lightning bolt?

It's easy to find explanations of the theories of charge accumulation in clouds during storms, as well as ones describing suspected processes leading to lightning channel formation. What I have yet to ...
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1answer
108 views

Fire behaviour in microgravity

The NASA has conducted an experiment in space (Flame Extinguishment Experiment (FLEX)) where they'd initiate a combustion in microgravity in order to test the effectiveness of different fire ...
1
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0answers
23 views

How are cages in fusers protected against ion damage?

I have a simple question. Nuclear fusers (like the Farnsworth Hirsh design) use charged cages to accelerate deuterium ions to high enough energies to fuse and produce neutrons and energy. While these ...
1
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1answer
21 views

Localized electrostatic-acoustic disturbance

From this youtube comment it describes a 'localized electrostatic-acoustic disturbance' as a 'very rapid, sudden static charging of the atmosphere'. I've done some lite searching but haven't found ...
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2answers
396 views

Temperature and energy of ions and electrons at Ionization

For Xenon atom, as the ionization energy is 12.13 eV , does it mean that if 12.13 V is applied, the Xenon atom can be ionized. Also, Could you share, how to find the temperature and energy ...
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1answer
355 views

breakdown voltage in vacuum

I was trying to use the paschen's law to calculate the breakdown voltage for our vacuum chamber. Our pressure is 10^-8 torr, and distance was 3mm. However, I cannot do it because Paschen only worked ...
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0answers
171 views

Energy and Method used for Plasma separation in Ion thrusters?

When I was thinking about Ion thrusters and their energy consumption, This popped into my mind. If the gas is being ionized in the chamber, there exist both positive and negative charges at the same ...
3
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1answer
772 views

How do flames neutralize a static charge?

I was working with a demonstration galvanometer recently when it accidentally picked up a static charge from me lightly rubbing my hand across it. The case was made of a clear plastic. My attempts ...
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1answer
302 views

Real life physics problem: Why is my desktop computer affected by my plasma ball?

Note: this is strictly a physics question, not meant to be an advertisement I was running my desktop with a plasma ball on the side. The desktop has a touch screen enabled. I started to notice that ...
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0answers
525 views

Electrostatic ion thruster neutralizers

All electrostatic Ion thrusters have a neutralizer electron beam, but why are they required? Is avoiding the accumulation of negative charge the only reason? I would've thought that the main reason ...
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1answer
894 views

Effect of electric field of plasma sheaths

How will an electric fields affect the formation of plasma sheaths?
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1answer
82 views

Are the ions in a fluorescent lamps concentrated near the electrodes?

Are the ions in a fluorescent lamps concentrated near the electrodes , and just the electrons move to the other electrode or the positive mercury ions move too?