All Questions
10
questions
0
votes
1
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75
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How can an experimental physicist create a free electron gas in air? [closed]
Suppose an experimental physicist has to create a free electron gas in a test chamber filled with air or any gas. They can do this with arcing, photoelectric effect, or others. What would be the best ...
- 1,896
-1
votes
2
answers
134
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Is the spin magnetic dipole moment of the free electron not at rest the same as its rest value?
As far as I know all experiments measure the rest value of the spin magnetic dipole moment of a free electron indirectly (i.e. apparently there is yet no method or apparatus to directly measure this ...
- 4,170
2
votes
0
answers
66
views
How exactly does J. J. Thompson's cathode ray experiment show that electrons are particles?
I've have heard in many places that J. J. Thompson used a magnet and capacitor plates to look at the effects of the electric and magnetic fields on the cathode ray. This way, he was able to deduce the ...
- 8,660
5
votes
1
answer
107
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Experimental evidence for the shape of a single electron's EM field?
I've read about how people have literally measured the gyromagnetic ratio of a single electron in a Penning trap. Naturally, I am frankly blown away by the exquisite precision of such an experiment.
...
- 2,475
3
votes
2
answers
132
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How, exactly, does an electron scatter off of a neutron?
I thought about this recently because of news articles discussing the measurements of the 'neutron skin' of large nuclei....
Is it due to the fact that both have a negative magnetic moment?
Or to ...
- 4,509
4
votes
4
answers
3k
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What causes the spirals to be inward in the bubble chamber images?
My understanding is that the circular paths are caused by the action of the Lorentz force on the electrons and positrons.
However, I'm not sure why the circular paths are going inward. I have two ...
- 8,660
0
votes
1
answer
355
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Thermonic Electron Gun
On the first figure, you can see schematic diagram of typical thermionic electron gun from Wiki.with filament voltage(1-2) electrons are emitted and with bias(1-3) - focused.
Source
and here is ...
- 198
1
vote
2
answers
437
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Open Source Particle Tracing Software
I am fairly new to this forum. I am designing an ionospheric plasma testing environment in a thermal vacuum chamber and to do so I require some form of multi-physics package for simulations .. such as ...
4
votes
1
answer
845
views
Thermal emission cathode electron velocity distribution
I can't find any experimental data (or theoretical expression) on what is the velocity (or energy) distribution of thermal emission cathode electrons emmited from the cathode at approximately 2000 K (...
- 143
3
votes
1
answer
379
views
PNMR, Pulsed Nuclear Magnetic Resonance, Experiment
I am writing a lab report for class on PNMR experiment that we did. How come in this experiment we don't worry about the electron spins in our sample? Aren't the electrons affected by the PNMR machine ...
- 3,871