Oscillating Electron Beam potential between metal plates

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Discussion Overview

The discussion revolves around the behavior of an oscillating electron beam between two parallel metal plates, focusing on the potential developed due to the oscillation and the feasibility of simulating this scenario. Participants explore the conditions under which oscillation occurs and the implications of induced electric fields.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant queries how to calculate the potential developed and whether it will be significant.
  • Another participant questions the expected conditions for oscillation, seeking clarification on the setup.
  • A participant mentions having derived an equation involving a time-varying magnetic field and simulated the electron's motion, suggesting it resembles undulatory motion.
  • There are repeated requests for clarification on the experimental setup, including the nature of the variable magnetic field and the charge on the metal plates.
  • Retarded potentials are suggested as a possible method to analyze the situation.
  • Participants express the need for more detailed descriptions to understand the experimental context and the charge distribution in the plates.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the specifics of the oscillation or the experimental setup, with multiple competing views and requests for clarification remaining unresolved.

Contextual Notes

Participants highlight limitations in the descriptions provided, noting that assumptions about the experimental conditions and the nature of the magnetic field are not fully articulated.

SunRay-dvsh
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Take the case where the electron-beam is oscillating between two parallel metal plates, there will be alternating potential developed between the plates as metal tries to negate all external electric fields.
My query is,
(1) How to calculate the potential developed and possible way to simulate it ?
conductor.jpg

(2) Will the potential developed be significant ?
ParallelPlates_EField_Sketch.png
 
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Where and why do you expect any oscillation?
 
mfb said:
Where and why do you expect any oscillation?

It's an equation i have derived with time varying magnetic field. At this moment before journal publication i really can't say much but i have simulated the particle trace of electron on simulation software and it gave a perfect match. The electron traverses undulatory motion(like in an undulator) but in time varying magnetic field.
Please i need help with finding the potential developed by bunches of electrons, all in same phase oscillating up and down at same frequency(also moving forward but don't require that component) between the two ends of each metal plates !
 
mfb said:
Where and why do you expect any oscillation?

Thanks For the reply btw
 
Fair enough, but your account, nor the pictures, allow anyone to construct the situation you are trying to describe. So help the helpers help you if you can :smile:
 
SunRay-dvsh said:
Please i need help with finding the potential developed by bunches of electrons, all in same phase oscillating up and down at same frequency(also moving forward but don't require that component) between the two ends of each metal plates !
Retarded potentials should help, alternatively use the simulation software.

There is an electron beam shot between the two plates at some fixed point? The variable magnetic field is some external input? How does it vary in time, and does it vary in space? Why is there a charge on the metal plates? It is impossible to figure out what your experiment is if you don't describe it.
 
mfb said:
Retarded potentials should help, alternatively use the simulation software.

There is an electron beam shot between the two plates at some fixed point? The variable magnetic field is some external input? How does it vary in time, and does it vary in space? Why is there a charge on the metal plates? It is impossible to figure out what your experiment is if you don't describe it.

One can visualize the motion of electron like that of the dielectric material(which is basically electron mass in my case) oscillating between the two parallel plates at fixed frequency:

cap-dielectric03.jpg


The kind of charge distribution in the plates will be like this due to induced electric field of the electrons:
eplat4.gif


The electrons are NOT touching the plates,
the magnetic field is varying only in time and is externally applied. Just consider the electron motion in undulator with the electrons oscillating between the metal plates(like an undulator with two side walls)
 
BvU said:
Fair enough, but your account, nor the pictures, allow anyone to construct the situation you are trying to describe. So help the helpers help you if you can :smile:

True, will try to be more expressive then :thumbup:.
 

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