How are electrons accelerated in electron impact ionization?

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Discussion Overview

The discussion revolves around the mechanisms of electron acceleration in the context of electron impact ionization. Participants explore various methods and configurations used to accelerate electrons, particularly in experimental setups.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant questions the context of the inquiry, suggesting that the method of acceleration may depend on the specific device or experiment being referenced.
  • Another participant emphasizes the need for specificity in the question, indicating that there are multiple methods of electron acceleration and urging the citation of a particular experiment or source.
  • A participant mentions that electrons can be produced through thermionic emissions and acknowledges that the source does not specify how they are accelerated.
  • One proposed method for accelerating electrons involves applying a negative voltage to the filament or an electrode, creating an electric field that accelerates the electrons. The possibility of using a positive electrode in conjunction with a negative one is also mentioned.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the specific methods of electron acceleration, indicating that multiple competing views and methods remain in discussion.

Contextual Notes

Participants highlight the vagueness of the original question and the need for specific experimental contexts, which may limit the applicability of the responses provided.

Misha Kuznetsov
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Hello, I just have a quick question about electron impact ionization.

How exactly are the electrons accelerated? Are they attracted by an anode?
 
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In what context is this happening? Is this about electron impact ionization in a specific device?
 
Misha Kuznetsov said:
Hello, I just have a quick question about electron impact ionization.

How exactly are the electrons accelerated? Are they attracted by an anode?

This is extremely vague, because there are many different ways to do this. You need to cite specific type of experiment that you had in mind. If this is from something you read, cite the exact source as you would when you cite a reference in a paper.

Zz.
 
I read it on Wikipedia : http://en.wikipedia.org/wiki/Electron_ionization

It says that electrons are produced through thermionic emissions, and then are accelerated. It didn't say how they are accelerated.

If there are multiple ways, which ones are typical and common.
 
I believe a typical way of accelerating them is to apply a negative voltage to either the filament itself or an electrode on one side of the filament so that electrons are accelerated by the electric field. I'm sure it's possible to use a positive electrode instead (or in conjunction with a negative electrode) if the configuration of the device allows it.
 

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