Discovering the Energy of Accelerated Electron Beams by Jonty

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The energy of accelerated electron beams is calculated using the formula E = e * V, where E is energy, e is the charge of the electron, and V is the potential difference between the cathode and anode. An electron gun typically consists of a heated cathode that emits electrons through thermionic emission and an anode that accelerates them. The circuits for creating an electron beam can be relatively simple, but controlling the beam for practical applications, such as in cathode ray tubes, requires more complex setups. Understanding the basic principles of electron gun operation is essential for effectively generating and utilizing electron beams. This foundational knowledge is crucial for preparing for tests on the topic.
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Hey guys

Apparently I have to know how to find the energy of accelerated electron beams for a test, and I'm not sure how. Any help?

I'm assuming it's talking about electron guns: I think this consists of a heated cathode which emits electrons via thermionic emission, and an anode which accelerates them. But how do you actually get the cathode and anode (i.e. what are the circuits and how does one make each electrode charged). Is the electron beam energy just the voltage between the cathode and anode multiplied by Q (=It)?

Thanks, Jonty
 
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The energy is e*V as you suspected, charge of electron times potential difference. The circuits to create a beam for an electron gun can be quite simple. Controlling the beam to do something useful as in a cathode raty tube is a bit more involved.

http://www.matter.org.uk/tem/electron_gun/electron_gun_simulation.htm
 
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