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David lopez
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how high does a vacuum need to be for electron gun to work? for example, will 1 pascal work, will 1 tenth of a pascal work? is there a minimum vacuum for a electron gun to work?
what reading have you done to try and find an answer ?David lopez said:how high does a vacuum need to be for electron gun to work? for example, will 1 pascal work, will 1 tenth of a pascal work? is there a minimum vacuum for a electron gun to work?
David lopez said:how high does a vacuum need to be for electron gun to work? for example, will 1 pascal work, will 1 tenth of a pascal work? is there a minimum vacuum for a electron gun to work?
What is your accelerating voltage?David lopez said:as long as it generates an electron beam that is 3 centimeters long or longer, it works.
David lopez said:as long as it generates an electron beam that is 3 centimeters long or longer, it works.
But you still did not say what you tend to investigate.David lopez said:make an electron gun for a science fair. i am thinking thermionic emission.
An electron gun is a device that uses an electric field to accelerate electrons and emit them in a focused beam. In a vacuum, there are no air molecules to interfere with the movement of the electrons, allowing them to travel in a straight line without any resistance.
The vacuum in an electron gun serves two main purposes. First, it prevents the electrons from colliding with air molecules, which would scatter the beam and reduce its accuracy. Second, it allows for a higher voltage to be applied to the gun, which results in a more powerful and focused beam.
The vacuum needed for an electron gun depends on the specific design and purpose of the gun. Generally, a vacuum of at least 10^-6 torr is required for most electron guns to operate effectively. However, some specialized guns may require even higher vacuums, up to 10^-10 torr.
If the vacuum in an electron gun is not strong enough, the beam of electrons will be scattered and lose its focus. This can result in a less accurate and weaker beam, reducing the efficiency and effectiveness of the gun.
The vacuum in an electron gun is maintained through a combination of pumps and valves. The pumps remove air molecules from the gun, while the valves control the flow of gas in and out of the gun. Additionally, the gun may have a vacuum gauge to monitor and adjust the vacuum level as needed.