Thermodynamics in an ion beam?

In summary, Harper is trying to design an ion beam source and is having some trouble with the thermodynamics of it. He is looking for an equation that will tell him the amount of energy he needs to put into a set mass of a set material in order to turn it all into a gas at a set pressure and temperature. He is trying to do this without taking a full course in thermodynamics, but if he must he will.
  • #1
Harperchisari
10
2
Hi there,
I'm trying to design an ion beam source, but having some issues with the thermodynamics of it. I'm no expert in thermodynamics, but I do understand some. I'm trying to find an equation which I can use to find the amount of energy I need to put into a set mass of a set material in order to turn it all into a gas at a set pressure at a set initial temperature. This equation would have constants that change depending on the material of course.

I'm trying to figure out the energy to make an ion beam, so I assume the energy required to make the beam would be the energy to separate the mass from the main mass ( the thermodynamic part) as well as the energy required to strip the outer electron away from the mass and accelerate the mass forward. The energy should be able to be separated thermally (by heating it), electrically (by applying a potential), or, ideally, a mixture of both, but the total energy binding the particles should be the same.

In the end, it should be an equation like Etotal = Eacceleration + Eelectron stripping + Eseparation where Eseparation = Ethermal + Evoltage. In this case Eseparation should also be the same amount of energy required to turn the set amount of material directly into a gas (i.e. it could be done entirely through thermal means) which would be easier at lower pressures, but I also need to have a voltage component as well, as I am trying to accelerate it away anyways.

I'm trying to do this without taking a full course in thermodynamics, but if I must I will. I just figured I'd pose this here in case someone knows the equation mentioned (or equations) mentioned in paragraph 1.
Thanks for any response,
Harper
 
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  • #2
I can't help much with the theoretical equations but I can supply some background information that might help.

The ion sources commonly used in the semiconductor industry use electron bombardment (directly heated filaments or indirectly headed cathodes) with a externally piped in process gas (or a crucible vaporizer to generate that gas inside the source) to generate the positive ions needed for source extraction.

https://patents.google.com/patent/EP1093149B1/en
https://inis.iaea.org/collection/NCLCollectionStore/_Public/26/001/26001458.pdf
 
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1. What is thermodynamics in an ion beam?

Thermodynamics in an ion beam is the study of the behavior of ions and their interactions with other particles in a beam, in relation to temperature, energy, and entropy.

2. How does temperature affect ion beams?

Temperature affects ion beams by influencing the kinetic energy and velocity of the ions. This can impact the beam's stability, focusing, and overall performance.

3. What is entropy in relation to ion beams?

Entropy in an ion beam refers to the disorder or randomness of the ions' motion. It is a measure of the system's energy distribution and can impact the efficiency and stability of the beam.

4. What are the applications of thermodynamics in ion beams?

Thermodynamics in ion beams has various applications, including in materials science, nuclear physics, and medical treatments such as proton therapy. It is also essential in the development and optimization of ion beam technologies.

5. How is thermodynamics in ion beams studied?

Thermodynamics in ion beams is studied through various experimental techniques, such as measuring the beam's temperature, energy distribution, and entropy. Computer simulations and theoretical models are also used to analyze and predict the behavior of ion beams.

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