Considering a plasma is created inside a capillary tube, I would like to inquire about the simplest way to measure the gas pressure inside that capillary tube.
clarification:
In pulsed discharge inside a capillary tube (radius of about 2-3 mm), the wall ablation causes a dramatically increase in the pressure. This is what is usually called "electrothermal discharge". What is the simplest and cheapest method to measure the pressure experimentally?
I think you could apply an equivalent barotropic form of the Jurine law of capillary action
clarification:
In pulsed discharge inside a capillary tube (radius of about 2-3 mm), the wall ablation causes a dramatically increase in the pressure. This is what is usually called "electrothermal discharge". What is the simplest and cheapest method to measure the pressure experimentally?
If the LTE assumption is reasonable, you can consider using OES. if you can get the electron temperture and electron density from OES data, pressure can be obtained by the inverse calculation.
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