Detecting Cations: Understanding the Role of Ion Discharge in Penning Gauges

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The discussion centers on understanding how cations interact with cathodes in penning gauges, particularly regarding the detection of cation strikes. It highlights that the collector current is influenced by the number of cations hitting the cathode, suggesting a measurable change in current upon impact. Participants are curious about the specific mechanisms behind this current change and the behavior of electrons in the cathode during cation strikes. The term 'ion discharge' is also mentioned, prompting inquiries about its definition and implications in the context of penning gauges. Overall, the conversation seeks to clarify the relationship between cation interactions and current variations in these devices.
terryphi
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Hello,

So, I'm reading up on penning gauges, and wikipedia (reliable source I know :P) says that the collector current depends on the number of cations which strike it.

So, the question I have is, how can you detect when a cation strikes a cathode? is there some sort of change in current? Why? I have some ideas, but I would really like to know your guys thoughts on this.

Edit: In the patent they talk about an 'ion discharge'. Does anyone have any insight as to what that is?
:S
 
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terryphi said:
So, the question I have is, how can you detect when a cation strikes a cathode? is there some sort of change in current? Why?
What happens to the electrons in the cathode when a cation strikes?
 

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