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Detecting Cations

  1. Mar 19, 2013 #1

    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?
    Last edited: Mar 19, 2013
  2. jcsd
  3. Mar 21, 2013 #2


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    Staff: Mentor

    What happens to the electrons in the cathode when a cation strikes?
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