Gas Chromatography Detectors - Ionization Detectors > The Simple or Macro Argon Detector Sensor > Page 54

 

However, there are some complications to this apparently simple sensing system; when an ion is produced by collision between a metastable atom and an organic molecule, the electron, simultaneously produced, is immediately accelerated toward the anode. This results in a further increaseinmetastableatoms and a consequent increase in the ionization of the organic molecules. The resulting cascade effect, unless controlled, results in an exponential increase in ion current. The control of this cascade production of ions involves a negative feed back control on the ion production

The Simple or Macro Argon Detector Sensor

 

 

Figure 28 The Macro Argon Detector