Forest IonizationChambers
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An ionization chamber is essentially a gas filled volume which has one or more wires suspended inside with a voltage bias used to collect any ions or liberated electrons within the volume.
There are 4 basic operating regions which are determined by the amount of the voltage across the wire(s).
- recombination
- ionization
- proportional (plataue)
- Geiger-Muller
Recombination
Until the voltage reaches a high enough value (threshold), the liberated electrons produces will recombine with the gas before reaching the wire.
Ionization
Once the voltage is increased beyond the above threshold, the ions/ electrons make it to the cathode/anode and produce an electronic pulse on the wire (cathode).
quick definitions
- Anode
- Current IN, positively charged electrode
- Cathode
- Current OUT, negatively charged electrode
The flow of electrons is from the cathode to the anode. Current is defined as the opposite direction to the electron flow.
