Ion Detectors and The Proportional Detector

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Ion Detectors and TheProportional Detector

• Ion Detector
• large gas filled capacitor

• Proportional Detector
• cylindrical shape
• higher voltage
• townsend avalanche
• freeing of electrons in a positive feedback cycle

diagram for both circuits
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Multiwire Proportional Detectors and The Drift
Detector

• Multiwire Proportional Detector
• uses many anode wires closely spaced sandwiched
  between a pair of cathode plates
• greater resolution, larger scale

• Drift Detectors
• incorporate drift time of freed ions to achieve
  greater position resolution

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