Why is the central electrode in a G.M. tube positive?

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SUMMARY

The central electrode in a Geiger-Muller (G.M.) tube is always positive to ensure effective charge multiplication. If the electrode were negative, electrons would move outward into regions of lower electric field strength, preventing the necessary ionization cascade. This design is critical for the functionality of the G.M. tube in detecting radiation.

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  • Understanding of Geiger-Muller tube operation
  • Knowledge of electric field dynamics
  • Familiarity with ionization processes
  • Basic principles of radiation detection
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Charles W
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Why is the central electrode in a Geiger-Muller tube always positive (and not negative)?

Many thanks!
 
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If it would be negative, your electrons would move outwards where the field strength is too low to get charge multiplication.
 
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Thank you very much! I understand now :)
 

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