Ionization chamber and GM tube

[karen0215]

Homework Statement

What are the difference between ionization chamber and GM tube in structure which make them have different functions?

The Attempt at a Solution

Higher voltage is applied to GM tube so that electron avalanche can occur.
Then I wonder that
if higher voltage is applied to ionization chamber, it can function as a GM tube.

 

[ehild]

In principle, you are right, but read this:

http://en.wikipedia.org/wiki/Ionization_chamber.

ehild

 

[karen0215]

The difference is...
ionization chamber is connected to galvanometer and operate at normal gas pressure
while GM tube is connected to a counter and operate at low pressure

Is it?