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IONIZATION CHAMBER, was ...

In the "stainless conductivities" thread Michael Edmiston wrote:


... I have done a lot of instrument design and construction involving
the need for electrical conduction/insulation as well as thermal
conduction/insulation. For example, I have built nuclear detectors
using liquid argon as the ionization-chamber medium. Even though
I would have liked to have used stainless steel electrical connections
(because of its low thermal conductivity) I never considered doing
so because of its low electrical conductivity. ....

Why would several ohms (or tens of ohms) would be objectionable in
the case of an ionization chamber? To my understanding, the current
depends predominantly on what happens in the ionized medium, at
least in a common air chamber. Is this not also true for a liquid?

Ludwik Kowalski