I have been under the impression that recombination is a bad thing, not a good thing. And you increase your voltage on an ion chamber until recombination is eliminated. I also understand that recombination is a bigger problem for neutron and alpha radiation because its ionization trail is much denser (and leaves a column of ions), and since the ionization happens so densely, the ions and electrons are very close together such that their electric field attraction is much greater, and so the electric field of the ion chamber must be much higher to overcome this dense column from recombining. So, I am curious what a recombination chamber is. Does it use recombination for some measurement purpose? How could recombination be a desired effect in an ion chamber? Edit: I tried researching online, but the only article I could find that looked helpful required a purchase, and it was expensive with no guarantee of answering my question.