A version of the above dosimeter without the self-reading capabilities, called a pocket ionization chamber or just pocket chamber, was widely used in World War II and postwar government and military projects, particularly the Manhattan project. This consisted of a simple ionization chamber with an electrode running down the center, but no electroscope for reading. Instead the exposure was read by plugging the device into a separate precision electrometer/charger, which measured the decline in charge on the electrode and displayed it on a meter, before recharging the electrode. These had the advantage that they were simpler, more rugged, and cheaper than the electrometer type, but the disadvantage (considered desirable in some military applications) that the exposure couldn't be read by the wearer without the electrometer/charger. They are no longer used.
Read more about this topic: Quartz Fiber Dosimeter
Famous quotes containing the words pocket and/or chamber:
“The stabbing horror of life is not contained in calamities and disasters, because these things wake one up and one gets very familiar and intimate with them and finally they become tame again.... No, it is more like being in a hotel room in Hoboken let us say, and just enough money in one’s pocket for another meal.”
—Henry Miller (1891–1980)
“Another day. Deliberations are recessed
In an iron-blue chamber of that afternoon
On which we wore things and looked well at
A slab of business rising behind the stars.”
—John Ashbery (b. 1927)