Ionization chamber

From Glossary of Meteorology

ionization chamber

An apparatus used to study the production of ions in the atmosphere by cosmic ray and radioactive bombardment of air molecules.

The chamber is an airtight container usually cylindrical in shape and 25–50 L in volume. An insulated electrode is centrally located in the chamber. In operation a potential is applied between the electrode and the chamber wall. The ions produced in the chamber are collected by the electrode and measured by an electrometer. Amplification of ions may occur as the result of gas multiplication.

Copyright 2022 American Meteorological Society (AMS). For permission to reuse any portion of this work, please contact Any use of material in this work that is determined to be “fair use” under Section 107 of the U.S. Copyright Act (17 U.S. Code § 107) or that satisfies the conditions specified in Section 108 of the U.S.Copyright Act (17 USC § 108) does not require AMS’s permission. Republication, systematic reproduction, posting in electronic form, such as on a website or in a searchable database, or other uses of this material, except as exempted by the above statement, require written permission or a license from AMS. Additional details are provided in the AMS Copyright Policy statement.