| Definition: | ionization chamber containing flat electrodes and an intervening additional electrode, called the Frisch grid, which is held at an intermediate potential, to reduce the influence of ions and to increase the efficiency
Note 1 to entry: A grid ionization chamber is a pulse ionization chamber mainly used to measure the energy of alpha particles or fission fragments. Note 2 to entry: This entry was numbered 394-25-07 in IEC 60050-394:2007.
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