In dose survey work Geiger counters are often just used to locate sources of radiation, and an ion chamber instrument is then used to obtain a more accurate measurement owing to their better accuracy and capability of counting higher dose rates.
22.
As the exciting fields pass through the plasma, the plasma electrons experience a massive attractive force back to the center of the wake by the positive plasma ions chamber, bubble or column that have remained positioned there, as they were originally in the unexcited plasma.
23.
The CD V ion chamber units are now all approaching 50 years old at a minimum and that they contain parts that are sensitive to moisture, so relatively frequent calibration and inspection by an accredited and properly equipped facility is required to ensure reliable and accurate function.
24.
Referring to the accompanying ion pair collection graph, it can be seen that in the " ion chamber " operating region the collection of ion pairs is effectively constant over a range of applied voltage, as due to its relatively low electric field strength the ion chamber does not have any " multiplication effect ".
25.
Referring to the accompanying ion pair collection graph, it can be seen that in the " ion chamber " operating region the collection of ion pairs is effectively constant over a range of applied voltage, as due to its relatively low electric field strength the ion chamber does not have any " multiplication effect ".
26.
The scientific instruments consisted of an ion chamber and Geiger-M�ller tube to measure total radiation flux, a proportional radiation counter telescope to measure high energy radiation, a scintillation counter to monitor low-energy radiation, a VLF receiver for natural radio waves, a transponder to study electron density, and part of the flux-gate and search coil magnetometers mounted on the instrument platform.
