ionization chamber


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Related to ionization chamber: proportional counter, scintillation counter

ionization chamber

n.
A gas-filled enclosure containing positive and negative electrodes that measures the amount of radiation passing through it by measuring the electric charge generated when the ions created by the radiation migrate to the electrodes.

ionization chamber

n
(General Physics) a device for detecting and measuring ionizing radiation, consisting of a tube containing a low pressure gas and two electrodes between which a high voltage is maintained. The current between the electrodes is a function of the intensity of the radiation

ioniza′tion cham`ber


n.
an apparatus for detecting and analyzing ionizing radiation by measuring current between electrodes in a vessel filled with a gas at normal or lower than normal pressure.
[1900–05]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.ionization chamber - a measuring instrument that measures the amount of ionizing radiation
boron chamber - an ionization chamber lined with boron or filled with boron trifluoride gas for counting low velocity neutrons
Geiger tube, Geiger-Muller tube - an ionization chamber contained in a tube in a Geiger counter
measuring device, measuring instrument, measuring system - instrument that shows the extent or amount or quantity or degree of something
References in periodicals archive ?
Blueair attributes its high CADR rating to improvements made in the Model 501's ionization chamber and in the polypropylene filters, Improvements include increasing the number of ionization brushes in the air filter chamber from 4 to 10.
The radicals, together with other reaction products, are permitted to enter the ionization chamber of a mass spectrometer and are subjected to electron bombardment.
Samples were redissolved in acetonitrile-water-formic acid (50:50:0.025 by volume) and introduced into the ionization chamber. Acylcarnitines were measured in multiple-reaction monitoring (MRM) mode with the ion pairs 347.4/85.0 Da and 360.4/85.0 Da for L-[[sup.2][H.sub.3]]octanoylcarnitine and malonylcarnitine, respectively.
Bengt Rittri, Blueair's president, noted "a trend with ionizing in general." His high-end units, said to earn the highest CADR rating, differ by using an ionization chamber to keep the oxygen molecules inside.
The instrument uses an ionization chamber to measure the exposure incident on the sensor; the voltage in the ionization chamber is measured by the circuitry, and the appropriate measurement is displayed on a digital readout.
* Ionization Chamber detectors use a radioactive source to produce electrically charged molecules (ions) in the air.
Furthermore, engineers are developing an improved detector component for the system and a smaller footprint for the ionization chamber. These upgrades are being made in preparation for a design freeze of the prototype and multi device creation for additional testing.
The NIST pressurized ionization chamber "A" has been used since the 1960s to maintain activity standards via calibration factors (K-values, vide infra) [83].
- Radiation Detection, Monitoring & Safety Market (Geiger Counter, Ionization Chamber, Scintillator, Terahertz detector, Dosimeter, Environment Monitor, Shield, Lead Apron, Eyewear & Glove) - Competitive Analysis & Global Forecasts to 2017
With a closed ion source, the ionization chamber is somewhat separate from both the mass filter and the electron-producing filament.
ionization chamber lnd type 520121 or analogues requirements for consumer, technical and economic indicators (characteristics) - in competitive documents (in attachment) 5 pieces, 9 700 byn2.
Since the incident air kerma to be measured is generally only slightly higher than background levels, the standards and guidance documents in Table 1 generally recommend, for sensitivity, using a largevolume, free-air (thin-walled) ionization chamber (IC) with a high-quality electrometer with 0.1 pC resolution for the charge collection.