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 ?
Limited Tenders are invited for Quotation For Ionization Chamber Survey Meter, Iari
Medical Radiation Detection, Monitoring & Safety Market - [Dosimeter, Lead Apron, Geiger Counter, Ionization Chamber, Scintillator, Semiconductor Detector, Terahertz Detector, Lead Eyewear & Glove]- Competitive Analysis & Global Forecasts to 2017 http://www.
radon rotating in the air trap in the ionization chamber during passing through the machine.
The NIST pressurized ionization chamber "A" has been used since the 1960s to maintain activity standards via calibration factors (K-values, vide infra) [83].
They are moderately bulky, and like the pocket ionization chamber dosimeters are fairly expensive and require calibration and training for use.
A sampling of topics: a brief history of dosimetry, calibration protocols, and the need for accuracy; cavity theory, stopping-power ratios, and correction factors; ionization chamber instrumentation; review of TG-51 protocol; kilovoltage x-ray dosimetry; clinical electron beam dosimetry, thermoluminescent detector and Monte Carlo techniques for reference-quality brachytherapy dosimetry; dosimetry for small photo beams used for stereotactic radiosurgery/radiotherapy; hadron dosimetry; radiochronic film; diamond detector; gel dosimetry; Fricke and alanine dosimeters; and stopping-power ratios, rations of mass-energy coefficients, and CSDA ranges of electrons.
The x-ray backscatter sensor, which will be shown for the first time at NPE in Chicago next month, uses an ionization chamber to detect reflected x-rays.
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.
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.