ionization chamber


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Related to ionization chamber: proportional counter, scintillation counter

chamber

 [chām´ber]
an enclosed space.
Chambers of the eye. From Dorland's, 2000.
anterior chamber the part of the aqueous humor-containing space of the eyeball between the cornea and iris.
counting chamber the part of a hemacytometer consisting of a microscopic slide with a depression whose base is marked in grids, and into which a measured volume of a sample of blood or bacterial culture is placed and covered with a cover glass. The number of cells and formed blood elements in the squares is counted under a microscope and used as a representative sample for calculating the unit volume.
drip chamber the expanded portion of intravenous tubing into which fluid falls, where the rate of flow can be monitored if necessary. See also intravenous infusion.
hyperbaric chamber an enclosed space in which gas (oxygen) can be raised to greater than atmospheric pressure; see also hyperbaric oxygenation.
ionization chamber an enclosure containing two or more electrodes between which an electric current may be passed when the enclosed gas is ionized by radiation; used for determining the intensity of x-rays and other rays.
posterior chamber that part of the aqueous humor–containing space of the eyeball between the iris and the lens.
vitreous chamber the vitreous humor–containing space in the eyeball, bounded anteriorly by the lens and ciliary body and posteriorly by the posterior wall of the eyeball.

i·on·i·za·tion cham·ber

a chamber for detecting ionization of the enclosed gas; used for determining intensity of ionizing radiation.
See also: Geiger-Müller counter.

ion·i·za·tion cham·ber

(ī'on-ī-zā'shŭn chām'bĕr)
A chamber for detecting ionization of the enclosed gas; used for determining intensity of ionizing radiation.

ion·i·za·tion cham·ber

(ī'on-ī-zā'shŭn chām'bĕr)
A chamber for detecting ionization of the enclosed gas.
References in periodicals archive ?
Geography precluded direct measurement of the ampoule in this experiment on a previously NIST-calibrated ionization chamber, and so the link between experiments was based on Capintec's claim of < 2% chamber-to-chamber variability.
The calibration data were recorded by the Ritz ionization chamber [12] positioned at the height of the fixed calibration source, as the stand off-distance is varied.
The CTDI/MSAD method suggested by the CDRH uses a pencil ionization chamber shown in Fig.
The free-air ionization chamber that has been dedicated for the measurement of air-kerma for electronic brachytherapy is the Lamperti FAC [7].
The SIR equivalent activities, [A.sub.e], are essentially calibration factors for the SIR ionization chamber (3), based on submissions from participating laboratories.
A NIST reference-class transfer ionization chamber was calibrated by each laboratory in terms of the quantity air kerma in four ISO narrow x-ray spectra beams with energies between 80 kV and 150 kV and in a [.sup.137]Cs gamma-ray beam.
For a free-air ionization chamber standard with measuring volume V, the air-kerma rate, K, is determined by the equation
Our detector design builds on the success of a segmented helium-3 ionization chamber and a neutron MicroMegas detector.
Figure 6 shows the measured neutron time of flight distribution using the [.sup.3]He ionization chamber mounted at the end of the flight path 12 neutron guide.
The segmented [.sup.3]He ionization chamber measures left and right side count rates independently, so by comparing the count rates from both sides, reactor power fluctuations can be eliminated from the signal.