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`IEEE 100 2 the authoritative dictionary of IEEE standards terms.—7th ed.
`p. cm.
`r,
`ISBN 0-7381-2601~2 (paper ack : alk. paper)
`1. Electric engineering——Dictionaries. 2. E1ectronics——DictionaIies. 3. Computer
`engineering—-Dictionaries. 4. Electric engineering——Acronyms. 5. E1ectronics—+Acronyms.
`6. Computer enginee1ing-Acronym .
`.
`
`TK9 .128 2000
`
`621.3’03—-dc21
`
`00-050601
`
`
`
`
`
`
`
`

`
`ionic-heated-cathode
`
`589
`
`ionospheric mode of propagation
`
`ionization vacuum gauge A vacuum gauge that depends for its
`operation on the current of positive ions produced in the gas
`by electrons that are accelerated between a hot cathode and
`another electrode in'the evacuated space. Note: It is ordinarily
`used to cover a pressure range of 10”‘ to 104° conventional
`millimeters of mercury. See also: instrument.
`(EEC/PE) [119]
`ionization voltage A high-frequency voltage appearing at the
`terminals of an arrester, generated by all sources, but partic-
`ularly by ionization current within the arrester, when a power-
`frequency voltage is applied across the terminals.
`(SPD/PE) C62.1l-1999
`ionizing event (gas-filled radiation counter tube) Any inter-
`action by which one or more ions are produced.
`(ED) 161-1971w
`ionizing radiation (1) (A) (air) Particles or photons of sufficient
`energy to produce ionization in their passage through air.
`(B) (air) Particles that are capable of nuclear interactions with
`the release of sufficient energy to produce ionization in air.
`(NPS) 175-1960
`(2) Particles or photons of sufficient energy to produce ion-
`ization in interactions with matter.
`(NI/NPS) 309-1999
`ion migration A movement of ions in an electrolyte as a result
`of the application of an electric potential. See also: ion.
`(EEC/PE) [119]
`ion mobility (1) The theoretical drift speed of a single, isolated
`ion in a liquid or gas, per unit electric field strength. The
`preferred unit is m2/Vs; another commonly used unit is cm2/
`Vs. Ion mobility depends on the ionic species. In air, several
`ionic species can exist simultaneously.
`
`(T&D/PE) 539-1990
`(2) The drift speed of an ion in a liquid or gas per unit electric-
`field strength. The preferred unit is m"/Vs; another commonly
`used unit is crnz/Vs.
`(T&D/PE) 1227-19901‘
`ionogram A record showing the group path delay of ionospheric
`echoes as a function of frequency.
`(AP/PROP) 211-1997
`ionosonde A swept-frequency or stepped frequency instnunent
`that transmits radio waves vertically or obliquely to the ion-
`osphere and uses the echoes to form an ionogram.
`(AP/PROP) 211-1997
`ionosphere (1) (data transmission) That part of the earth’s
`outer atmosphere where ions and free electrons are normally
`present in quantities sufficient to affect propagation of radio
`waves.
`(PE) 599-l985w
`(2) That part of a planetary atmosphere where ions and free
`electrons are present in quantities sufficient to affect the prop-
`agation of radio waves.
`(AP/PROP) 211-1997
`ionosphere disturbance A variation in the state of ionization
`of the ionosphere beyond the normally observed random day-
`to-day variation from average values for the location, date,
`and time of day under consideration. Note.‘ Since it is difficult
`to draw the line between normal and abnormal viations, this
`definition must be understood in a qualitative sense. See also:
`radiation.
`(EEC/PE) [119]
`ionosphere-height error (electronic navigation) The system-
`atic component of the total ionospheric error due to the dif-
`ference in geometrical configuration between ground paths
`and ionospheric paths. See also: navigation.
`(AES/RS) 686-1982s, [42]
`ionospheric error (electronic navigation) The total systematic
`and random error resulting from the reception of the navi-
`gational signal via ionospheric reflections: this error may be
`due to variations in transmission paths, nonuniform height of
`the ionosphere, and nonuniform propagation within the ion-
`osphere. See also: navigation.
`(AES/RS) 686-19825, [42]
`ionospheric absorption The loss of energy from an electro-
`magnetic wave caused by collisions, primarily between elec-
`trons and neutral species and ions in the ionosphere.
`(AP/PROP) 211-1997
`ionospheric mode of propagation Representation of a trans-
`mission path by the number of hops between the end points
`of the path, the ionospheric layers producing the ionospheric
`
`; to studies and/or effects that 09¢
`ing organisms.
`(T&D/PE) 5394‘
`lCt1OI‘lS described in 3.9.l.lof LEE
`that searching for shell function
`)pf6SSCd. See also: execute.
`(C/PA) 9945.2-
`:
`portion of an Integral Process .11,
`re.
`xxQU)['11\./
`r-AO\IA »—
`
`' used to distinguish one directory
`outstanding operations.
`-
`_
`l993w, 1224.2-l993w, 13272-19
`i-A L4»)NO\ to A-4
`) The specific element identifiez-_
`Jonder.
`(SCC32) 1455
`lephone switching systems) Am’,
`zasured-time direct distance
`story number.
`(COM) 3127]
`nput or output or both.
`
`(C) [20]
`(SUB/PE) C37.
`-
`9-
`ontroller; integrated optical circui
`output channel.
`utput circuit.
`it-output controller.
`(IA)
`.
`harged atom or radical.
`molecule, molecular cluster, or
`f one or more electrons has ac
`ms: The inclusion of aeroso1s'(p
`
`i
`
`13.11 ion” and “charged aerosol’
`(T&D/PE) 539-1990, 122
`'
`V
`1
`.tration corrected for the devi
`ions. Note: The activity of a sin
`zver, be measured therrnodyn
`(EEC/PE
`
`.t positive or negative charge of
`le of the electron charge.
`.
`(T&D/PE) 53
`ztorage tubes) Dynamic decay
`orage surface. See also: charge
`(ED) 158
`:ies of ion) The concentration 9
`ons, or of moles or equivalent
`nit volume of an electrolyte. - ~
`(EEC/PE
`
`mplantation (A) (germanium gamma-ray detectors)
`3,-ged-particle detectors) A process in which a beam of
`'
`ions incident upon a solid results in the irnbedding
`hose ions into the material. (B) A process in which a beam
`'1-iergetic ions incident upon a solid results in the implan-
`on of those ions into the material.
`(NPS) 325-1996, 300-1988
`mplanted contact A detector contact consisting of a junc-
`produced by the process of ion implantation. See also:
`
`'
`
`fig, hotons, etc.) to split it into one or more free electrons
`.3-positive ion. Ionization is a special case of charging.
`_
`(PE/IA/I‘&D/PL/APP) [8], [79], 539-1990
`(A) (outdoor apparatus bushings) The formation of lim-
`(1 avalanches of electrons developed in insulation due to an
`“cu-ic field. (B) (outdoor apparatus bushings) Ionization
`is the result of capacitive discharges in an insulating
`"
`edium due to electron avalanches under the influence of an
`ectric field. Note: The occurrence of such currents may
`“' e radio noise and/or damage to insulation.
`,
`(PE/I‘R) 21-1976
`na measurement) Any process by which neutral
`cules or atoms dissociate to form positively and nega-
`'
`(MAG/ET) 436-1977s
`
`,
`.
`ement of electric charges in an ionized medium, under
`’ uence of an applied electric field.
`p
`‘
`&
`(SPDIPE) C62.11-1999
`extinction voltage (cable) (corona level) The min-
`value of falling root-mean-square voltage that sustains
`' discharge within the vacuous or ‘gas-filled spaces in
`le construction or insulation.
`ODE) [4]
`in factor (power distribution, underground cables)
`lectric) The difference between percent power factors at
`ecified values of electric stress. The lower of the two
`s 18 usually so selected that the effect of the ionization
`Wer factor at this stress is negligible.
`(PE) [4]
`n- uge tube An electron tube designed for the meas-
`ntof ‘low gas pressure and utilizing the relationship
`V
`s pressure and ionization current.
`(ED) [45]
`measurement The measurement of the electric cur-
`ting from the movement of electric charges in an
`medium under the influence of the prescribed electric
`A‘
`(PEfI‘R) 21-1976
`pr_corona detector See: discharge detector.
`or corona inception voltage See: discharge incep-
`ag .,
`por corona probe See: discharge probe.
`smoke detector (fire protection devices) A device
`as a small amount of radioactive material which ion-
`‘air in the sensing chamber, thus rendering it conduc-
`
`
`
`ble method; gr
`(Stdl00) :3
`technique.
`ar to an electron gun but in,
`ions. Example: proton g
`-(E ..
`
`onic bombardment of the 61111
`(ED) 161-19
`zube An electron tube CDT“
`(ED) "1
`
`ation area, they decrease the conductance of the air
`hing themselves to the ionsfcausing a reduction in
`1[19’_ when the conductance is less than the predeter-
`'31, the detector circuit responds.
`(NFPA) [16]
`__Ine\(gas tube) The time interval between the ini-
`f Conditions for and the establishment of conduction
`
`Curves relating such factors as condensed-mercury
`5 sanode and_grid currents, anode and grid volt-
`mglllation of the grid current.
`(ED) 161-1971w