| magnetic probe | <radiobiology> A conducting coil (sometimes insulated and inserted into the plasma) will have an induced voltage due to changes in the magnetic flux through the coil, and can therefore be used to measure changes in magnetic field strength. Small coils used to measure the local field strength are known as probes. (Other plasma diagnostics using this effect are the Rogowski coil, the voltage loop, and the diamagnetic loop.) Magnetic probes placed outside a toroidal plasma which are used to measure the poloidal magnetic field are also called Mirnov coils. (09 Oct 1997) |
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| magnetic pumping | <radiobiology> Form of plasma heating where the plasma is successively compressed and expanded by means of a fluctuating external magnetic field. (See also adiabatic compression, frozen-in law.) (09 Oct 1997) |
| magnetic reconnection | When a plasma has some resistivity, then the frozen-in flow requirement is relaxed (see frozen-in flow). In that case, the magnetic field can move through the plasma fluid on the resistive (magnetic diffusion) time scale. (Typically slow compared to magnetohydrodynamic timescales.) This allows field lines to reconnect with each other to change their topology in response to magnetic and other forces in the plasma. (see also Helicity, which is not conserved when reconnection is significant.) The predominant theory for solar flares is based on the transfer of energy from magnetic fields to plasma particles which can occur in reconnection. Reconnection can also be studied in the laboratory. (09 Oct 1997) |
| magnetic resonance angiography | Non-invasive method of vascular imaging and determination of internal anatomy without injection of contrast media or radiation exposure. The technique is used especially in cerebral angiography as well as for studies of other vascular structures. (12 Dec 1998) |
| Magnetic Resonance Imaging | A special imaging technique used to image internal stuctures of the body, particularly the soft tissues. An MRI image is often superior to a normal X-ray image. It uses the influence of a large magnet to polarize hydrogen atoms in the tissues and then monitors the summation of the spinning energies within living cells. Images are very clear and are particularly good for soft tissue, brain and spinal cord, joints and abdomen. These scans may be used for detecting some cancers or for following their progress. Acronym: MRI (11 Nov 1997) |
| magnetic resonance imaging, cine | A type of imaging technique used primarily in the field of cardiology. By coordinating the fast gradient-echo mri sequence with retrospective ecg-gating, numerous short time frames evenly spaced in the cardiac cycle are produced. These images are laced together in a cinematic display so that wall motion of the ventricles, valve motion, and blood flow patterns in the heart and great vessels can be visualised. (12 Dec 1998) |
| magnetic resonance scanning | A special imaging technique used to image internal stuctures of the body, particularly the soft tissues. An MRI image is often superior to a normal X-ray image. It uses the influence of a large magnet to polarize hydrogen atoms in the tissues and then monitors the summation of the spinning energies within living cells. Images are very clear and are particularly good for soft tissue, brain and spinal cord, joints and abdomen. These scans may be used for detecting some cancers or for following their progress. Acronym: MRI (11 Nov 1997) |
| magnetic resonance spectroscopy | Detection and measurement of the resonant spectra of molecular species in a tissue or sample. (05 Mar 2000) |
| magnetic stress tensor | <radiobiology> A second-rank tensor, proportional to the dyadic product of the magnetic field (B) with itself. The divergence of the magnetic stress tensor gives that part of the force which a magnetic field exerts on a unit volume of conducting fluid due to the curvature of the magnetic field lines. (09 Oct 1997) |
| magnetic switching | <radiobiology> The use as switches of saturable inductors for producing high power pulses without electrical arcs. This is a principal technology for extending single-shot accelerators in light-ion-beam-driven inertial confinement fusion to repetitively pulsed devices for possible reactors. Three terawatt, 200 KJ magnetic switches have been developed for fusion drivers at Sandia National Laboratories. (Info from the 1985 OSTI Glossary of Fusion Energy, may be out of date.) (09 Oct 1997) |
| magnetic viscosity | <physics> A magnetic field in a conducting fluid will damp fluid motions perpendicular to the field lines, similar to ordinary viscosity, even in the absence of sizeable mechanical forces or electric fields. (09 Oct 1997) |
| magnetical | 1. Pertaining to the magnet; possessing the properties of the magnet, or corresponding properties; as, a magnetic bar of iron; a magnetic needle. 2. Of or pertaining to, or characterised by, the earth's magnetism; as, the magnetic north; the magnetic meridian. 3. Capable of becoming a magnet; susceptible to magnetism; as, the magnetic metals. 4. Endowed with extraordinary personal power to excite the feelings and to win the affections; attractive; inducing attachment. "She that had all magnetic force alone." (Donne) 5. Having, susceptible to, or induced by, animal magnetism, so called; as, a magnetic sleep. See Magnetism. Magnetic amplitude, attraction, dip, induction, etc. See Amplitude, Attraction, etc. Magnetic battery, a combination of bar or horseshoe magnets with the like poles adjacent, so as to act together with great power. Magnetic compensator, a contrivance connected with a ship's compass for compensating or neutralising the effect of the iron of the ship upon the needle. Magnetic curves, curves indicating lines of magnetic force, as in the arrangement of iron filings between the poles of a powerful magnet. Magnetic elements. <chemistry> Those elements, as iron, nickel, cobalt, chromium, manganese, etc, which are capable or becoming magnetic. <physics> A disturbance of the earth's magnetic force characterised by great and sudden changes. Magnetic telegraph, a telegraph acting by means of a magnet. See Telegraph. Origin: L. Magneticus: cf. F. Magnetique. Source: Websters Dictionary (01 Mar 1998) |
| magnetically | By or as by, magnetism. Source: Websters Dictionary (01 Mar 1998) |
| magnetically insulated transmission line | <radiobiology> Used to transport power efficiently in vacuum lines at very high power densities. Although the cathode is a space-charge limited electron emitter, the electron flow is confined by self-generated or applied magnetic fields. MITL's are used extensively in light-ion-driven inertial confinement fusion. (09 Oct 1997) |
| magneticalness | Quality of being magnetic. Source: Websters Dictionary (01 Mar 1998) |
Synonyms : Magnetic, Magnetometries
Synonyms :
Synonyms :
Synonyms :
| magnet |
(physics) a device that attracts iron and produces a magnetic field attraction: a characteristic that provides pleasure and attracts; "flowers are an attractor for bees"
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| magnetic attraction |
magnetism: attraction for iron; associated with electric currents as well as magnets; characterized by fields of force
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| magnetic flux |
a measure of the strength of a magnetic field over a given area magnetic field: the lines of force surrounding a permanent magnet or a moving charged particle
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| magnetic flux density |
magnetic field strength: the amount of magnetic flux in a unit area perpendicular to the direction of magnetic flow
출처: wordnet.princeton.edu/perl/webwn
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| magnetic induction |
magnetization: the process that makes a substance magnetic (temporarily or permanently) magnetic field strength: the amount of magnetic flux in a unit area perpendicular to the direction of magnetic flow
출처: wordnet.princeton.edu/perl/webwn
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| magnet | a dipole with opposing magnetic poles |
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| magnet | (physics) a current loop gives rise to a magnetic field characteristic of a magnetic dipole |
| magnet | (computer science) a memory device consisting of a flat disk covered with a magnetic coating on which information is stored |
| magnet | (computer science) a memory device consisting of a flat disk covered with a magnetic coating on which information is stored |
| magnet | an imaginary line paralleling the equator where a magnetic needle has no dip |
| magnet | the lines of force surrounding a permanent magnet or a moving charged particle |
| magnet | the amount of magnetic flux in a unit area perpendicular to the direction of magnetic flow |
| magnet | the lines of force surrounding a permanent magnet or a moving charged particle |
| magnet | a measure of the strength of a magnetic field over a given area |
| magnet | the amount of magnetic flux in a unit area perpendicular to the direction of magnetic flow |
| magnet | a measure of the strength of a magnetic field per unit area |
| magnet | attraction for iron |