radiation damping


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radiation damping

[‚rād·ē′ā·shən ‚damp·iŋ]
(electromagnetism)
Damping of a system which loses energy by electromagnetic radiation.
(quantum mechanics)
Damping which arises in quantum electrodynamics from the virtual interaction of a particle with its zero point field.
References in periodicals archive ?
The added mass [[mu].sub.1] and radiation damping [[lambda].sub.1] on the buoy in heave motion can be written as
The point particle limit is endowed with two assumptions; i) when the particle size tends to zero, [[omega].sub.c][tau] [much less than] 1, where [[omega].sub.c] is the cut-off frequency and t is the characteristic time and ii) when the radiation damping term is very small compared to the external force, [[GAMMA].sub.a][[omega].sub.c] [much less than] 1.
In Rueda's approach, the classical particle was considered as a homogeneously charged rigid sphere and to find the energy absorbed by the particle, the radiation damping and binding terms were neglected when compared to the force term in the Lorentz Abraham equation of motion.
Secondly, the radiation loads can be represented by nonlinear vicious drag, hydrodynamic radiation damping, and the above mentioned added-mass effects.
The second effect, labeled as hdr-moor, is the hydrodynamic and mooring loading, which consists of hydrostatics, vicious drag, radiation damping, additional linear damping, and mooring effects.
General Processes besides Electric Dipole Radiation Damping. Most processes through which grains may change angular momentum (except for electric dipole radiation itself, to which we shall come back later on) are characterized by a damping timescale t such that
Collective causes such as interference and building-soil-building interaction dominate during the first phase of shaking and radiation damping dominates the response during the later phase.
(Considering squeeze-film and radiation damping in air, by theory, Q will increase with frequency, and comparisons must be taken between transducers at comparable resonant frequencies.) Compared to a perforated plate, we predicted that the grillage geometry would decrease damping by permitting freer venting of the air beneath the grillage, reducing squeeze- film damping; we interpret these results as evidence qualitatively confirming that prediction.
For a sufficiently large magnetization and a pickup coil with a high quality factor, FID can be influenced by radiation damping [68,71] ie.
Of course the classical account is also consistent with observation; the advantage of the W-F account over the classical one is that the mechanism of radiation is in the former account symmetric in time--a feature of the account that allows it to be recast as an action-at-a-distance theory; in addition, the W-F account allows one to explain radiation damping as the result of a force--specifically, the force exerted by the absorber on the source.
After the velocity potential [phi] is obtained, the added mass and the radiation damping of the bodies, as well as the wave excitation force, can be calculated.
Binary-pulsar tests of strong-field gravity and gravitational radiation damping. arXiv: gr-qc/0402007.