| 释义 |
Alfvén Physics.|ˈælfveɪn, -ən|
The name of Hannes Alfvén (b. 1908), Swedish physicist, used with reference to his work in magnetohydrodynamics, as Alfvén speed (or velocity), the speed of an Alfvén wave; Alfvén wave, a transverse magnetohydrodynamic wave travelling in the direction of the magnetic field in a magnetized plasma (described by Alfvén in 1943).
1956Proc. R. Soc. A. CCXXXIII. 359 The first p-mode is an Alfvén wave propagating with Alfvén's phase velocity. 1960J. M. Wilcox et al. in Physics of Fluids III. 15/1 The generation and propagation of Alfvén waves in a gaseous discharge plasma have been reported recently at Berkeley and Harwell. Such hydromagnetic waves were first postulated by Alfvén to account for certain properties of sun spots. 1962W. B. Thompson Introd. Plasma Physics iv. 50 VA is the Alfvén speed, an important speed in magnetohydrodynamics. Ibid. 51 The Alfvén velocity is large. Ibid. vii. 142 This motion, which is common to both ions and electrons, is exactly that experienced by a fluid transmitting Alfvén waves. 1971I. G. Gass et al. Understanding Earth xviii. 259/1 The solar wind is supersonic, in the sense that its speed is ten times the Alfvén wave speed. 1978Nature 26 Oct. 725/2 Accreting matter can pile up at the magnetopause (which in the case of a pulsar would be made up of very low frequency electromagnetic Alfvén waves). |