QUE SIGNIFIE MAGNETIC LENS EN ANGLAIS
Lentille magnétique
Une lentille magnétique est un dispositif de focalisation ou de déviation des particules chargées en mouvement, telles que des électrons ou des ions, en utilisant la force magnétique de Lorentz. Sa force peut souvent être modifiée par l'utilisation d'électro-aimants. Les lentilles magnétiques sont utilisées dans diverses applications, depuis les tubes à rayons cathodiques au microscope électronique jusqu'à les accélérateurs de particules. Une lentille magnétique se compose généralement de plusieurs électroaimants disposés en quadrupôle, sextupole ou format supérieur; Les bobines électromagnétiques sont placées sur les sommets d'un carré ou d'un autre polygone régulier. A partir de cette configuration, un champ magnétique personnalisé peut être formé pour manipuler le faisceau de particules. La particule qui passe est soumise à deux forces vectorielles, et. Provoque la spirale de la particule à travers la lentille, et cette spirale expose l'électron qui à son tour focalise l'électron. Notez que le champ magnétique est inhomogène, les particules proches du centre sont moins fortement déviées que celles qui passent l'objectif loin de l'axe.
définition de magnetic lens dans le dictionnaire anglais
La définition de lentille magnétique dans le dictionnaire est un ensemble d'aimants, esp électro-aimants, utilisés pour focaliser ou défocaliser un faisceau de particules chargées dans un microscope électronique, un accélérateur de particules, ou un dispositif similaire.
MOTS EN ANGLAIS EN RAPPORT AVEC «MAGNETIC LENS»
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10 LIVRES EN ANGLAIS EN RAPPORT AVEC «MAGNETIC LENS»
Découvrez l'usage de
magnetic lens dans la sélection bibliographique suivante. Des livres en rapport avec
magnetic lens et de courts extraits de ceux-ci pour replacer dans son contexte son utilisation littéraire.
1
Physical Principles of Electron Microscopy: An Introduction ...
The thin-lens approximation also simplifies analysis of the effect of the magnetic
forces acting on a charged particle, leading to a simple expression for the
focusing power (reciprocal of focal length) of a magnetic lens: 1/f= [e2/(8mE0)]
Bz2 dz ...
2
Handbook of Microscopy for Nanotechnology
Magnetic lens As in the electric case, an axially symmetric magnetic field also
has lens characteristics and is called a magnetic lens. The paraxial ray equation
for a magnetic lens is written as: d2r dz2 = q mrB20 8V (5) whereB 0 is the ...
Nan Yao, Zhong Lin Wang,
2006
3
Reflection High-Energy Electron Diffraction
In this case we observe a disk at a certain position, the Magnetic lens Magnetic
deflector Anode Wehnelt electrode Cathode v ' / / ( W-hairpin-f i lament) 1 5 mm
Figure 3.2 A schematic illustration of a typical laboratory-constructed electron gun
.
Ayahiko Ichimiya, Philip I. Cohen,
2004
4
Light and Electron Microscopy
Beyond the field limits, the beam again travels in a straight line, but it has been
deflected from its original direction according to the strength and extent of the
magnetic field.6 6.8.2 Action of the magnetic lens As shown in the preceding
section, ...
Elizabeth M. Slayter, Henry S. Slayter,
1992
5
Scanning Electron Microscopy: Physics of Image Formation and ...
2.12 shows the combination of a conical magnetic lens and an electrostatic lens [
2.53-55]. The latter consists of an inner electrode at the acceleration potential
and an outer electrode at earth UoccO— . Magnetic lens Electrostatic lens ...
6
Istfa 2003: Proceedings of the 29Th International Symposium ...
Due to the design as a combination of a magnetic lens together with an
electrostatic immersion lens (Fig. 4), the aberration coefficients decrease with
decreasing electron energy (Fig. 4). This results in an ultrahigh resolution even at
very low ...
7
Intense Electron and Ion Beams
The matrix equation for the thick symmetrical magnetic lens coincides with the
one used for the thick symmetrical unipotential electrostatic lens. 3.10.3
Parameters of Some Magnetic Lenses Thin Coil The simplest magnetic lens is
created by ...
Sergey Ivanovich Molokovsky, A. D. Sushkov,
2005
8
Handbook of Charged Particle Optics, Second Edition
When V2 equals V3, the excitation of the magnetic lens becomes NI = 1174 AT.
An interesting thing is that, this value is nearly the same as the excitation of a
TEM/SEM lens at 20 kV. When the same objective lens shape is used in a TEM/
SEM ...
9
Towards an Unambiguous Electron
Magnetic Chiral Dichroism ...
On contrary, also the stray field of the commutated objective lens system might
degrade the imaging quality of the microscope as the focal length of a magnetic
lens is finally defined by the magnitude of the magnetic field. To clarify this
question ...
10
Introduction to Conventional Transmission Electron Microscopy
The main purpose of a round magnetic lens is to focus the electron beam towards
the optical axis. The basic principle behind such a lens is shown in Fig. 3.3(a): a
circular current running through a coil produces a magnetic field that is nearly ...
10 ACTUALITÉS CONTENANT LE TERME «MAGNETIC LENS»
Découvrez de quoi on parle dans les médias nationaux et internationaux et comment le terme
magnetic lens est employé dans le contexte des actualités suivantes.
How To Fix iPhone 6 Plus Blurry Camera Photos
With iPhone 6 Plus, a metallic case or magnetic lens could interfere with optical image stabilization. If you have a metallic case or magnetic lens ... «StudentNewsIE.com, juil 15»
How To Fix Common iPhone 6 Plus Problems [Part 13]
Sometimes, a metallic case or magnetic lens may interfere with the camera function, particularly with the optical image stabilization feature. «StudentNewsIE.com, juin 15»
ZTYLUS iPhone 6 Plus Case, Lens and Ring Light Review
A detachable magnetic lens comes off the wide-angle lens to transform it into a macro lens. The circular polarizer lens includes a dial. Spin it to ... «Gotta Be Mobile, mai 15»
How To Fix Common iPhone 6 Plus Problems [Part 11]
With iPhone 6 Plus, a metallic case or magnetic lens could interfere with optical image stabilization. If you have a metallic case or magnetic lens ... «StudentNewsIE.com, mai 15»
How To Fix Common iPhone 6 Plus Problems [Part 10]
With iPhone 6 Plus, a metallic case or magnetic lens could interfere with optical image stabilization. If you have a metallic case or magnetic lens ... «StudentNewsIE.com, avril 15»
Geek deals: Lytro 8GB light-field camera for $60
This also ships with a magnetic lens cap for travel, a wrist strap, and USB 2.0 cable for charging and transferring your pictures. And when you ... «Geek, avril 15»
How To Fix Common iPhone 6 Plus Problems [Part 9]
With iPhone 6 Plus, a metallic case or magnetic lens could interfere with optical image stabilization. If you have a metallic case or magnetic lens ... «StudentNewsIE.com, avril 15»
How To Fix Common iPhone 6 Plus Problems [Part 8]
With iPhone 6 Plus, a metallic case or magnetic lens could interfere with optical image stabilization. If you have a metallic case or magnetic lens ... «StudentNewsIE.com, mars 15»
How To Fix Common iPhone 6 Plus Problems [Part 7]
With iPhone 6 Plus, a metallic case or magnetic lens could interfere with optical image stabilization. If you have a metallic case or magnetic lens ... «StudentNewsIE.com, mars 15»
How To Fix Common iPhone 6 Problems [Part 6]
With iPhone 6 Plus, a metallic case or magnetic lens could interfere with optical image stabilization. If you have a metallic case or magnetic lens ... «StudentNewsIE.com, févr 15»