The use of magnetic fields allows for the formation of a magnetic lens of variable focusing power, the lens shape originating due to the distribution of magnetic flux.
12.
The latter is essentially a magnetic lens; it focuses the " crossover " ( between the CRT's cathode and G1 electrode, where the electrons pinch together and diverge again ) onto the screen.
13.
As previously stated, by adjusting the magnetic lenses such that the back focal plane of the lens rather than the imaging plane is placed on the imaging apparatus a diffraction pattern can be generated.
14.
A magnetic lens typically consists of several electromagnets arranged in a quadrupole ( see quadrupole magnet ), sextupole, or higher format; the electromagnetic coils are placed at the vertices of a square or another regular polygon.
15.
The technology, which employs a powerful desktop computer and an array of magnetic lenses to overcome " spherical aberrations, " which plague today's electron microscopes, will also permit researchers to peer deeply into materials and create three-dimensional images.
16.
Martin earned his Ph . D . in Physics in 1941, under Robley D . Evans leading to a thesis entitled : " A Study of Nuclear Radiations by Means of a Magnetic Lens Beta Ray Spectrometer ."
17.
The IBM-Nikon Prevail system is based on the ability to steer a small electron beam through a series of magnetic lenses that can achieve the same ultrasharp resolution on the edges of the projection field as in the center of the field.
18.
This allows high precision and high speed of movements, and motivates the use of parallel manipulators in flight simulators ( high speed with rather large masses ) and electrostatic or magnetic lenses in particle accelerators ( very high precision in positioning large masses ).
19.
Some competitors voiced complaints against the Rudenberg patents, but ignored or did not notice the earlier year that Rudenberg began his invention ( 1930 ) nor the difference of the stimulus that initiated it, nor would they recognize the technical differences between his electrostatic electron lenses and the magnetic lenses used by others.
20.
(2 ) Power density ( focusing of the beam ) The power density at the spot of incidence of the beam with the workpiece depends on factors like the size of the electron source on the cathode, the optical quality of the accelerating electric lens and the focusing magnetic lens, alignment of the beam, the value of the accelerating voltage, and the focal length.
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