electron lens

Quantum theory of electron lenses based on the Dirac equation.

Furthermore, electron lenses allows the geometry of the diffraction experiment to be varied.

This gun, combined with inventions in electron lenses and detection, led to the development of the highest resolution microscope at that time.

The electrons are accelerated and focused into a beam, typically about 0.1 to 0.5 mm wide, by a series of electrodes serving as electron lenses.

Electromagnetic quadrupole electron lenses are used, the number of which depends on how much resolution and focusing flexibility the designer wishes.

These electron are then focus using electron lenses inside the intensifier to an output screen coated with phosphorescent materials.

Electron lenses are manufactured from iron, iron-cobalt or nickel cobalt alloys, such as permalloy.

Electron lenses are designed to act in a manner emulating that of an optical lens, by focusing parallel rays at some constant focal length.

Tom was intent on the electron lenses he was constructing, but when he glanced up, he could tell by Ames's expression that something was wrong.

The task of the monochromator is to reduce the energy of the passing electrons to some eV due to the help of electron lenses.

The majority of electron lenses for TEM utilise electromagnetic coils to generate a convex lens.

Physics 14, 434-436, (in which Rudenberg describes stimulus to begin his work, also patent excerpts showing his electrostatic aperture electron lenses).

The resolution of conventional electron microscopy is not limited by electron wavelength, but by the large aberrations of electron lenses.

In 1931, he demonstrated that a magnetic coil could act as an electron lens, and used several coils in a series to build the first electron microscope in 1933.

Since the electrons in parallel beams are traveling equally fast, they will persistently repel one another, while the electron lenses act over only a portion of the electrons' trajectories.

The aberration corrected microscope PEEM-3 employs a curved electron mirror to counter the lowest order aberrations of the electron lenses and the accelerating field.

The electron lenses and voltage divider of the PEEM were incorporated into one version of a PEEM for biological studies in Eugene, Oregon around 1970.

"Your meteor is going to take on a charge of phenomenal negative value, and the rest of your beam is going to be deflected away, just as your electron lenses deflect the original beam," said Channing.

The electron optical column contains two or more electrostatic or magnetic electron lenses, corrector elements such as a stigmator and deflector, an angle-limiting aperture in the backfocal plane of one of the lenses (Figure 4).

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.

Rather than have the electron gun at a high potential and the rest of the instrument (including electron lenses and specimen) at ground, an electrostatic immersion objective lens brings the sample close to that of the gun, slowing down the high energy electrons to a desired energy only just before interacting with the sample surface.