Results 271 to 280 of about 390,595 (315)
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1963
Publisher Summary This chapter focuses on electron emission microscopy, which is characterized by the fact that the imaging electrons are emitted by the specimen itself, and the concepts “cathode” and “specimen” have identical meaning. The first electron emission images were taken by Goldstein in 1878 with a very simple experimental arrangement ...
G. Möllenstedt, F. Lenz
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Publisher Summary This chapter focuses on electron emission microscopy, which is characterized by the fact that the imaging electrons are emitted by the specimen itself, and the concepts “cathode” and “specimen” have identical meaning. The first electron emission images were taken by Goldstein in 1878 with a very simple experimental arrangement ...
G. Möllenstedt, F. Lenz
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Emission by electrons in an undulator
Soviet Physics Journal, 1973Classical-theory methods are applied to the emission from an electron moving in an ideal undulator of infinite length with piecewise-homogeneous magnetic field. The spectral and angular distributions of the radiation are deduced together with the polarization and total power.
V. G. Bagrov +3 more
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1991
Monochromators require feed beams with defined aperture angles and a low energy spread. After presenting some basic concepts of thermionic emission we describe the technical aspects of trajectory calculations in the presence of space charge. Emission systems with differently shaped lenses are studied and their performances are compared.
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Monochromators require feed beams with defined aperture angles and a low energy spread. After presenting some basic concepts of thermionic emission we describe the technical aspects of trajectory calculations in the presence of space charge. Emission systems with differently shaped lenses are studied and their performances are compared.
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2007
Publisher Summary The chapter discusses the widespread application of electron source technology. Particularly important is how the electron charge is handled. The work function and electron affinity of metals and semiconductors is generally expressed in electron volts.
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Publisher Summary The chapter discusses the widespread application of electron source technology. Particularly important is how the electron charge is handled. The work function and electron affinity of metals and semiconductors is generally expressed in electron volts.
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Secondary electron emission by channeled positrons and electrons
Physical Review B, 1989, Nitta, , Ohtsuki
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Ultracoherent Single‐Electron Emission of Carbon Nanotubes
Advanced Materials, 2023Jiuzhou Zhao, Zhenjun Li, Qing Dai
exaly