PROBING AND MODELING VOLTAGE BREAKDOWN IN VACUUM
... accelerate particles. Despite some differences, voltage breakdown in microwave resonators shares some features with breakdown in DC vacuum gaps (diodes). In both cases, the localized desorption of gas around an electron emission-source (e.g., field emission) could lead to breakdown. Analytical calcu ...
... accelerate particles. Despite some differences, voltage breakdown in microwave resonators shares some features with breakdown in DC vacuum gaps (diodes). In both cases, the localized desorption of gas around an electron emission-source (e.g., field emission) could lead to breakdown. Analytical calcu ...
Tunneling from a correlated two-dimensional electron system transverse to a... * T. Sharpee and M. I. Dykman P. M. Platzman
... A 2D electron system displays strong correlations if the ratio ⌫ of the characteristic Coulomb energy of the electronelectron interaction e 2 ( n) 1/2 to the characteristic kinetic energy is large 共here, n is the electron density兲. In degenerate systems the kinetic energy is the Fermi energy n/m ...
... A 2D electron system displays strong correlations if the ratio ⌫ of the characteristic Coulomb energy of the electronelectron interaction e 2 ( n) 1/2 to the characteristic kinetic energy is large 共here, n is the electron density兲. In degenerate systems the kinetic energy is the Fermi energy n/m ...
Tunnelling ionization of deep centres in high
... frequencies permit the contactless and uniform application of strong electric fields. Despite the high radiation intensities involved, there is no or only insignificant heating of the electron gas or of the crystal lattice under these conditions [5]. This is the result of the extremely weak absorpti ...
... frequencies permit the contactless and uniform application of strong electric fields. Despite the high radiation intensities involved, there is no or only insignificant heating of the electron gas or of the crystal lattice under these conditions [5]. This is the result of the extremely weak absorpti ...
Maxwell equation simulations of coherent optical photon emission from shock... * Evan J. Reed, Marin Soljačić,
... materials are typically characterized by a state of increasing uniaxial stress, i.e., the spatial gradient in the shock propagation direction component of the stress is nonzero. Such a spatial stress gradient can lead to the creation of a static material polarization or a shift in the existing stati ...
... materials are typically characterized by a state of increasing uniaxial stress, i.e., the spatial gradient in the shock propagation direction component of the stress is nonzero. Such a spatial stress gradient can lead to the creation of a static material polarization or a shift in the existing stati ...
Digital DLTS studies on radiation induced defects in Si, GaAs and GaN
... otherwise take unreasonably long in an LIA system. Secondly, in principle only a single transient is required to do a complete analysis over the whole frequency range – this allows for much faster data acquisition and the recording of “single shot” events as are observed with metastable defects. Thi ...
... otherwise take unreasonably long in an LIA system. Secondly, in principle only a single transient is required to do a complete analysis over the whole frequency range – this allows for much faster data acquisition and the recording of “single shot” events as are observed with metastable defects. Thi ...
A Study of Non-sequential Double Ionization of Atoms in Circularly
... the electron is accelerated by the laser field and recollides with the parent ion and knocks out another electron. This process should be suppressed when the laser field is circularly polarized because recollision is impossible in this case. It is consistent with early experimental results. However, ...
... the electron is accelerated by the laser field and recollides with the parent ion and knocks out another electron. This process should be suppressed when the laser field is circularly polarized because recollision is impossible in this case. It is consistent with early experimental results. However, ...
Re-generable Field Emission Cathodes for
... systems, a series of experiments were conducted to investigate the re-generable emitter tips. The experiments involved re-generating multiple emitter tips so that the electron performance of each re-generated tip could be evaluated and applied to the Fowler-Nordheim model to estimate the emitter tip ...
... systems, a series of experiments were conducted to investigate the re-generable emitter tips. The experiments involved re-generating multiple emitter tips so that the electron performance of each re-generated tip could be evaluated and applied to the Fowler-Nordheim model to estimate the emitter tip ...
IOSR Journal of Applied Physics (IOSR-JAP)
... characteristics of two n+ polysilicon gated n-channel MOSFETs are analyzed to characterize the metal-oxidesemiconductor device structure. The MOSFET data were reported by Eitan and Kolodny in 1983 and Rasras et al. in 2001. The first device has a thermal oxide of 8.5 nm and a substrate bias of -1V [ ...
... characteristics of two n+ polysilicon gated n-channel MOSFETs are analyzed to characterize the metal-oxidesemiconductor device structure. The MOSFET data were reported by Eitan and Kolodny in 1983 and Rasras et al. in 2001. The first device has a thermal oxide of 8.5 nm and a substrate bias of -1V [ ...
Effects Of The Inversion Layer Centroid On MOSFET Behavior
... at 300 K. Nevertheless, the extension of the electron density inside the semiconductor and its effects on capacitance were noted early on by Pals, even at 300 K [2]. Two consequences of this fact that are important for device behavior are that 1) the electric potential value at the interface is grea ...
... at 300 K. Nevertheless, the extension of the electron density inside the semiconductor and its effects on capacitance were noted early on by Pals, even at 300 K [2]. Two consequences of this fact that are important for device behavior are that 1) the electric potential value at the interface is grea ...
V. Discussion
... neutrals for example, within the plasma can be identified. The disadvantage is that analysis of the spectra is complicated. This analysis was accomplished by developing a collisional-radiative (C-R) model, a technique which has been implemented with other helicon plasma experiments. 8,9 Both the arg ...
... neutrals for example, within the plasma can be identified. The disadvantage is that analysis of the spectra is complicated. This analysis was accomplished by developing a collisional-radiative (C-R) model, a technique which has been implemented with other helicon plasma experiments. 8,9 Both the arg ...
Introduction to the Physics of Field Ion Emitters
... in such a way (usually upwards) as to make the surface electrically neutral. With positive applied field, the thermodynamic equilibrium response is for the surface state bands to lift in energy above the bulk Fermi level, making electrons move out of the surface states. This leaves behind positive c ...
... in such a way (usually upwards) as to make the surface electrically neutral. With positive applied field, the thermodynamic equilibrium response is for the surface state bands to lift in energy above the bulk Fermi level, making electrons move out of the surface states. This leaves behind positive c ...
Electron Cooling Simulation for Arbitrary Distribution of Electrons
... possible versions of the electron cooling system design, and its accuracy is insufficient for a design of high energy electron coolers. Recently, modifications of the usual configuration of the low energy electron cooling system were proposed. To avoid instability of the ion beam related to an extre ...
... possible versions of the electron cooling system design, and its accuracy is insufficient for a design of high energy electron coolers. Recently, modifications of the usual configuration of the low energy electron cooling system were proposed. To avoid instability of the ion beam related to an extre ...
Spontaneous Emission of an Excited Atom in a Dusty Unmagnetized
... taking place under the action of the fluctuating field.” Spontaneous emission of light or luminescence is a fundamental process that plays an essential role in many phenomena in nature and forms the basis of many applications, such as fluorescent tubes, older television screens (cathode ray tubes), ...
... taking place under the action of the fluctuating field.” Spontaneous emission of light or luminescence is a fundamental process that plays an essential role in many phenomena in nature and forms the basis of many applications, such as fluorescent tubes, older television screens (cathode ray tubes), ...
ARcHNf. - DSpace@MIT
... continuous-wave terahertz sources shows a lack of devices with power outputs of 1 W or greater between approximately 100 GHz and 10 THz. QCLs are represented by (s), frequency multipliers by (e) and other electronic devices by (-). Cryogenic results are plotted as hollow sym bols. . . . . . . . . . ...
... continuous-wave terahertz sources shows a lack of devices with power outputs of 1 W or greater between approximately 100 GHz and 10 THz. QCLs are represented by (s), frequency multipliers by (e) and other electronic devices by (-). Cryogenic results are plotted as hollow sym bols. . . . . . . . . . ...
Theory of relativistic electron holes in hot plasmas
... holes in the presence of the ion dynamics. A theoretical investigation [14] reveals the trapping and interactions between large-amplitude Langmuir waves and ion holes. The present status of the electron and ion hole physics as well as pertinent simulations and observations are contained in Ref. [15] ...
... holes in the presence of the ion dynamics. A theoretical investigation [14] reveals the trapping and interactions between large-amplitude Langmuir waves and ion holes. The present status of the electron and ion hole physics as well as pertinent simulations and observations are contained in Ref. [15] ...
SIMULATION OF FIELD EMISSION FROM CARBON NANOTUBES USING
... ter scale [4] – is a multidisciplinary field of knowledge which pertains to any technology at the level of the nanoscale that can be utilized in the real world [4]. Owing to the very small length scale, which ranges from a couple of nanometers to a few micrometers, scientists have observed novel phy ...
... ter scale [4] – is a multidisciplinary field of knowledge which pertains to any technology at the level of the nanoscale that can be utilized in the real world [4]. Owing to the very small length scale, which ranges from a couple of nanometers to a few micrometers, scientists have observed novel phy ...
ELECTRIC FIELD ENHANCEMENT FACTORS AROUND A
... emission formula, such as the work function, φ, and screening from neighboring nanotubes that affects the local field. Systematic studies of the effect of the anode location for CNTs were performed by Smith et al.,14 but due to limitations of the software, the emitter was modeled as a parallelepiped cl ...
... emission formula, such as the work function, φ, and screening from neighboring nanotubes that affects the local field. Systematic studies of the effect of the anode location for CNTs were performed by Smith et al.,14 but due to limitations of the software, the emitter was modeled as a parallelepiped cl ...
The Proton Radius Puzzle
... we are seeing is a failure to recognize the charge field. It is an equation miss only in that none of the current equations include charge variations. They aren't including the charge field as a real field in either experiment, so they can't possibly include charge field variations between the two e ...
... we are seeing is a failure to recognize the charge field. It is an equation miss only in that none of the current equations include charge variations. They aren't including the charge field as a real field in either experiment, so they can't possibly include charge field variations between the two e ...
electron theory of metals
... metals, the Lorentz number varies with temperature at low temperatures. This is due to the fact all the electrons may not be participating in conduction process. W is the thermal conductivity of the metal. 4. Drude’s classical free electron theory totally failed to explain the conduction mechanism i ...
... metals, the Lorentz number varies with temperature at low temperatures. This is due to the fact all the electrons may not be participating in conduction process. W is the thermal conductivity of the metal. 4. Drude’s classical free electron theory totally failed to explain the conduction mechanism i ...
P6.3.1.1 - LD Didactic
... visible light. The transitions are extremely rapid (< 10–5 s), so that fluorescence can only be observed during irradiation (in contrast to phosphorescence). ...
... visible light. The transitions are extremely rapid (< 10–5 s), so that fluorescence can only be observed during irradiation (in contrast to phosphorescence). ...
PPT
... b. increase the height of the barrier c. decrease the width of the barrier The frequency of the electron oscillating between the left and right well was too high the probability to “tunnel” was too high! You can reduce this by increasing the barrier height. The wavelength of the emitted photon was ...
... b. increase the height of the barrier c. decrease the width of the barrier The frequency of the electron oscillating between the left and right well was too high the probability to “tunnel” was too high! You can reduce this by increasing the barrier height. The wavelength of the emitted photon was ...
(Theory of electromagnetism and the light) Author: Arman
... and in the atom we mix this formula with the “Hock” law about the spring and after that we extension that to these formulas. We have in the Hock law that F=-k x and the negative mark of the law is for the third law of the Newton that when we enter a force to the spring it will enter a force as the s ...
... and in the atom we mix this formula with the “Hock” law about the spring and after that we extension that to these formulas. We have in the Hock law that F=-k x and the negative mark of the law is for the third law of the Newton that when we enter a force to the spring it will enter a force as the s ...
Anisotropic growth of aluminum nitride nanostructures for a field
... Anisotropic growth of aluminum nitride nanostructures for a field emission application Sang-Wook Ui and Sung-Churl Choi* Division of Materials Science & Engineering, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, Korea One-dimensional single-crystalline AlN nanostructures, which ...
... Anisotropic growth of aluminum nitride nanostructures for a field emission application Sang-Wook Ui and Sung-Churl Choi* Division of Materials Science & Engineering, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, Korea One-dimensional single-crystalline AlN nanostructures, which ...
Adobe Acrobat Format ()
... (C3) The electric field inside a uniformly charged spherical shell is zero. True. Because of symmetry we know that if there were an electric field inside the shell it would be radial. But there is no charge inside the shell, so Gauss’s law gives Er = 0. Therefore the entire electric field must be ze ...
... (C3) The electric field inside a uniformly charged spherical shell is zero. True. Because of symmetry we know that if there were an electric field inside the shell it would be radial. But there is no charge inside the shell, so Gauss’s law gives Er = 0. Therefore the entire electric field must be ze ...