Ultrafast Dynamics of Coherent Optical Phonons in Bismuth
... The work presented in this thesis is devoted to the study of femtosecond laser induced coherent atomic motion (phonons) . The investigation of phonons is a field of fundamental importance, as this atomic motion can play a key role in the dynamics of phase transitions. In the framework of this thesis ...
... The work presented in this thesis is devoted to the study of femtosecond laser induced coherent atomic motion (phonons) . The investigation of phonons is a field of fundamental importance, as this atomic motion can play a key role in the dynamics of phase transitions. In the framework of this thesis ...
studies of electron cyclotron resonance ion source plasma physics
... To be presented, by permission of the Faculty of Mathematics and Science of the University of Jyväskylä, for public examination in Auditorium FYS-1 of the University of Jyväskylä on Decenber 16, 2005 ...
... To be presented, by permission of the Faculty of Mathematics and Science of the University of Jyväskylä, for public examination in Auditorium FYS-1 of the University of Jyväskylä on Decenber 16, 2005 ...
Mastering the Chemistry Core 40
... The diagram above shows how alpha, beta, and gamma rays are affected by two electrically charged plates. Based on the paths the rays follow, what are the respective charges of alpha, beta, and gamma rays? ...
... The diagram above shows how alpha, beta, and gamma rays are affected by two electrically charged plates. Based on the paths the rays follow, what are the respective charges of alpha, beta, and gamma rays? ...
Formation of two-dimensional electron gas at AlGaN
... High electron mobility transistors (HEMTs) based on AlGaN/GaN heterostructures have been widely studied and have exhibited outstanding performances in high-power and highfrequency devices. [1] Unlike conventional HEMTs made of modulation-doped semiconductor heterostructures, no intentional doping is ...
... High electron mobility transistors (HEMTs) based on AlGaN/GaN heterostructures have been widely studied and have exhibited outstanding performances in high-power and highfrequency devices. [1] Unlike conventional HEMTs made of modulation-doped semiconductor heterostructures, no intentional doping is ...
Plasma and trap-based techniques for science with positrons
... frequency proportional to the plasma density. The limit arises from the fact that there is a maximum value of the plasma number density nB for which the resulting inward Lorentz force can continue to provide the required centripetal force to keep the spinning plasma confined (Davidson, 1990). While ...
... frequency proportional to the plasma density. The limit arises from the fact that there is a maximum value of the plasma number density nB for which the resulting inward Lorentz force can continue to provide the required centripetal force to keep the spinning plasma confined (Davidson, 1990). While ...
Novel materials and processes for gate dielectrics on Silicon carbide
... philosophy spring from this simple achievement. Another simple advance will provoke the next revolution, the printing press. The process was developed independently in China and Europe. Before the invention of printing, multiple copies of a manuscript had to be made by hand, a laborious task that co ...
... philosophy spring from this simple achievement. Another simple advance will provoke the next revolution, the printing press. The process was developed independently in China and Europe. Before the invention of printing, multiple copies of a manuscript had to be made by hand, a laborious task that co ...
Strongly Interacting Fermi Gases - Research Laboratory of Electronics
... model of the atomic gas, but know only approximate solutions to that model. Experiments on the system provide information about the exact solution. Comparing the results of experiments to different approximate solutions allows researchers to identify successful methods of approximation. Conservation ...
... model of the atomic gas, but know only approximate solutions to that model. Experiments on the system provide information about the exact solution. Comparing the results of experiments to different approximate solutions allows researchers to identify successful methods of approximation. Conservation ...
Physics of Radio-Frequency Plasmas
... discharges tend to operate in a high current regime. The current is carried in a narrow channel in which there is a plasma with its charged and neutral constituents in near-thermal equilibrium (all species comprising the medium having roughly the same temperature of about 10 000 K). Familiar example ...
... discharges tend to operate in a high current regime. The current is carried in a narrow channel in which there is a plasma with its charged and neutral constituents in near-thermal equilibrium (all species comprising the medium having roughly the same temperature of about 10 000 K). Familiar example ...
Decomposition of trichloroethylene in a plasma
... Plasma-assisted catalysis is able to eliminate toxic pollutants at low temperature due to a higher energy efficiency leading to a low energy cost. Furthermore, the development of a suitable catalyst will help to optimize the selectivity into environmentally more friendly end products. By placing the ...
... Plasma-assisted catalysis is able to eliminate toxic pollutants at low temperature due to a higher energy efficiency leading to a low energy cost. Furthermore, the development of a suitable catalyst will help to optimize the selectivity into environmentally more friendly end products. By placing the ...
Microwave Spectroscopy of Two-Dimensional Electrons in Tilted Magnetic Field
... around ν ∼ 1/6 (84). But exact prediction is challenging (24, 66, 82, 84, 87, 141, 166, 174) because at low ν the energy curves of the two types of states can come so close to each other that a small error in the estimation can vastly affect the prediction. There have also been propositions (15, 16, ...
... around ν ∼ 1/6 (84). But exact prediction is challenging (24, 66, 82, 84, 87, 141, 166, 174) because at low ν the energy curves of the two types of states can come so close to each other that a small error in the estimation can vastly affect the prediction. There have also been propositions (15, 16, ...
Cassini observations of low energy electrons in and around
... magnetopause, which forms the boundary between the region of space dominated by the planetary magnetic field and currents, and the interplanetary magnetic field. The second concerns the high energy electrons fluxes in the inner magnetosphere, and the effects caused when the icy moons carve out cavit ...
... magnetopause, which forms the boundary between the region of space dominated by the planetary magnetic field and currents, and the interplanetary magnetic field. The second concerns the high energy electrons fluxes in the inner magnetosphere, and the effects caused when the icy moons carve out cavit ...
THE SCIENCE OF JET
... Plasmas and Magnetic Fields If the temperature of a gas is raised above about 10,000K virtually all of the atoms become ionised, with electrons becoming separated from their nuclei. The resulting ions and electrons then form two intermixed fluids. However, the electrostatic attraction between their ...
... Plasmas and Magnetic Fields If the temperature of a gas is raised above about 10,000K virtually all of the atoms become ionised, with electrons becoming separated from their nuclei. The resulting ions and electrons then form two intermixed fluids. However, the electrostatic attraction between their ...
A simulation of electromigration-induced transgranular slits Weiqing Wang and Z. Suo
... than 1 mm wide and about 0.5 mm thick. They carry electric current up to 1010 A/m2, and operate near half of aluminum’s melting temperature ~933 K!. As a result of the small dimensions, intense currents, and elevated temperatures, solid-state mass diffusion driven by the electron wind, known as elec ...
... than 1 mm wide and about 0.5 mm thick. They carry electric current up to 1010 A/m2, and operate near half of aluminum’s melting temperature ~933 K!. As a result of the small dimensions, intense currents, and elevated temperatures, solid-state mass diffusion driven by the electron wind, known as elec ...
Charge Losses in Silicon Sensors and Electric Field
... strip sensor is shown, eh pairs are generated along the trajectory of a charged particle and are collected at the electrodes due to the applied bias voltage and local electric fields. (n-type silicon) or by acceptors (p-type silicon). Donors have five valence electrons. Four of these electrons will ...
... strip sensor is shown, eh pairs are generated along the trajectory of a charged particle and are collected at the electrodes due to the applied bias voltage and local electric fields. (n-type silicon) or by acceptors (p-type silicon). Donors have five valence electrons. Four of these electrons will ...