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Author: John N. Bradford Publisher: ISBN: Category : Electromagnetic pulse Languages : en Pages : 34
Book Description
Electron fluxes generated by photons or charged particles interacting with solid materials can emerge from the boundaries of those materials. The electron current densities arising from these spectra constitute source functions for vulnerability studies on systems exposed to internal electromagnetic pulse (IEMP, SGEMP). Absolute yield measurements have been made from tantalum, molybdenum, copper, and aluminum. The energy and angular distribution have been determined and are used as comparison bases for computation. Examples from several sources are described.
Author: John N. Bradford Publisher: ISBN: Category : Electromagnetic pulse Languages : en Pages : 34
Book Description
Electron fluxes generated by photons or charged particles interacting with solid materials can emerge from the boundaries of those materials. The electron current densities arising from these spectra constitute source functions for vulnerability studies on systems exposed to internal electromagnetic pulse (IEMP, SGEMP). Absolute yield measurements have been made from tantalum, molybdenum, copper, and aluminum. The energy and angular distribution have been determined and are used as comparison bases for computation. Examples from several sources are described.
Author: John N. Bradford Publisher: ISBN: Category : Electromagnetic pulse Languages : en Pages : 0
Book Description
Electron fluxes generated by photons or charged particles interacting with solid materials can emerge from the boundaries of those materials. The electron current densities arising from these spectra constitute source functions for vulnerability studies on systems exposed to internal electromagnetic pulse (IEMP, SGEMP). Absolute yield measurements have been made from tantalum, molybdenum, copper, and aluminum. The energy and angular distribution have been determined and are used as comparison bases for computation. Examples from several sources are described.
Author: Publisher: Springer ISBN: 3540474471 Category : Science Languages : en Pages : 227
Book Description
Electron emission is a fundamental phenomenon which accompanies most interactions of energetic particles with solid surfaces. Not only is it a special effect which for almost ninety years has attracted the interest of physicists, but it is also of acute importance in such fields as radiation effects and transport phenomena in solids (e.g., radiation biology), plasma-surface interactions, microtechnology, surface analysis, ion microscopies, particle detector development and others. While Volume I emphasizes the theoretical description of the mechanisms of electron emission, this volume reviews modern experimental trends and aspects of the phenomenon, e.g., kinetic electron emission from massive solids and from thin foils under bombardment with positive, negative, and neutral particles, and the measurement of electron statistics in connection with potential and kinetic emission due to slow singly and multiply charged projectiles.
Author: Publisher: ISBN: Category : Languages : en Pages : 22
Book Description
Energy dependent electron emission between zero and 1.4 keV generated by the natural reactivity of plutonium was measured by an electrostatic spectrometer with known acceptance angle and acceptance area. The electron spectral intensity decreases continuously except for a distinctive feature of unknown origin at approximately 180eV. The spectrum was converted to energy dependent electron flux (e/cm2 s) using the assumption that the emission has a cosine angular distribution. The energy dependent electron mean free path in gases and literature cross sections for electron induced reactions were used to determine the number of ionization and dissociation reactions per cm2 second, found to be about 8*108/cm2s and 1.5*108/cm2s, respectively, for hydrogen. These results are to be used with caution until complementary measurements can be made, e.g. independent measurement of the total emitted electron current, since the results here are based on the assumption that the electron emission has a cosine angular distribution. That is unlikely to be correct.
Author: Publisher: Springer ISBN: 3540487239 Category : Science Languages : en Pages : 138
Book Description
This monograph discusses collision-induced electron emission from nearly free-electron metals by ion or electron impact. This subject is, as is well known, of acute importance in understanding plasma-wall interactions in thermonuclear reactors. It is also the basis for one of the most exciting technological developments of the last few years - scanning electron miscroscopy. Several electron excitation mechanisms of electrons in the target are considered: excitation of single conduction and core electrons, excitation by plasmon decay and by Auger processes. Transport of inner excited electrons is simulated by the Boltzmann equation incorporating both elastic and inelastic collisions. The numerical calculation of scattering rates uses a dynamically screened Coulomb interaction. These results for the energy distributions of emerging electrons as well as the electron yield are compared with recent experimental measurements on electron emission from polycrystalline aluminum.
Author: Hannspeter Winter Publisher: Springer Science & Business Media ISBN: 3540707883 Category : Science Languages : en Pages : 254
Book Description
The emission of electrons from solid surfaces bombarded by slow neutral and ionized heavy particles (atoms, molecules) is reviewed both theoretically and in the light of recent experimental studies by leading groups in the field. The book integrates physics of ion beams, surfaces and chemical physics, and serves both as a reference work for researchers and a textbook for graduate students.
Author: John N. Bradford
Author: John N. Bradford
Author: Atomic Energy of Canada Limited
Author: John N. Bradford
Author: 
Author: 
Author: Keith F. Eckerman
Author: 
Author: Hannspeter Winter
Author: James N. Anno
Author: E. A. Warman