نتایج جستجو برای: electron injection
تعداد نتایج: 459943 فیلتر نتایج به سال:
The effects of the feedback of e+-e pair reinjection in a plasma due to photon photon absorption of its own radiation is examined. Under the assumption of euntinuous electron injection with a power law spectrum E-r and Compton losses only , it is shown that for r < 2 the steady state electron distribution function has a unique form independent of the primary injection spectrum. This electron di...
Materials with strong reducibility have been used as electron injection layers (EILs) to lower the work function of cathodes and reduce the driving voltage of organic light-emitting diodes (OLEDs). However, the most prominent electron injection materials presented so far are high-temperature-evaporable inorganic salts based on alkaline metals, which suffer from a high tendency of metal diffusio...
Energy confinement comparable with tokamak quality is achieved in the Madison Symmetric Torus (MST) reversed field pinch (RFP) at a high beta and low toroidal magnetic field. Magnetic fluctuations normally present in the RFP are reduced via parallel current drive in the outer region of the plasma. In response, the electron temperature nearly triples and beta doubles. The confinement time increa...
Highly resistive undoped p-type gallium oxide samples were subjected to cumulative proton irradiation with energies ranging from 25 70 keV and doses in the 1.6 × 10 14 –3.6 cm ?2 range. Proton resulted up a factor of 2 reduction minority electron diffusion length for temperatures between ? 300 400 K. Electron injection into under test using scanning microscope beam leads pronounced elongation b...
Electron injections are critical processes associated with magnetospheric substorms, which deposit significant electron energy into the ionosphere. Although wave scattering of <10 keV electrons during has been well studied, link between magnetotail and energetic (≥100 keV) precipitation remains elusive. Using conjugate observations Loss Fields Investigation (ELFIN) Magnetospheric Multiscale (MM...
[ 1 ] Linear accelerators producing relativistic (5 MeV) electron beams are now down to a size that allows them to be flown on spacecraft and sounding rockets. This opens up new opportunities for atmospheric/ionospheric modification experiments where the mesosphere and lower thermosphere regions can be perturbed down to 40-km altitude. In this paper the relativistic electron beam injection proc...
We have developed an ampliier which removes its "ooset" as a natural part of its operation by modifying the charge on a oating gate. The charge on the oating gate is adapted by a combination of electron tunneling and hot-electron injection , resulting in a nonlinear high-pass lter with a cutoo frequency less than 1 Hz. We show experimental data from this autozeroing ampliier for various input w...
An abrupt p n junction, such as occurs at the collector junction of an n-p-n transistor, is considered. The ratio of nto p-region conductivity is taken to be very high, so that the transition region is restricted almost entirely to the p-region. The electron density distri bution n within the transition region is investigated as a fUnction of the applied r everse bias V , and of the minority ca...
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