MOTS EN ANGLAIS EN RAPPORT AVEC «THERMIONIC EMISSION»
thermionic emission
thermionic
emission
work
function
electron
tungsten
physics
radiology
current
heat
induced
flow
charge
carriers
from
surface
over
potential
energy
barrier
this
occurs
because
thermal
given
encyclopedia
britannica
discharge
heated
materials
widely
used
source
conventional
tubes
television
picture
university
virginia
inside
solid
there
small
tail
distribution
extends
energies
above
fermi
level
purpose
while
think
quantum
mechanics
being
best
demonstrated
processes
show
discontinuous
change
historically
famu
college
engineering
amount
depends
just
temperature
much
need
escape
photon
enhanced
pete
stanford
proposed
scheme
uses
wide
bandgap
semiconductor
absorber
under
highly
concentrated
sunlight
where
dspace
december
wayne
nottingham
report
identical
with
material
published
handbuch
physik
volume
gcse
bitesize
science
rays
revision
page
process
called
wire
when
large
difference
across
10 LIVRES EN ANGLAIS EN RAPPORT AVEC «THERMIONIC EMISSION»
Découvrez l'usage de
thermionic emission dans la sélection bibliographique suivante. Des livres en rapport avec
thermionic emission et de courts extraits de ceux-ci pour replacer dans son contexte son utilisation littéraire.
1
Iit Foundations - Physics Class 10
Thus thermionic emission is defined as "the phenomenon in which free electrons
are emitted from a metallic surface, by the absorption of heat energy supplied to
them". The electrons thus emitted are called thermions. The free electrons of the ...
2
Transmission Electron Microscopy: A Textbook for Materials ...
A Thermionic Emission If we heat any material to a high-enough temperature, we
can give the electrons sufficient energy to overcome the natural barrier that
prevents them from leaking out from the surface. This barrier is termed the work ...
David B. Williams, C. Barry Carter, 2009
3
Electronics (fundamentals And Applications)
This gives four different modes of electron emission from a metal: (1) thermionic
emission, (2) photoelectric emission, (3) secondary emission, and (4) field
emission. Thermionic emission occurs when the additional energy is supplied to
the ...
4
Plasma Physics and Engineering
Table 8.2 Work Functions of Some Cathode Materials Material Cu Al Mo work
function, the integration (Equation 8.2) leads to the Sommerfeld formula
describing the saturation current density for thermionic emission: W (8.3) Here, R
is a ...
Alexander Fridman, Lawrence A. Kennedy, 2004
5
Quantum Optics of Confined Systems
The thermionic emission rate under a constant-current-driving condition is given [
— -rn(*)l - Lrte J = «(0)exp— -rn(*) - (5) ... V(t) is a junction voltage, V\>\ is a built-
in potential, C is a junction capacitance, rte = kBTC/el is a thermionic emission ...
M. Ducloy, Daniel Bloch, 1996
6
Reference Data for Engineers: Radio, Electronics, Computer, ...
Emission. Thermionic emission originates from the thermally excited electrons
that have sufficient kinetic energy to overcome the vacuum barrier. The sum of all
these thermal electrons gives rise to the Richardson-Dushman equation, which is
...
Wendy Middleton, Mac E. Van Valkenburg, 2002
Current density in the abnormal glow increases, resulting in cathode heating and
growth of thermionic emission, which determines the glow-to-arc transition. The
glow-to-arc transition is continuous in the case of thermionic cathodes made ...
8
Handbook of Infrared Detection Technologies
Another trick to reduce the dark current due to thermionic emission. and optimize
the performance of QWIP is to use bound-to-quasiboimd intersubband absorption
(occurring when the first excited state is in resonance with the top of the well1 ...
Mohamed Henini, M. Razeghi, 2002
9
The IIT Foundation Series - Physics Class 10, 2/e
The corresponding temperature of the metal is known as 'threshold temperature':
Rate of thermionic emission—factors affecting it * Thermionic emission from a
metallic surface is measured by its rate, i.e., the number of thermions emitted per
...
Trishna Knowledge Systems
Modern Physics -• SCOPE OF SYLLABUS •- (i) Thermionic emission; simple
qualitative treatment of a hot cathode ray tube. Simple introduction-electrons in
metals, conduction electrons; thermionic emission; Edison's discovery of
thermionic ...
10 ACTUALITÉS CONTENANT LE TERME «THERMIONIC EMISSION»
Découvrez de quoi on parle dans les médias nationaux et internationaux et comment le terme
thermionic emission est employé dans le contexte des actualités suivantes.
AlN Schottky barrier diode makes its debut
Using a thermionic emission model and electrical data at various temperatures, the researchers estimated a barrier height for this device of 1.1eV at 298K. «Compound Semiconductor, juil 15»
A thermionic energy converter using single-layer graphene
In a paper in Physical Review Applied ("Electron Thermionic Emission from Graphene and a Thermionic Energy Converter"), Shi-Jun Liang and L. K. Ang from ... «Nanowerk, mars 15»
Hot holes for improved injection into nitride LEDs
Solid green and dashed green arrows illustrate the hole transport through intra-band tunneling and thermionic emission, respectively. The team therefore ... «Semiconductor Today, nov 14»
NASA melds vacuum tube tech with silicon to fill the terahertz gap
Instead, a phenomenon called thermionic emission is used—heat a piece of metal up enough, and the thermal energy lets the electrons escape the metal. «Ars Technica, juin 14»
Introducing the Vacuum Transistor: A Device Made of Nothing
How electric current flows in a vacuum tube is very different from how it flows in a transistor, though. Vacuum tubes rely on a process called thermionic emission: ... «IEEE Spectrum, juin 14»
CeRAM Memory Gets ARM's Attention
That is, these devices are in essence Metal-Insulator-Metal "diodes" - that is they obey almost perfectly "Simmons Tunneling Formula with Thermionic Emission" ... «EE Times, févr 14»
Geiger's tube
Wehnelt was a leading authority on thermionic emission and had invented a cylindrical electrode used to create thin focused beams of electrons for microscopes ... «Chemistry World, mars 13»
Stanford's solar cell turbocharger could boost solar power output by …
This new device uses a process called photon-enhanced thermionic emission (PETE). In photovoltaic cells, photons strike a semiconductor (usually silicon), ... «ExtremeTech, mars 13»
Viewpoint: Attention to Nanoscale Detail Leads to Brighter e-Beams
At the inception of this technology, electron guns used thermionic emission from a hot surface, like the filament of a vacuum tube or television CRT. Electrons ... «Physics, févr 13»
Ultra-sensitive electrical biosensor unlocks potential for instant …
"The thermionic emission current injection mechanism of conventional FET based biosensors puts fundamental limitations on their maximum sensitivity and ... «Phys.Org, avril 12»
