Search results
Results From The WOW.Com Content Network
As an application example, the steady-state space-charge-limited current across a piece of intrinsic silicon with a charge-carrier mobility of 1500 cm 2 /V-s, a relative dielectric constant of 11.9, an area of 10 −8 cm 2 and a thickness of 10 −4 cm can be calculated by an online calculator to be 126.4 μA at 3 V. Note that in order for this ...
This behavior is typical of true vacuum tubes that don't contain mercury vapor; larger voltages lead to larger "space-charge limited current". At 4.9 volts the current drops sharply, almost back to zero. The current then increases steadily once again as the voltage is increased further, until 9.8 volts is reached (exactly 4.9+4.9 volts).
Research to date into human psychological and sociological effects based on on-orbit near-Earth experiences may have limited generalizability to a long-distance, multi-year space expedition, such as a mission to a near-Earth asteroid (which currently is being considered by NASA) or to Mars. In the case of Mars, new stressors will be introduced ...
Quantitative psychological research findings result from mathematical modeling and statistical estimation or statistical inference. The two types of research differ in the methods employed, rather than the topics they focus on. There are three main types of psychological research: Correlational research; Descriptive research; Experimental research
The perveance defines the space charge limited current that can be emitted from a device. The figure below displays commercial examples of thermionic emitters and electron guns produced at Heatwave Labs Inc. Example of an electron emitting a) Thermionic Emitter and an electron accelerating b) Electron Gun Assembly [42]
Cross-sectional research is a research method often used in developmental psychology, but also utilized in many other areas including social science and education. This type of study utilizes different groups of people who differ in the variable of interest, but share other characteristics such as socioeconomic status, educational background ...
It was first used to give the space-charge-limited current in a vacuum diode with electrode spacing d. It can also be inverted to give the thickness of the Debye sheath as a function of the voltage drop by setting J = j i o n s a t {\displaystyle J=j_{\mathrm {ion} }^{\mathrm {sat} }} :
A revisitation of this latter assumption can be found, for example, in the “theory of space charge limited current enhanced by Frenkel effect” developed by Murgatroyd. [5] The carriers mobility is assumed to be field-independent.