Little big photon - Research Laboratory of Electronics
... then interact with one another because the first photon modifies the atom’s state, and hence the atom’s response to the second photon. What, then, is the limit to the interaction of one photon with one atom? The basic situation is depicted in Figure 1: A weak light beam is focused onto an area A con ...
... then interact with one another because the first photon modifies the atom’s state, and hence the atom’s response to the second photon. What, then, is the limit to the interaction of one photon with one atom? The basic situation is depicted in Figure 1: A weak light beam is focused onto an area A con ...
TECHNOLOGIEWACHT:
... EMC stands for “Electro Magnetic Compatibility”. Two devices are compatible with each other when the first one does not disturb the second one and vice versa. In case one device influences/disturbs the other one, EMI (Electro Magnetic Interference) occurs which must be avoided. The main principle of ...
... EMC stands for “Electro Magnetic Compatibility”. Two devices are compatible with each other when the first one does not disturb the second one and vice versa. In case one device influences/disturbs the other one, EMI (Electro Magnetic Interference) occurs which must be avoided. The main principle of ...
AND Gate - touqeer hussain
... Tungsten filament heated by 6 V. • A beam of electron produces a supply. A high +ve potential is applied to cylindrical anode to accelerate the electron to a high speed and they shoot straight through the hole of the anode as a fine beam of electrons. This beam of electron is cathode ray because the ...
... Tungsten filament heated by 6 V. • A beam of electron produces a supply. A high +ve potential is applied to cylindrical anode to accelerate the electron to a high speed and they shoot straight through the hole of the anode as a fine beam of electrons. This beam of electron is cathode ray because the ...
Section-A Oscilloscope
... brightness,which can be seriously impaired at high frequencies. Below 10 MHz ,monoaccelerator may be used. If signals of frequencies higher than 10 MHz are to displayed,post deflection acceleration tubes(PDA) or post accelerators is necessary to increse the brightness of the trace which otherwise wo ...
... brightness,which can be seriously impaired at high frequencies. Below 10 MHz ,monoaccelerator may be used. If signals of frequencies higher than 10 MHz are to displayed,post deflection acceleration tubes(PDA) or post accelerators is necessary to increse the brightness of the trace which otherwise wo ...
Photomultiplier
Photomultiplier tubes (photomultipliers or PMTs for short), members of the class of vacuum tubes, and more specifically vacuum phototubes, are extremely sensitive detectors of light in the ultraviolet, visible, and near-infrared ranges of the electromagnetic spectrum. These detectors multiply the current produced by incident light by as much as 100 million times (i.e., 160 dB), in multiple dynode stages, enabling (for example) individual photons to be detected when the incident flux of light is very low. Unlike most vacuum tubes, they are not obsolete.The combination of high gain, low noise, high frequency response or, equivalently, ultra-fast response, and large area of collection has maintained photomultipliers an essential place in nuclear and particle physics, astronomy, medical diagnostics including blood tests, medical imaging, motion picture film scanning (telecine), radar jamming, and high-end image scanners known as drum scanners. Elements of photomultiplier technology, when integrated differently, are the basis of night vision devices.Semiconductor devices, particularly avalanche photodiodes, are alternatives to photomultipliers; however, photomultipliers are uniquely well-suited for applications requiring low-noise, high-sensitivity detection of light that is imperfectly collimated.