Nuclear Medicine Physics
... photocathod directly coupled to detector or connected using plastic light guides anode connected to electronics in the tube base ultrasensitive to ...
... photocathod directly coupled to detector or connected using plastic light guides anode connected to electronics in the tube base ultrasensitive to ...
fundamental properties of solar cells
... Graph of cell output current (red line) and power (blue line) as function of voltage. Also shown are the cell short-circuit current (Isc) and open-circuit voltage (Voc) points, as well as the maximum power point (Vmp, Imp). Click on the graph to see how the curve changes for a cell with low FF. ...
... Graph of cell output current (red line) and power (blue line) as function of voltage. Also shown are the cell short-circuit current (Isc) and open-circuit voltage (Voc) points, as well as the maximum power point (Vmp, Imp). Click on the graph to see how the curve changes for a cell with low FF. ...
2. Link Margin Calculations
... where n is the refractive index of the concentrator material. Typical values of n for glass and plastic are in the order of n ≈ 1.5. Suitably designed concentrators are able to approach the fundamental Etendue limit in practice. Hence, (4) can be used to accurately model the gain of the optics on th ...
... where n is the refractive index of the concentrator material. Typical values of n for glass and plastic are in the order of n ≈ 1.5. Suitably designed concentrators are able to approach the fundamental Etendue limit in practice. Hence, (4) can be used to accurately model the gain of the optics on th ...
Time-resolved atomic inner-shell spectroscopy
... energy spectrum is broadened and broken up into sidebands spaced by h qL at any Dt within the range of temporal overlap of electron emission and the laser pulse13–16. The sidebands originate from quantum interferences between different portions of the ejected electron wave packet experiencing the s ...
... energy spectrum is broadened and broken up into sidebands spaced by h qL at any Dt within the range of temporal overlap of electron emission and the laser pulse13–16. The sidebands originate from quantum interferences between different portions of the ejected electron wave packet experiencing the s ...
Microwave Devices Faculty of Engineering EMF2026 MULTIMEDIA
... bunch with electron A. Similarly, an electron C that passes through the gap after A emerges with a lower initial velocity and therefore takes less time to return to the resonator. Electron C catches up with electron A and bunch with electrons A and B. The electron bunches formed as described above w ...
... bunch with electron A. Similarly, an electron C that passes through the gap after A emerges with a lower initial velocity and therefore takes less time to return to the resonator. Electron C catches up with electron A and bunch with electrons A and B. The electron bunches formed as described above w ...
Physics Items - Memphis Radiological
... A. Incorrect. X-rays are converted to latent image electrons in the BaFBr storage phosphor, then “processed” by a scanning laser beam which then produces light photons that are reconverted to electrons by a photomultiplier tube, and then digitized. B. Incorrect. X-rays are converted to light photons ...
... A. Incorrect. X-rays are converted to latent image electrons in the BaFBr storage phosphor, then “processed” by a scanning laser beam which then produces light photons that are reconverted to electrons by a photomultiplier tube, and then digitized. B. Incorrect. X-rays are converted to light photons ...
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.