A REMOTELY CONTROLLED ELECTRON GUN FOR A 200 keV ELECTROSTATIC ACCELERATOR By
... only one year after Cockroft and Walton completed their accelerator. This generator accelerated protons using a 1 m diameter spherical high voltage terminal. In 1935 they constructed an accelerator with a 1 m diameter high voltage terminal and a 2 m diameter intermediate voltage dividing shell. This ...
... only one year after Cockroft and Walton completed their accelerator. This generator accelerated protons using a 1 m diameter spherical high voltage terminal. In 1935 they constructed an accelerator with a 1 m diameter high voltage terminal and a 2 m diameter intermediate voltage dividing shell. This ...
Visualization of optical deflection and switching operations by a
... In the past ten years, the growing need for optical switches, laser scanning, and highbandwidth signal processing systems—which require fast modulation, low cost, and low power consumption—has resulted in the construction of many novel high-speed photonic devices. Electro-optical beam deflectors are ...
... In the past ten years, the growing need for optical switches, laser scanning, and highbandwidth signal processing systems—which require fast modulation, low cost, and low power consumption—has resulted in the construction of many novel high-speed photonic devices. Electro-optical beam deflectors are ...
Teledyne Semiconductor Fetron
... Using cascoded JFETs in combination with other elements, any number of different tube types can be simulated. The FETRON is most like a pentode in that the plate current is essentially independent of the plate to cathode voltage. The plate current of a triode, and i t s transconductance, are very mu ...
... Using cascoded JFETs in combination with other elements, any number of different tube types can be simulated. The FETRON is most like a pentode in that the plate current is essentially independent of the plate to cathode voltage. The plate current of a triode, and i t s transconductance, are very mu ...
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.