نتایج جستجو برای: ray generator
تعداد نتایج: 344877 فیلتر نتایج به سال:
OBJECTIVE To describe the main features of a prototype panoramic X-ray machine modified for photofluorography. METHODS The prototype PTM 2001 (Asahi Roentgen, Kyoto, Japan) consists of a conventional panoramic machine with a modified X-ray generator and incorporating a 9-inch image intensifier and a photofluorographic camera. RESULTS The photofluorographic panoramic radiograph is reduced in...
The small-molecule topology generator PRODRG is described, which takes input from existing coordinates or various two-dimensional formats and automatically generates coordinates and molecular topologies suitable for X-ray refinement of protein-ligand complexes. Test results are described for automatic generation of topologies followed by energy minimization for a subset of compounds from the Ca...
[1] We present a detailed investigation of X-ray emission from long laboratory sparks in air at atmospheric pressure. We studied 231 sparks of both polarities using a 1-MV Marx generator with gap lengths ranging from 10 to 140 cm. The X rays generated by the discharges were measured using five NaI/PMT detectors plus one plastic scintillator/PMT detector, all enclosed in 0.32-cm-thick aluminum b...
In this research program, modern x-ray scattering techniques are used to study structures and phase transitions in thin films and on surfaces. We have two principal experimental facilities. At MIT, we have four high-resolution computer-controlled x-ray spectrometers with high intensity rotating anode x-ray generators. The angular resolution can be made as fine as 1.8 seconds of arc, enabling us...
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