نتایج جستجو برای: ultraviolet detector
تعداد نتایج: 98559 فیلتر نتایج به سال:
Amorphous-selenium (a-Se) based photodetectors are promising candidates for imaging devices, due to their high spatial resolution and response speed, as well as extremely high sensitivity enhanced by an internal carrier multiplication. In addition, a-Se is reported to show sensitivity against wide variety of wavelengths, including visible, UV and X-ray, where a-Se based flat-panel X-ray detecto...
We demonstrate a compact system, incorporating a 32-element linear array of ultraviolet (290 nm and 340 nm) light-emitting diodes (LEDs) and a multi-anode photomultiplier tube, to the in-flight fluorescence detection of aerosolized particles, here containing the biological molecules tryptophan and NADH. This system illustrates substantial advances in the growth and fabrication of new semiconduc...
We have developed a centrifugal minidisc module, which extends the versatility of the centrifugal analyzer system with respect to radiation sources, wavelength selectors, radiation detectors, and the analysis performed by the system. The motor, brake, power supply, and control circuitry for the sample/reagent minidisc unit has been repackaged in a compact module, which is easily attached to an ...
In a previous communication [l] we reported a procedure for the serum determination of midazolam using gas chromatography (GC) with a nitrogenselective detector. GC with nitrogen-selective detection resulted in a selective procedure for the direct determination of midaxolam with a sensitivity of 50 ng/ml. We present, in this paper, a procedure for the direct determination of midazolam and its m...
A compact vacuum ultraviolet spectrometer system has been developed to provide time-resolved impurity spectra from tokamak plasmas. Two interchangeable aberration-corrected toroidal diffraction gratings with flat focal fields provide simultaneous coverage over the ranges 100-1100 A or 160-1700 A. The detector is an intensified self-scanning photodiode array. Spectral resolution is 2 A with the ...
There has been significant progress over the last few years in the development of technologies for microchannel plate (MCP) imaging detectors in the ultraviolet. The nominal configuration of this type of detector consists of a photocathode to convert incoming radiation to photoelectrons, MCP’s to amplify the signals, followed by either an optical or electronic image readout scheme. Areas where ...
Nanorods (NRs) of crystalline ZnO coated with thin layers TiO$_2$(ZnO@TiO$_2$) were fabricated the help spin coating technique followed by hydrothermal method. Scanning electron microscopy (SEM) and X-ray diffraction analysis confirms morphology structural stability as-prepared NRs. The optical band gaps NRs estimated, a clear blue shift toward UV region has been detected. When light falls on d...
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