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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 91 for “"photomultiplier"”.
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Noise Processes in the Dynamic Crossed-Field Photomultiplier
Made available in DSpace on 2014-12-10T19:06:35Z (GMT). No. of bitstreams: 1 7105226.pdf: 2939623 bytes, checksum: e86a960560ab6ebe96f354ee9cbdf073 (MD5) Previous issue date: 1970
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A Demultiplexer for Use With the Dynamic Crossed-Field Photomultiplier
Made available in DSpace on 2014-12-12T20:54:13Z (GMT). No. of bitstreams: 1 7606674.pdf: 3916264 bytes, checksum: ef54eb7e45fc7b9987f11d8a4b066eec (MD5) Previous issue date: 1975
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A Dynamic Crossed-Field Photomultiplier With an Electron Bombarded Semiconductor Collector
Made available in DSpace on 2014-12-12T20:54:57Z (GMT). No. of bitstreams: 1 7913650.pdf: 2561244 bytes, checksum: e0ac0d89fd85a7e824b7042f051c4759 (MD5) Previous issue date: 1978
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An Investigation of Arrival Energy Distributions in the Dynamic Crossed-Field Photomultiplier
Made available in DSpace on 2014-12-12T20:54:15Z (GMT). No. of bitstreams: 1 7606892.pdf: 4609370 bytes, checksum: 4327b26d81bd1cb26e708d69fbf4fb4b (MD5) Previous issue date: 1975
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Photomultiplier tube calibration for the Cubic Meter Dark Matter Time Projection Chamber
This thesis concerns measurements I performed on photomultiplier tubes (PMTs) and lenses to be used in the Cubic Meter Dark Matter Time Projection Chamber (DMTPC) experiment. DMTPC is a new generation of detector, which takes the idea of a standard time projection chamber and adds in some …
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Magnetic Field Shielding For the Forward Time of Flight Upgrade At Jefferson National Lab
… Lab's 12GeV upgrade. The counters, consisting of photomultiplier tubes attached to the ends of scintillation bars of varying lengths, record the time of flight for particles inside the Continuous Electron Beam Accelerator Facility (CEBAF) Large Acceptance Spectrometer (CLAS). These detectors must …
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Dark noise calibration of the Super-Kamiokande outer detector
… used optic fibers to expose the detector's photomultiplier tubes to known amounts of light in order to determine the signal response to one photoelectron. This process was long and required data collection to halt during calibration. The new technique makes use of the background noise hits …
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The measurements of neutron and gamma dose rates in mixed radiation fields, using a liquid scintillation counter
… gamma sources, due to the dark current of the photomultiplier and the effect of the perturbation of the radiation field by the detector. An optical fibre bundle was used to couple an NE213 scintillator to a photomultiplier, in an attempt to minimise these effects. This produced an improvement …
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The use of chemiluminescence for detection of ignition, temperature, and fuel-to-air ratio of flames
… The use of a solid-state photodiode instead of a photomultiplier tube was investigated. Transient histories of the OH and CH signals were recorded by performing light-off ignition and intermittent ignition flame tests. These signal histories were compared to histories obtained using the original …
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The Gamma Intensity Monitor at the Crystal-Barrel-Experiment
… lepton pairs is measured with industrial photomultiplier tubes to provide an effective efficiency close to unity. Special bases were built for photomultiplier to ensure stable signal amplication even high count rates. Detailed descriptions of the GIM are provided to ensure that its inner …
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Development of the in vivo flow cytometer
… through a confocal slit aperture using a photomultiplier tube. The analog signal from the photomultiplier tube is then digitized, filtered, and recorded as a function of time onto a computer. Computer programs post- process the data for the presence of cell signal, as well as various …
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Development and characterization of a dual neutron and gamma detector
… system consists of a single crystal mounted on a photomultiplier tube to detect simultaneously gamma radiation as well as thermal neutrons. A compact data acquisition system has been used for neutron and gamma discrimination. The system has been tested with different gamma energies and with an …
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Analysis of vacuum and argon gas fill data from the MiniCLEAN dark matter experiment
… fluor tetraphenyl butadiene and cryogenic photomultiplier tubes for light detection. The active spherical region of the detector contains 500 kg of liquid argon at temperature 87 K. Background events which could mimic a WIMP signal are mitigated through pulse-shape discrimination and …
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A novel high-efficiency SiPM-based system for Ps-TOF
… Time Of Flight is proposed, using Silicon Photomultipliers (SiPMs) instead of Photomultiplier Tubes. The solution allows us to dramatically increase the compactness of the set up, thus improving the efficiency of 240%. Different configurations of SiPM+scintillators are characterized in …
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Characterizing Nanoparticle Size by Dynamic Light Scattering Technique (DLS)
… particles in a solution were measured by using a photomultiplier tube and analyzed to get the relaxation rates for decay of intensity correlations, which correspond to the diffusion constants pertaining to the motion of the particle. In the case of nanorods there are two types of motion - …
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Development of an Optical System for Measuring Fluorescence Lifetimes
… such as other avalanche photodiodes (APD) or photomultiplier tubes (PMTs).
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Diffusion in rare-gas liquids : an experimental study
… iodide crystal, a lucite light guide and a photomultiplier tube is used for this purpose. A temperature control method is incorporated which is capable of maintaining a set temperature to within ± 0.03 K in space and time. Modified equations for the diaphragm cell are derived for the case of …
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Diffusion in rare-gas liquids : an experimental study
… iodide crystal, a lucite light guide and a photomultiplier tube is used for this purpose. A temperature control method is incorporated which is capable of maintaining a set temperature to within ± 0.03 K in space and time. Modified equations for the diaphragm cell are derived for the case of …
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Optical method of recording electrical activity in isolated rabbit hearts
… is transmitted through the same fiber to a photomultiplier tube. Changes in fluorescence accompanying normal cardiac action potentials usually range from 1-5%. Substantive motion related signals accompany normal beating hearts, drowning out the actual signal that corresponds to change in …
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