The Experts below are selected from a list of 63888 Experts worldwide ranked by ideXlab platform
Edward A. Startsev - One of the best experts on this subject based on the ideXlab platform.
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Laser-Induced Fluorescence diagnostic of barium ion plasmas in the Paul Trap Simulator Experiment
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment, 2005Co-Authors: Moses Chung, Erik P. Gilson, Ronald C. Davidson, Philip C. Efthimion, Richard Majeski, Edward A. StartsevAbstract:The Paul Trap Simulator Experiment (PTSX) is a cylindrical Paul trap whose purpose is to simulate the nonlinear dynamics of intense charged particle beam propagation in alternating-gradient magnetic transport systems. To investigate the ion plasma microstate in PTSX, including the ion density profile and the ion velocity distribution function, a Laser-Induced Fluorescence diagnostic system is being developed as a nondestructive diagnostic. Instead of cesium, which has been used in the initial phase of the PTSX experiment, barium has been selected as the preferred ion for the Laser-Induced Fluorescence diagnostic. A feasibility study of the Laser-Induced Fluorescence diagnostic using barium ions is presented with the characterization of a tunable dye Laser. The installation of the barium ion source and the development of the Laser-Induced Fluorescence diagnostic system are also discussed.
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Laser-Induced Fluorescence diagnostic of barium ion plasmas in the Paul Trap Simulator Experiment
Nuclear Instruments and Methods in Physics Research Section A: Accelerators Spectrometers Detectors and Associated Equipment, 2005Co-Authors: Moses Chung, Erik P. Gilson, Ronald C. Davidson, Philip C. Efthimion, Richard Majeski, Edward A. StartsevAbstract:The Paul Trap Simulator Experiment (PTSX) is a cylindrical Paul trap whose purpose is to simulate the nonlinear dynamics of intense charged particle beam propagation in alternating-gradient magnetic transport systems. To investigate the ion plasma microstate in PTSX, including the ion density profile and the ion velocity distribution function, a Laser-Induced Fluorescence diagnostic system is being developed as a nondestructive diagnostic. Instead of cesium, which has been used in the initial phase of the PTSX experiment, barium has been selected as the preferred ion for the Laser-Induced Fluorescence diagnostic. A feasibility study of the Laser-Induced Fluorescence diagnostic using barium ions is presented with the characterization of a tunable dye Laser. The installation of the barium ion source and the development of the Laser-Induced Fluorescence diagnostic system are also discussed. (c) 2005 Elsevier B.V. All rights reservedclose2
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Development of Laser-Induced Fluorescence Diagnostic for the Paul Trap Simulator Experiment
Proceedings of the 2005 Particle Accelerator Conference, 1Co-Authors: Moses Chung, Erik P. Gilson, Ronald C. Davidson, Philip C. Efthimion, Richard Majeski, Edward A. StartsevAbstract:The Paul Trap Simulator Experiment (PTSX) is a cylindrical Paul trap whose purpose is to simulate the nonlinear dynamics of intense charged particle beam propagation in alternating-gradient magnetic transport systems. For the insitu measurement of the transverse ion density profile in the PTSX device, which is essential for the study of beam mismatch and halo particle production, a Laser-Induced Fluorescence diagnostic system is being developed. Instead of cesium, which has been used in the initial phase of the PTSX experiments, barium has been selected as the preferred ion for the Laser-Induced Fluorescence diagnostic. The installation of the barium ion source and the characterization of the tunable dye Laser system are discussed. The design of the collection optics with an intensified CCD camera system is also discussed. Finally, initial test results using the Laser-Induced Fluorescence diagnostic are presented.
Douglas P Hart - One of the best experts on this subject based on the ideXlab platform.
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emission reabsorption Laser Induced Fluorescence erlif film thickness measurement
Measurement Science and Technology, 2001Co-Authors: Carlos Hidrovo, Douglas P HartAbstract:This paper presents a unique optical technique that utilizes the reabsorption and emission of two fluorescent dyes to accurately measure film thickness while minimizing errors caused by variations in illumination intensity and surface reflectivity. Combinations of dyes are selected that exhibit a high degree of emission reabsorption and each dye concentration is adjusted to create an optically thick system where emission reabsorption is intrinsic to the Fluorescence of the film being measured. Film thickness information as well as excitation and dye response characteristics are all imbedded in the emission intensities of the dyes. Errors normally associated with Laser Induced Fluorescence based film thickness measurements, including those due to optical distortion, variations in surface reflectivity and excitation non-uniformities, are minimized by observing the ratio of the dye emissions. The principle and constitutive equations characterizing emission reabsorption Laser Induced Fluorescence (ERLIF) film thickness measurement are presented. In addition, film thickness measurements from 5 to 400 µm with 1% accuracy are demonstrated.
Norman S. Nishioka - One of the best experts on this subject based on the ideXlab platform.
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Laser-Induced Fluorescence spectroscopy.
Gastrointestinal Endoscopy Clinics of North America, 1994Co-Authors: Norman S. NishiokaAbstract:Lasers have been a part of medicine and surgery since the late 1960s. In the past 5 years, however, there has been growing interest in using Lasers as diagnostic devices, an area of research that has been termed optical diagnostics. Optical diagnostic techniques seek to provide diagnostic information about tissue by using light in a probing, yet nondestructive fashion. A large number of optical methods are available to endoscopists, but to date, only Laser-Induced Fluorescence has been investigated in any detail.
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Ultraviolet Laser-Induced Fluorescence of colonic polyps.
Gastroenterology, 1992Co-Authors: Kevin T. Schomacker, Joan K. Frisoli, Carolyn C. Compton, Thomas J. Flotte, James M. Richter, Thomas F. Deutsch, Norman S. NishiokaAbstract:Ultraviolet Laser-Induced Fluorescence was examined in vivo to determine whether the technique can reliably distinguish between hyperplastic and adenomatous polyps of the colon. Spectra from 86 normal colonic sites, 35 hyperplastic polyps, and 49 adenomatous polyps were recorded in vivo. Polyp type was independently determined by two senior pathologists who were unaware of the Fluorescence measurement. A multivariate linear regression analysis was used to differentiate spectra from hyperplastic and adenomatous polyps and resulted in a sensitivity, specificity, predictive value positive, and predictive value negative for identifying adenomatous polyps of 86%, 80%, 86%, and 80%, respectively. These values were not significantly different from the accuracy of routine clinical pathology. Thus, ultraviolet Laser-Induced Fluorescence appears to show promise as a means for distinguishing tissue types. However, further experience is needed before its routine clinical use can be recommended. Significant changes in the Fluorescence spectra occurred postmortem, suggesting that future studies of Laser-Induced Fluorescence of colonic tissue must use data acquired in vivo.
Viktor Gorodnichev - One of the best experts on this subject based on the ideXlab platform.
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Experimental studies of Laser-Induced Fluorescence spectra of plants under man-made soil pollution
25th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 2019Co-Authors: Yu. V. Fedotov, M. L. Belov, D. A. Kravtsov, Antonina A. Cherpakova, Viktor GorodnichevAbstract:We have experimentally studied Laser-Induced Fluorescence spectra of plants under man-made soil pollution at the Fluorescence excitation wavelength of 355 nm. The paper describes a laboratory setup, presents measurement data of Laser-Induced Fluorescence spectra of plants in the normal condition and under stress caused by man-made soil pollution and shows that the man-made soil pollution has a strong impact on the Laser-Induced Fluorescence spectrum of plants.
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Experimental Investigation of the Dynamics in Laser-Induced Fluorescence Spectra of Oil Pollution
Herald of the Bauman Moscow State Technical University. Series Natural Sciences, 2019Co-Authors: Yu. V. Fedotov, M. L. Belov, D. A. Kravtsov, Viktor GorodnichevAbstract:The paper concerns experimental investigation of the dynamics in Laser-Induced Fluorescence spectra emitted by various types of oil pollution (light and heavy petroleum distillates, crude oil) on the earth surface, using an eye-safe 0.355 µm Fluorescence induction wavelength. We show that in terms of time, the signal of Laser-Induced Fluorescence generated by oil pollution on the earth surface diminishes more slowly than that generated on the water surface in the same circumstances. However, even though the signal of Laser-Induced Fluorescence on the earth surface (after oil pollution) takes more time to diminish, in a few hours or days after oil spillage (depending on the type of petroleum product) the signal of Laser-Induced Fluorescence generated by oil pollution becomes comparable to that of natural objects (such as various vegetation types) on the earth surface
Moses Chung - One of the best experts on this subject based on the ideXlab platform.
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Laser-Induced Fluorescence diagnostic of barium ion plasmas in the Paul Trap Simulator Experiment
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment, 2005Co-Authors: Moses Chung, Erik P. Gilson, Ronald C. Davidson, Philip C. Efthimion, Richard Majeski, Edward A. StartsevAbstract:The Paul Trap Simulator Experiment (PTSX) is a cylindrical Paul trap whose purpose is to simulate the nonlinear dynamics of intense charged particle beam propagation in alternating-gradient magnetic transport systems. To investigate the ion plasma microstate in PTSX, including the ion density profile and the ion velocity distribution function, a Laser-Induced Fluorescence diagnostic system is being developed as a nondestructive diagnostic. Instead of cesium, which has been used in the initial phase of the PTSX experiment, barium has been selected as the preferred ion for the Laser-Induced Fluorescence diagnostic. A feasibility study of the Laser-Induced Fluorescence diagnostic using barium ions is presented with the characterization of a tunable dye Laser. The installation of the barium ion source and the development of the Laser-Induced Fluorescence diagnostic system are also discussed.
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Laser-Induced Fluorescence diagnostic of barium ion plasmas in the Paul Trap Simulator Experiment
Nuclear Instruments and Methods in Physics Research Section A: Accelerators Spectrometers Detectors and Associated Equipment, 2005Co-Authors: Moses Chung, Erik P. Gilson, Ronald C. Davidson, Philip C. Efthimion, Richard Majeski, Edward A. StartsevAbstract:The Paul Trap Simulator Experiment (PTSX) is a cylindrical Paul trap whose purpose is to simulate the nonlinear dynamics of intense charged particle beam propagation in alternating-gradient magnetic transport systems. To investigate the ion plasma microstate in PTSX, including the ion density profile and the ion velocity distribution function, a Laser-Induced Fluorescence diagnostic system is being developed as a nondestructive diagnostic. Instead of cesium, which has been used in the initial phase of the PTSX experiment, barium has been selected as the preferred ion for the Laser-Induced Fluorescence diagnostic. A feasibility study of the Laser-Induced Fluorescence diagnostic using barium ions is presented with the characterization of a tunable dye Laser. The installation of the barium ion source and the development of the Laser-Induced Fluorescence diagnostic system are also discussed. (c) 2005 Elsevier B.V. All rights reservedclose2
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Development of Laser-Induced Fluorescence Diagnostic for the Paul Trap Simulator Experiment
Proceedings of the 2005 Particle Accelerator Conference, 1Co-Authors: Moses Chung, Erik P. Gilson, Ronald C. Davidson, Philip C. Efthimion, Richard Majeski, Edward A. StartsevAbstract:The Paul Trap Simulator Experiment (PTSX) is a cylindrical Paul trap whose purpose is to simulate the nonlinear dynamics of intense charged particle beam propagation in alternating-gradient magnetic transport systems. For the insitu measurement of the transverse ion density profile in the PTSX device, which is essential for the study of beam mismatch and halo particle production, a Laser-Induced Fluorescence diagnostic system is being developed. Instead of cesium, which has been used in the initial phase of the PTSX experiments, barium has been selected as the preferred ion for the Laser-Induced Fluorescence diagnostic. The installation of the barium ion source and the characterization of the tunable dye Laser system are discussed. The design of the collection optics with an intensified CCD camera system is also discussed. Finally, initial test results using the Laser-Induced Fluorescence diagnostic are presented.
