The Experts below are selected from a list of 24 Experts worldwide ranked by ideXlab platform
Christian Lotto - One of the best experts on this subject based on the ideXlab platform.
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Energy-Sensitive Single-Photon X-ray and Particle Imaging
Springer Series in Optical Sciences, 2020Co-Authors: Christian LottoAbstract:Energy-sensitive detectors perform asynchronous arrival detection of single X-Ray photons and Particles. Their ability of measuring the detected Particles’ energy improves the performance of the Particle counting applications and enables spectroscopic applications. In such detectors, either a semiconductor layer for direct conversion or a combination of a scintillator and a semiconductor sensing device for visible photons is used for generation of an electrical charge pulse per Absorbed Particle. This charge amount, which represents the Particle energy, is detected by an asynchronous charge pulse detecting circuit. The noise of such circuits defines the lowest discrimination threshold of counting systems and the energy resolution of spectroscopic applications. Therefore, low noise, low power consumption, and low area are requirements for charge pulse detecting circuits used in segmented energy sensitive Particle detectors with a high number of pixels. Choice of a sensing device, definition of the charge pulse detecting circuit’s topology, and analysis of interdependences amongst the above performance parameters are covered and a context with employed readout schemes, processing circuits, and target applications is established in this chapter. Energy-sensitive detectors perform asynchronous arrival detection of single X-Ray photons and Particles. Their ability of measuring the detected Particles’ energy improves the performance of the Particle counting applications and enables spectroscopic applications. In such detectors, either a semiconductor layer for direct conversion or a combination of a scintillator and a semiconductor sensing device for visible photons is used for generation of an electrical charge pulse per Absorbed Particle. This charge amount, which represents the Particle energy, is detected by an asynchronous charge pulse detecting circuit. The noise of such circuits defines the lowest discrimination threshold of counting systems and the energy resolution of spectroscopic applications. Therefore, low noise, low power consumption, and low area are requirements for charge pulse detecting circuits used in segmented energy sensitive Particle detectors with a high number of pixels. Choice of a sensing device, definition of the charge pulse detecting circuit’s topology, and analysis of interdependences amongst the above performance parameters are covered and a context with employed readout schemes, processing circuits and target applications is established in this chapter.
Feng Ya - One of the best experts on this subject based on the ideXlab platform.
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Theoretical Study of Character of SARS Virus Particle in Air Dynamics
Journal of Shangqiu Vocational and Technical College, 2020Co-Authors: Feng YaAbstract:SARS virus is a kind of superfine Particle essentially. The character of temperature and time and Particle diameter and humidity and adsorption and so on may be obtained from air dynamics when this fine Particle is as Absorbed Particle. They can be calculated and analyzed by existing formula, and lay on quantization basis for calculation of SARS virus Particle. When study of virology mechanics of SARS virus is not very clear , we can offer corresponding method freely with air dynamics character and have direction for our corresponding experiment study.
Matthias Buehler - One of the best experts on this subject based on the ideXlab platform.
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Detection of single Particles and quanta with a cryogenic calorimeter of high mass
EUV X-Ray and Gamma-Ray Instrumentation for Astronomy III, 1992Co-Authors: Edgar Umlauf, Matthias BuehlerAbstract:ABSTRACT A status report is given on the development of a cryogenic Particle detector. The elementary excitations are transitions between the two states of a Kramers doublet with a Zeeman splitting of the order of iO eV. Results are given for acompound detector with a mass of 120 grams. The baseline energy resolution is 8 eV rms I s/Hz, and it is shown that this resolution could be achieved with a very high absorber mass too. The signal rise time depends strongly on temperature, withthe shortest signals found at the lowest temperature (35 ms at 30 mK). In addition a much shorter signal with 1 ma rise timecan be superposed. 1. INTRODUCTIONDifferent kinds of cryogenic detectors have been developed in recent years by various groups1 , in order to achieve higher energy-resolution compared with conventional detectors. We want to consider only the bolometers where the energyof an Absorbed Particle becomes thermalized and the resulting increase of temperature, depending on the heat capacity of the
Edgar Umlauf - One of the best experts on this subject based on the ideXlab platform.
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Detection of single Particles and quanta with a cryogenic calorimeter of high mass
EUV X-Ray and Gamma-Ray Instrumentation for Astronomy III, 1992Co-Authors: Edgar Umlauf, Matthias BuehlerAbstract:ABSTRACT A status report is given on the development of a cryogenic Particle detector. The elementary excitations are transitions between the two states of a Kramers doublet with a Zeeman splitting of the order of iO eV. Results are given for acompound detector with a mass of 120 grams. The baseline energy resolution is 8 eV rms I s/Hz, and it is shown that this resolution could be achieved with a very high absorber mass too. The signal rise time depends strongly on temperature, withthe shortest signals found at the lowest temperature (35 ms at 30 mK). In addition a much shorter signal with 1 ma rise timecan be superposed. 1. INTRODUCTIONDifferent kinds of cryogenic detectors have been developed in recent years by various groups1 , in order to achieve higher energy-resolution compared with conventional detectors. We want to consider only the bolometers where the energyof an Absorbed Particle becomes thermalized and the resulting increase of temperature, depending on the heat capacity of the
Joan Ramon Morante - One of the best experts on this subject based on the ideXlab platform.
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Catalyst size limitation in vapor–liquid–solid ZnO nanowire growth using pulsed laser deposition
Thin Solid Films, 2012Co-Authors: A. Marcu, L. Trupina, Reza R. Zamani, Jordi Arbiol, C. Grigoriu, Joan Ramon MoranteAbstract:Abstract Using a pulsed laser deposition system in a plane reflector configuration, we have grown single crystal ZnO nanowires using different gold catalyst quantities and different local Particle fluxes. The number of ZnO nanowire over the square micrometer substrate surface proved to depend on both gold quantity and Particle flux, in specific conditions. If for a “low Particle flux” the nanowire density seems to strongly depend on the gold quantity, for a “high Particle flux”, the dependence is no longer observable. The results were interpreted in terms of the catalyst Absorbed Particle concentration dependence on the catalyst droplet size and incident Particle flux.
