Global ETD Search
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 185 for “"Time Resolution"”.
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Development of a new silicon pixel detector with 10 ps time resolution for high luminosity future experiments
… of the characterizations of the 3D-trench TimeSPOT silicon sensors with minimum ionizing particles are described. Such devices have been developed to satisfy the requirements of the LHCb VErtex LOcator detector for the Upgrade II, planned to face the high luminosity conditions. These …
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Avalanches in plastic deformation: maximum velocity statistics, finite temperature effects, and analysis of low time resolution data
… the simple mean-field model and a continuous time model called the ABBM model, originally proposed as a phenomenological model of Barkhausen noise in magnets. The relationship is formally valid for ductile materials without significant weakening, but the results of our calculations are …
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Timing performance of FBK Silicon Photomultipliers for biomedical applications: ultimate time resolution and analysis of the avalanche build-up
L'abstract è presente nell'allegato / the abstract is in the attachment
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Design, construction and commissioning of an apparatus to perform frequency response diffusivity measurements and high time-resolution ftir spectroscopy
… frequency volume modulation), special high time-resolution methods (i.e. rapid- and step-scan) can be used. With these techniques, very rapid molecular processes can be probed.The objective of this study was to design, construct and commission an apparatus capable of measuring diffusivities …
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Spectral dynamics of single quantum dots : a study using photon-correlation Fourier spectroscopy for submillisecond time resolution at low temperature and in solution
… fluorescence spectroscopy is limited in temporal resolution by the need to collect enough photons to measure a spectrum, in frequency resolution by the dispersing power of the spectrometer, and by environmental conditions by the need to immobilize the chromophore on a substrate. In this thesis, we …
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Improved observational programs for the Arecibo ionospheric observatory
… densities, temperatures and composition with a time resolution of 25 min. at low altitudes and 1 and one-fourth hrs. at high altitudes. The other program will measure number densities, temperatures, and photo-electron fluxes in the 250-500 km region (i.e., pure 0+ region) with a time resolution …
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Innovative silicon pixel sensors for a 4D VErtex LOcator detector for the LHCb high luminosity upgrade
… a new 4D vertex detector capable to measure the time information of the tracks by using pixel sensors with an accurate spatial and time resolution for the particles detection. This set the stage for the development of innovative pixel sensors with unmatched time resolution of the order of tens …
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Optical and X-ray studies of newly discovered flare stars
… surveys. During a total photometric monitoring time of 121 hrs on 6 new stars, there were 54 separate optical flares recorded, including a dramatic AU = 3.8 mag flare, emitting an energy in the U-band of Eu lx 10 erg. Three other flares had AU > 2.2 mag. The flaring rate of two of these new …
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Dynamic environmental transmission electron microscopy
… first of its kind, combining the power of high-resolution electron imaging and diffraction of TEM, the time resolution provided by pulsed laser, and the in-situ capabilities of environmental transmission electron microscopy (ETEM) while also providing fast imaging capability using a CMOS pixel …
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A hierarchy of microgrid models with some applications
… The microgrid models are classified according to time resolution and, consequently, according to complexity and computational cost as well. Our approach involves three key stages: (1) the formulation of high-order models, using existing circuit and control laws in the literature, followed by (2) a …
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Performance of hybrid photon detectors and studies of two-body hadronic B decays at LHCb
… A method to measure the detector proper time resolution for two-body hadronic B decays from data, making use of the per-event proper time error, is described. A proper time resolution model is proposed and is shown to accurately match the simulated resolution for these decays. The model …
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Halogen Oxide Studies in the Boundary Layer by Multi Axis Differential Optical Absorption Spectroscopy and Active Longpath-DOAS
… losses due to BrO and allowed for the first time to study the day and nighttime chemistry of BrO at high time resolution. Molecular bromine was inferred to be a major reservoir compound during the night, initiating sunrise ozone destruction upon photolysis. The first simultaneous measurements …
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Fourier transform infrared difference spectroscopy of bacteriorhodopsin
… the entire midinfrared region and has a maximum time resolution of 40 ps. This time resolution has not yet been achieved. Preliminary data taken with this device are presented.
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Effects of muscle contractions on biceps brachii oxygenation investigated by near-infrared spectroscopy
… oxidative metabolism during exercise at a high time resolution. However, limited studies have used NIRS to compare oxidative metabolic responses of the biceps brachii during lengthening (eccentric), shortening (concentric) and static (isometric) voluntary contractions, and electrically evoked …
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Picosecond Time-Resolved Studies of IVR: Theory and Applications of Time-Resolved Fluorescence Depletion
Time resolved fluorescence depletion (TRFD), a new technique for the study of intramolecular vibrational redistribution, is described. Picosecond time resolution is obtained through the application of picosecond laser pump-probe techniques. A time dependent perturbation theory based description of …
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X -Ray Diffraction Rotational Microrheology
… the rotational motion of single crystals to a resolution of 80murad with a time resolution of 0.02 seconds. Rotational microrheology studies of single crystal Alumina tracer particles suspended in liquid decanoic acid show subdiffusive behavior transitioning towards diffusive behavior with a …
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Laser-coupled scanning tunneling microscopy and spectroscopy of quantum materials and qubit defects
… materials simultaneously at their intrinsic timescales and lengthscales has remained a long-sought goal in condensed matter physics. Laser-coupled scanning tunneling microscopy has provided a possible means to achieve this goal. However, to date, laser-coupled STM on quantum materials has …
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Sub-nanosecond Cherenkov photon detection for LHCb particle identification in high-occupancy conditions and semiconductor tracking for muon scattering tomography
… this effect, the use of photon detector hit time information is presented in the context of the Ring-Imaging Cherenkov (RICH) detectors. The application of a time gate in the FPGA of the digital readout board for the Upgrade Ia photon detector, which is being installed for LHC Run 3, is …
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ULTRAFAST DYNAMICS IN NITRO- AND (ORGANOPHOSPHINE)GOLD(I)-POLYCYCLIC AROMATIC HYDROCARBONS
… absorption with femtosecond (10<sup>-15</sup> s) time resolution, steady-state Xe-lamp irradiation, UV/Vis spectroscopy and HPLC methods. Ground- and excited-state calculations were performed to help interpret the experimental results. Two types of PAH derivatives were chosen for this research: …
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