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.
Results
Showing 1 to 20 of 24 for “"Charge coupled devices"”.
-
Impact Ionization in Charge Coupled Devices
A charge coupled device was designed and fabricated for the purpose of measuring impact ionization at the silicon-silicon dioxide interface. All past experiments have measured impact ionization either totally or partly in the bulk. Since the mobility of holes and electrons is lower at the interface …
-
Avalanche gain in charge-coupled devices
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1986.
-
Radiation damage effects in charge coupled devices
… radiation on the operation of EEV buried channel charge coupled devices (CCDs) have been studied. This work was instigated by the need to qualify CCDs for the SLD vertex detector. However, the work is also relevant to other small signal, low noise applications. The results of the batch …
-
Two-dimensional transient analysis of buried-channel charge-coupled devices
<p>Since the invention of charge-coupled device (CCD) by W. S. Boyle and G. E. Smith in 1970, this device has drawn tremendous attention. CCD is considered as an important milestone in the electronic industry;In 1972, a new structure of CCD, called buried-channel charge-coupled device (BCCD) was …
-
Long and short term effects of X-rays on charge coupled devices
EEV buried channel charge coupled devices (BC CDs) with technological variations have been studied with respect to their response to 70kVp X-rays. Process variations considered are the conventional BCCD, scintillator coated BCCDs ( (Gadox(Eu) and Csl(Tl)) and the inversion mode device. The work was …
-
Growth, Characterization and Application of Aluminum-Gallium - Arsenide/gallium-Arsenide Modulation Doped Heterostructures
… basis of a new family of high speed electronic devices, including photodetectors, charge-coupled devices and field effect transistors. This has motivated an extensive study of the growth and physical properties of Al(,x)Ga(,1-x)As/GaAs heterostructures. Molecular beam epitaxy is the preferred …
-
Cosmic-ray interactions in charged-couple devices in the DMTPC 4-shooter detector
… explores cosmic ray interactions with the four charge-coupled devices (CCDs) of the 4-shooter detector, the largest existing prototype detector in the DMTPC project, by looking at surface runs at MIT with detector voltages off. Through this, the depth of the depletion region of each CCD is …
-
Energetic interactions within the solid-state spectrometer of the ASCA Satellite
… which photoelectronic interactions occur in the Charge Coupled Devices (CCDs) of the Solid-State Imaging Spectrometer (SIS) on ASCA reveals a sudden variation in the nearly linear CCD signal output versus energy input curve near the silicon K-edge. The focus of this thesis is the modeling of the …
-
A near-optimal wavelet-based estimation technique for video sequences
… used in creating video sequences are often charge-coupled devices, which produce data by way of a counting process, leading to noise with a Poisson distribution. Because many applications using video require data with less noise, a method of reducing the noise and estimating the original …
-
Charge-coupled device optimizations for astronomy.
In the past decade, charge-coupled devices (CCDs) have rapidly become the astronomical imaging detector of choice for the visible and near-IR spectral regions. There are, however, several problems which have greatly reduced the availability of sufficient quality CCDs to the astronomical community. …
-
A CCD based curvature wavefront sensor for Adaptive Optics in Astronomy
… Fortschritten in der Herstellungstechnologie von Charge Coupled Devices (CCDs) entwickelten wir ein spezielles CCD und untersuchten dessen Leistungsfähigkeit für ein 60 Element Curvature AO System, das mit sehr schwachen Lichtsignalen arbeitet. Hier wurde erstmals ein CCD als Wellenfrontsensor …
-
Aumento de la velocidad de lectura de sensores de imágenes con múltiples mediciones no destructivas y ruido sub-electrónico
Los Charge Coupled Devices (CCDs) son sensores de imágenes que poseen bajo ruido de lectura y gran rango dinámico. La astronomía es uno de sus principales campos de aplicación, donde se usan en el rango de luz visible y en el infrarrojo cercano. Se puede combinar esta tecnología con una etapa de …
-
X-ray astronomy with CCDs : calibration of the advanced CCD imaging spectrometer and observations of rotation-powered pulsars
This dissertation concerns the use of charge coupled devices (CCDs) for X-ray astronomy. Part I of this thesis focuses on the calibration of the Advanced CCD Imaging Spectrometer (ACIS), one of the two primary focal plane instruments on the Chandra X-ray Observatory. I begin by presenting a series …
-
Micrometeroid, orbital debris, and shielding analysis for the Soft X-ray Camera (SXC) of the High Energy Transient Explorer (HETE-2) spacecraft
… board the HETE-2 spacecraft and uses a pair of Charge Coupled Devices (CCDs) to detect incoming X-ray in the 0.5-14 keV energy range. Once in Earth orbit, HETE-2 will encounter micrometeoroids and orbital debris. Micrometeoroids are the smallest natural particles in space and orbital debris are …
-
Precision CCD photometry of globular clusters
… is made of the photometric applications of charge coupled devices, giving particular attention to the aquisition and analysis of crowded field CCD images within globular clusters. Digital photometric techniques are discussed, including analytic profile fitting to stellar images. The major …
-
Optical Enhancement in Periodic Plasmonic Gratings for SERS and Metal-Semiconductor-Metal Photodetectors (MSM-PDs) Applications
… photo-detectors solar cells, imaging sensors, charge-coupled devices (CCD), and optical-fiber communication systems. Several parameters, wire widths and thickness, gap space, taper angle, and the incident wavelength and angle, were investigated. The goal of this research is to utilize the …
-
Mechanical design, calibration, and environmental protection of the REXIS DAM
… pass through the mask strike an array of four charge-coupled devices (CCDs) that detect the incident photon energy and location on the imaging array. A spatial map of selected elemental abundances on Bennu is constructed by cross-correlating the mask pattern with the collected data. The CCDs …
-
Pixellated radiation detectors for scientific applications
… last four decades allowed MAPS to compete with Charge-Coupled Devices (CCD) in many applications. The technology also provides relatively inexpensive ways to tailor design to suit specific application needs. It is important to understand performance capabilities of new sensor designs through …
Page 1 of 2