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Dissertations / Theses on the topic 'Ultra-high vacuum system development'

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Published: 4 June 2021
Last updated: 1 February 2022

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1

Magnano, Graziano. "Elestrospray deposition in ultra-high vacuum : the development of a deposition system for non-volatile molecules." Thesis, University of Nottingham, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.546586.

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2

Lin, Wenzhi. "Growth and Scanning Tunneling Microscopy Studies of Magnetic Films on Semiconductors and Development of Molecular Beam Epitaxy/Pulsed Laser Deposition and Cryogenic Spin-Polarized Scanning Tunneling Microscopy System." Ohio University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1304610814.

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3

Woodburn, Charles N. "Development of low-temperature, ultra high vacuum, scanning tunnelling microscope." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.264506.

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4

KURIMOTO, Shinji, Kenji HIROTA, Daisuke TOKUMOTO, and Toshihiko MORI. "Improving High Precision and Continuous Process of Ultra-Fine Piercing by SiC Fiber Punch." The Japan Society of Mechanical Engineers, 2004. http://hdl.handle.net/2237/9036.

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5

Van, Eeden Hendrik Lodewyk. "Development of an ultra-high radio-frequency identification system / Hendrik Lodewyk van Eeden." Thesis, North-West University, 2004. http://hdl.handle.net/10394/625.

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Ultra-high radio-frequency identification (UHF RFID) systems outperform all other RFID technologies in terms of throughput and reading range. UHF RFID tags and readers will be deployed on unprecedented scales during the next few years. This could result in problems of inter-operability and large-scale interference from readers. This thesis describes the systematic analysis of optimal requirements and the systematic derivation of a set of design objectives and guidelines for a UHF RFID system and air protocol that differs from other UHF RFID systems in use today. In brief, this is a system wher
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6

Swady, Raad A. "Development of vacuum technologies for the preparation of high-purity thin films in simple systems." Thesis, Loughborough University, 1992. https://dspace.lboro.ac.uk/2134/10590.

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It has been demonstrated that reactive magnetron sputtering can be controlled in low pumping speed vacuum system through observation of the spectral line emission by the plasma emission monitor (PEM). Confining the deposition process in an enclosed volume has provided the gettering-pumping action needed to deposit films with good quality reducing the active contamination that low pumping vacuum system suffers. TiN films of specular quality has been optimised by observing the emission line of the sputtered titanium. It was shown that optimum TiN film is formed when the consumption of nitrogen f
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7

Amir, Sayyafi Ehssan. "Development of a Lightweight Hurricane-Resistant Roof System." FIU Digital Commons, 2017. http://digitalcommons.fiu.edu/etd/3364.

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Roofs are the most vulnerable part of the building envelope that often get damaged when subjected to hurricane winds. Damage to the roofs has a devastating impact on the entire structure, including interior losses and service interruptions. This study aimed at the development of a novel light-weight composite flat roof system for industrial, commercial and multi-story residential buildings to withstand Category 5 hurricane wind effects based on the Florida Building Code requirements for hurricane-prone regions, the strictest wind design code in the United States. The proposed roof system is de
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8

Schäfer-Nolte, Eike Oliver [Verfasser], and Jörg [Akademischer Betreuer] Wrachtrup. "Development of a diamond-based scanning probe spin sensor operating at low temperature in ultra high vacuum / Eike Oliver Schäfer-Nolte. Betreuer: Jörg Wrachtrup." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2014. http://d-nb.info/1052894151/34.

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9

Deshpande, Aparna. "Atomistic interactions in STM atom manipulation." Ohio : Ohio University, 2007. http://www.ohiolink.edu/etd/view.cgi?ohiou169849272.

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10

Gouttenoire, Vincent. "Exploitation de nouveaux phénomènes dans les systèmes nanoélectromécaniques : réalisation d'un nanorésonateur accordable." Phd thesis, Université Claude Bernard - Lyon I, 2009. http://tel.archives-ouvertes.fr/tel-00552278.

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Ce travail de thèse porte sur l'étude de nouveaux phénomènes vibratoires dans les systèmes Nano-électromécaniques (NEMS) conçus à partir de nanofils (NFs) SiC ou de nanotubes de carbone (NCs) résonants. La configuration encastré-libre permet d'effectuer l'émission de champ (EC) pour caractériser nos échantillons et notamment mesurer le module de Young et le facteur de qualité (Q) de nos NEMS. Le chauffage du résonateur permet d'accroître fortement la valeur de Q des nanofils SiC (Qmax = 159 000). Les auto-oscillations observées sous EC sont obtenues seulement par l'application d'une tension co
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11

Terschlüsen, Joachim A. "Constructing and Commissioning HELIOS – A High Harmonic Generation Source for Pump-Probe Measurements with sub 50 fs Temporal Resolution : The Development of Experimental Equipment for Extreme Ultraviolet Spectroscopy." Doctoral thesis, Uppsala universitet, Molekyl- och kondenserade materiens fysik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-281298.

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This thesis presents HELIOS, an in-house laboratory for time-resolved pump-probe spectroscopy with extreme-ultraviolet (XUV) probe radiation. A wide span of pump wavelengths can be generated using commercial laser equipment while XUV probe radiation is generated via a high harmonic generation process in a noble gas delivering probe photons with energies between 20 eV and 72 eV. The XUV beam path features a time-preserving monochromator and was constructed and built in-house. HELIOS features an overall time resolution of about 50 fs when using 800 nm pump and 41 eV probe photons. An energy reso
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12

El, Jawad Mohammad. "Développement d'une chambre de transfert entre l'ultra-haut vide et le milieu électrolytique : application à des surfaces Pt / W (111) nanostructurées." Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00591806.

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Nous avons développé un système de transfert des surfaces monocristallines préparées sous ultra-haut vide (UHV) vers un milieu électrolytique pour effectuer des mesures voltampérométriques. Ce système original très compact comprend une valise sous vide et une cellule électrochimique dédiée. Le système a été testé avec succès sur des surfaces monocristallines de platine, en particulier la surface Pt(111) très sensible à la qualité de la préparation sous UHV. Puis nous avons utilisé ce système pour caractériser les propriétés électrochimiques du système Pt/W(111) avec d'une part l'effet des cont
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13

XU, YAN-ZHEN, and 徐衍珍. "Design an implementation of microcomputer-based ultra high vacuum monitoring system." Thesis, 1987. http://ndltd.ncl.edu.tw/handle/55137916000101595782.

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14

Chen, Tzu-Yang, and 陳子揚. "Pump Down Tests and Applications of an Ultra High Vacuum System." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/11783977613204725302.

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碩士<br>國立臺灣大學<br>機械工程學研究所<br>97<br>This paper studies the pump down tests and applications of an ultra high vacuum (UHV) system for electron-beam direct-write lithography. The UHV system includes a vacuum chamber, an oil vane pump, a turbo molecular pump, an ion pump, a low vacuum gauge, a high vacuum gauge, and a baking heater fitted around the chamber. The prototype of the vacuum system is manufactured and performances of the prototype are tested. In order to reach different specified vacuum pressure within the shortest time, effects of the different operating process combinations are tested
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15

Chen-ming, Chiu, and 邱振銘. "Set-up of Ultra-High Vacuum System and Photo-Catalytic Reaction of TiO2." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/06687787406781217296.

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碩士<br>國立臺北科技大學<br>有機高分子研究所<br>90<br>This thesis is composed of two major parts. The first part is to construct an ultra-high vacuum（UHV）system for the purpose of surface science studies. This system includes a sputter ion gun for surface cleaning, an Auger-LEED electron spectrometer for surface chemical characterization and surface structure determination, and a quadrupole mass spectrometer（QMS）for probing the thermal desorption species from the surface. The optimal pressure after baking is＜5 ×10-10 torr and is ready to perform the investigation of surface reaction. The second pa
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16

李明羲. "Set up Ultra-High Vacuum System & Stidies CH3CN Adsorption on Cu(100)." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/74255781589124015644.

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碩士<br>國立成功大學<br>化學系<br>89<br>Set up Ultra-High Vacuum System & Studies CH3CN Adsorption on Cu(100) Abstract This thesis is composed of two major parts. The first is to build an ultra-high vacuum system, for experiments of Auger Electron Spectroscopy, Low Energy Electron Diffraction, Reflection-Absorption IR Spectroscopy and Temperature Program Desorption. The second is to study the adsorption of CH3CN on Cu(100) and O/Cu(100) surfaces. The work in the first part includes (a) using various pumping system to maintain the base pressure of the ultrahigh vacuum cham
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17

Cheng, Yu-Tsun, and 鄭宇尊. "The study of thermal outgassing on ultra high vacuum system with venting extremely dry nitrogen." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/45969494262779582367.

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碩士<br>國立清華大學<br>生醫工程與環境科學系<br>97<br>Thermal outgassing rates of aluminum and titanium chambers, which were vented to dry nitrogen atmospheres with different conditions, were measured. The vacuum surface states were compared with different venting conditions in order to obtain lower outgassing rates. Both hot and cold nitrogen gas purging dried water vapor, which was adsorbed on surface, were compared by FT-IR. The surface coverage model was also discussed. The results showed that vented by dry nitrogen (1.3 ppb humidity) and protected the vacuum chamber from atmosphere environment by glove b
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18

Yu, Min-Chih, and 游敏志. "Development of an Ultra High Pressure System with Induced Shear Stress." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/14369850481725488928.

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碩士<br>國立臺灣海洋大學<br>食品科學系<br>98<br>The ultimate goal of this study was to evaluate sterilization effects of shear stress under ultra high hydrostatic pressure. High pressure was generated by intensifier which has an area ratio of 1: 13.8, equivalent to pressure up to 950 MPa by 69 Mpa. Installing three Turcon®Stepseal®K rings on the cylinder wall is capable of sealing the vessel at 500 MPa. The first trial of induced shear stress was putting a stirrer bar in the vessel. The magnetic stirrer was to be driven by an external spinning driver. Shear stress could be present in the gap between stirrer
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19

Li, Hsiang-Fu, and 李相甫. "The development and fabrication of atom chips with through silicon via for ultra-high-vacuum atom optics cell." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/m5r7zf.

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碩士<br>國立臺北科技大學<br>機電整合研究所<br>100<br>How to miniaturize the BEC system has become one of the important topics in the atomic physics field. In this thesis, we integrated the most popular TSV technique to make the feedthrough atom chips which will be anodically bonded to a Pyrex glass cell. Then the high current can be applied to the metal wires on the atom chip through the TSV under ultra-high vacuum environment (10-10 Torr) to produce the magnetic field without any leaks. Thus how to improve the conductive and vacuum yields of TSV on atom chips is also the important goal of this study. The feed
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20

Zhang, Cemin. "Hardware Development of an Ultra-Wideband System for High Precision Localization Applications." 2008. http://trace.tennessee.edu/utk_graddiss/541.

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A precise localization system in an indoor environment has been developed. The developed system is based on transmitting and receiving picosecond pulses and carrying out a complete narrow-pulse, signal detection and processing scheme in the time domain. The challenges in developing such a system include: generating ultra wideband (UWB) pulses, pulse dispersion due to antennas, modeling of complex propagation channels with severe multipath effects, need for extremely high sampling rates for digital processing, synchronization between the tag and receivers’ clocks, clock jitter, local oscillator
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21

Chen, Kun-Ming, and 陳坤明. "Fabrication and Characterization of P-Channel MOSFETs with Poly-SiGe Gate Grown by Ultra-High Vacuum Chemical Molecular Epitaxy System." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/23417394869992047919.

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博士<br>國立交通大學<br>電子工程系<br>88<br>The polycrystalline silicon-germanium (poly-Si1-xGex) films have better properties than polycrystalline silicon (poly-Si) for device fabrications, such as lower proceeding temperature and process thermal budget. For these reasons, the poly-Si1-xGex films have been utilized for low-temperature thin film transistor fabrications and gate electrodes of metal-oxide-semiconductor field effect transistors (MOSFETs). In this work, disilane and germane were used to grow poly-Si1-xGex films at low temperature (<600oC) by cold-wall type ultra-high vacuum chemical molecular
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22

Chen, Bo-Yu, and 陳柏宇. "Setting up the ultra-high vacuum experimental system and Growth of single TiO2 nanowire on the Ti electrodes fabricated by optical lithography." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/10078740514427427744.

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碩士<br>國立東華大學<br>應用物理研究所<br>98<br>In order to study the surface of Pb atoms in the growth mechanism of Si(111) in this paper, we will establish a set of ultra-high vacuum systems containing SPA-LEED of the instruments of the surface analyzing system. According to M. M. Jamai and F. W. Abd El-Had’s Literature Record : when the vacuum fell to 10-10 mbar , the surface will be adsorbed by a layer of air molecules in 10,000 seconds. In the study of surface science, the lower degree of vacuum can maintain a longer clean surface, therefore, there is sufficient time to observe the surface physics.
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23

Chowdhury, Usman. "A cooler Penning trap to cool highly charged radioactive ions and mass measurement of 24Al." 2016. http://hdl.handle.net/1993/31511.

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Penning trap mass spectrometry (PTMS) can be used to test the Standard Model (SM) and to answer the questions related to the origin and abundance of the elements in the universe. There are several facilities worldwide specialized in PTMS and some of them can measure the masses of isotopes with half-lives in the range of milliseconds. TRIUMF’s ion trap for atomic and nuclear science (TITAN) is one such facility. In mass measurement the precision is linearly proportional to the charge state of the ion of interest. To increase the charge state, ions are charge-bred using an electron beam ion trap
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24

Narayanachari, K. V. L. V. "Stress and Microstructural Evolution During the Growth of Transition Metal Oxide Thin Films by PVD." Thesis, 2015. http://etd.iisc.ernet.in/2005/3590.

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System on Chip (SoC) and System in Package (SiP) are two electronic technologies that involve integrating multiple functionalities onto a single platform. When the platform is a single wafer, as in SOC, it requires the ability to deposit various materials that enable the different functions on to an underlying substrate that can host the electronic circuitry. Transition metal oxides which have a wide range of properties are ideal candidates for the functional material. Si wafer on which micro-electronics technology is widely commercialized is the ideal host platform. Integrating oxides with
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