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 98 for “"Ion trap"”.
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Development of a Laminar Construction Quadrupole Ion Trap
The three-dimensional quadrupole ion trap (QIT) is an extraordinary device. It functions both as an ion store in which gaseous ions can be confined for a period of time and as a mass spectrometer of considerable mass range and variable mass resolution. Over the past few decades, it has evolved into …
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ION TRAP SYSTEM TOWARDS 176LU+ 3D2 CLOCK TRANSITION
The 176Lu+ ion has a unique property that it possesses multiple clock transitions. In combination with hyperfine averaging, two of these transitions (1S0 – 3D1 and 1S0 – 3D2) present both long lifetimes and low sensitivity to the electromagnetic environment. Fully characterizing both transitions …
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Effects of Surface Ion Milling on Ion Trap Heating
Ions trapped above a surface electrode chip are a viable candidate for a scalable qubit architecture. The internal electronic state of the ions serve as qubits, while the shared motional modes of ions in a lattice serve as a quantum bus by which information can be shared. Gate operations are …
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Towards a cryogenic planar ion trap for Sr-88
This thesis describes experiments with ion traps constructed with electrodes in a single two-dimensional plane, and ion traps operated in a cryogenic environment at 77K and 4K temperatures. These two technologies address needs which arise in developing potentially scalable approaches to quantum …
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Optical cavity integrated surface ion trap for enhanced light collection
Ion trap systems allow the faithful storage and manipulation of qubits encoded in the energy levels of the ions, and can be interfaced with photonic qubits that can be transmitted to connect remote quantum systems. Single photons transmitted from two remote sites, each entangled with one quantum …
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Shuttling of ions for characterization of a microfabricated ion trap
… results demonstrating the characterization of a planar Paul trap. I discuss the theory of ion trapping and analyze the voltages required for shuttling. Next, the characteristics of a digital-to-analog converter (DAC) are calibrated, and this instrument is integrated into trapping …
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Sensitive, 3D micromotion compensation in a surface-electrode ion trap
Following successful demonstrations of quantum algorithms and error correction with a handful of trapped ions in a macroscopic, machined Paul trap, there is a growing effort to move towards microfabricated traps with all the electrodes on a single chip. These traps, known as surface-electrode ion …
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Electronic spectroscopy of flavins in a cryogenic 22 - pole ion trap
… great biological relevance, but little information is known about the isolated flavins. This dissertation deals with the electronic photodissociation spectroscopy of cryogenically cooled flavins. The optical spectra are recorded with a tandem mass spectrometer coupled to a cryogenic 22 - pole …
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IN SITU PLASMA REMOVAL OF SURFACE CONTAMINANTS FROM ION TRAP ELECTRODES
In this thesis, the construction and implementation of an in situ plasma discharge designed to remove surface contaminants from electrodes in an ion trapping experimental system is presented with results. In recent years, many advances have been made in using ion traps for quantum information …
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Towards nuclear excitation via electron capture in an electron beam ion trap
Nuclear Excitation via Electron Capture (NEEC) is the inverse process of internal electron conversion, where a free electron is captured into an atomic vacancy simultaneously exciting the nucleus to a higher-energy state. This process occurs naturally in hot astrophysical environments, and can …
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A 674 nm external cavity diode laser for a ⁸⁸Sr⁺ ion trap
Atomic ion traps are a promising candidate for scalable quantum information processing. In this thesis, a 674 nm extended cavity diode laser is built to address an optical quantum bit in ⁸⁸Sr⁺ with the goal of testing such traps. To find this transition, a depletion experiment is performed in which …
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Development of a quadrupole ion trap / time-of-flight mass spectrometer for mass resolution and ion photophysics
… mass spectrometer, consisting of a quadrupole ion trap (QIT) and a time-of-flight, is described for ion mass resolution and photophysics. Ions are generated externally by electrospray ionization and trapped in the quadrupole ion trap before extraction to the time-of-flight section for mass …
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Development Of A Field-Portable Miniature Mass Spectrometer Designed For In-Situ Analysis And Ion Trap Miniaturization
… vacuum systems, mass analyzers, electronics, and ionization sources have allowed for the development of field-portable mass spectrometers. The performance of portable instruments has received much attention for their utility in the detection of illicit drugs, explosives, environmental …
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Interaction of trapped ions with trapped atoms
In this thesis, I present results from two Paul-trap based ion traps carried out in the Vuletić laboratory: the Atom-Ion trap for collision studies between cold atoms and cold ions, and the Cavity-Array trap for studying the interaction between ionic ensembles and photons. The Atom-Ion trap …
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Mass spectrometric investigation of the OH induced oxidation of isoprene using 0 2 + as a chemical ionization reagent
… compound emitted into the atmosphere by vegetation, with an annual global emission rate of 500 Tg/yr. It represents almost 50% of all biogenic non-methane hydrocarbons on a global scale. It has a substantial impact on troposphere oxidants. The focus of this research is a preliminary …
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Integrated chips and optical cavities for trapped ion quantum information processing
Quantum information processing is a new and exciting field which uses quantum mechanical systems to perform information processing. At the heart of the excitement are quantum computation - which promises efficient algorithms for simulating physical systems, factoring, and searching unsorted …
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Practicality of Quantum Information Processing
Quantum Information Processing (QIP) is expected to bring revolutionary enhancement to various technological areas. However, today's QIP applications are far from being practical. The problem involves both hardware issues, i.e., quantum devices are imperfect, and software issues, i.e., the …
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An optical-fiber interface to a trapped-ion quantum computer
The trapped-ion quantum computer is an atom-based implementation of a quantum computer that has successfully demonstrated numerous quantum algorithms and the potential for scalability. Fundamental to its operation is the short-range Coulombic interaction among its atomic ion registers, which has …
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Construction And Demonstration Of A Tandem Mass Spectrometer Based Instrument For Cold Ion Spectroscopy
<p>A new instrument incorporating ion trap based tandem mass spectrometry and cold ion UV and UV-IR double resonance spectroscopy has been developed at Purdue University for the study of gas phase, biologically relevant ions. The instrument incorporates multiple quadrupole linear ion trap mass …
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Uncovering unique N-linked glycan structural isomers in cancer via MS(n) disassembly
<p>Molecular glycosylation is involved in key developmental roles including control of cell differentiation, innate immunity and signal transduction. Equally as demonstrable are numerous aspects of tumor development, from cellular proliferation to angiogenesis and metastasis. This sensitivity to …
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