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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 50 for “"Heavy Ions"”.
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Track widths of heavy ions and unit magnetic poles
Digitized by Kansas State University Libraries
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Transport and energization of heavy ions in earth’s high latitude ionosphere
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-03-01 without embargo terms
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Acceleration of heavy Ions to MeV/nucleon Energies by Ultrahigh-Intensity Lasers
In this thesis the acceleration of heavy ions to multi-MeV energies by means of a laser is demonstrated for the first time. Using an ultrahigh-intensity laser, with focal intensities exceeding 5 x 10^19 W/cm^2, the laser-plasma interaction becomes relativistic and a strong electron current is …
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Determining the role of neglected N+ heavy ions in the earth’s inner magnetosphere
Changes in the heavy ion composition in the Earth’s terrestrial ionosphere and magnetosphere can have significant impacts on the particle dynamics in the Earth’s magnetosphere-ionosphere system. The contribution of N+ to the ring current population, in addition to that of O+, has long been …
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Microstructural and mechanical characterization of silicon carbide irradiated with 158 MeV xenon swift heavy ions.
… substrates subjected to 158 MeV Xe²⁶⁺ swift heavy ion (SHI) irradiation at different fluences were investigated. To study the changes induced by irradiation 3C-SiC was irradiated with swift heavy ions (SHI) to fluences of 1×10¹⁰, 1×10¹¹, and 1×10¹³ ions/cm² at room temperature (RT). To …
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Closed-form description of polarization in elastic and inelastic scattering of light and heavy ions
… the study of elastic and inelastic scattering of heavy ions with zero spin. With regard to inelastic scattering, this implies for instance that Coulomb excitation is included in the theory. This work also uses a modification, due to Kauffmann, of Frahn's formalism, whereby the effects of much …
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A Three Dimensional Green's Function Solution Technique for the Transport of Heavy Ions in Laboratory and Space
… will be sent into space for longer durations of time compared to previous missions. The increased risk of exposure to ionizing radiation, such as Galactic Cosmic Rays and Solar Particle Events, is of great concern. Consequently, steps must be taken to ensure astronaut safety by providing …
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Do heavy ions induce the bystander effect? : study to determine the induction of the bystander effect from Fe ion beam compared to X-rays in human keratinocytes
The bystander effect is the observation that non-irradiated cells near a cell traversed by radiation express biological responses such as micronuclei formation and genomic instability. Most published studies of the bystander effect have been conducted using alpha particles, a high LET radiation. A …
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The Effect of Pressure on Ion Track Formation in Minerals
In many dielectrics, energetic heavy ions produce thin cylindrical damage zones along their trajectories. Massive physical and chemical changes can occur in these ion tracks with diameters of several nm. In nature, such trails are generated by spontaneous fission of 238U-nuclei. So far, irradiation …
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Non-adiabatic electron-ion dynamics in semiconductors under ionizing particle irradiation
Highly energetic ions have broad applications from semiconductor industry to medicine. However, as they impact materials, they inevitably cause damage, which fundamentally determines the materials' properties. Hence, the success of these applications relies on quantitative understanding of how …
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Radiation Damage in CMOS Image Sensors for Space Applications
… to take into account the different dimensions and operating conditions of the two devices. The second part of this work describes an experimental campaign to determine the effects of process variations (namely the introduction of deep doping wells and the variation of epitaxial silicon …
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Experiments and simulation of transverse cooling and heating in ion channeling
… this rule. Specially developed computer simulations provide the explanation of this unexpected behavior in terms of a hysteresis of the mean ion charge state during the ion's motion along lattice directions. This sheds new light on the process of charge exchange of heavy ions in solids.
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Exact conservation of quantum numbers B, S and Q in the statistical description of high energy collisions
High energy collisions are studied assuming that particles can be described by a hadron gas in thermal and chemical equilibrium. The exact conservation of baryon number, strangeness and charge are explicitly taken into account. For heavy ions the effect arising from the neutron surplus becomes …
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Investigation of the bubble detector response to high LET space radiation
… a complex mixture of neutrons, photons, protons, heavy ions and other particles. A special type of superheated droplet detectors referred to as space bubble detectors (SBD) have been used to evaluate the equivalent dose due to neutrons in various space missions aboard the International Space …
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The Stopping of Energetic Si, P and S Ions in Ni, Cu, Ge and GaAs Targets
… high demands on the accuracy of range calculations. A theory that predicts stopping powers and ranges for all projectile-target combinations is needed. The most important database used to report the stopping powers is the SRIM/TRIM program developed by Ziegler and coworkers. However, other …
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Effects of Xe ion irradiation of ZrN and the migration behaviour of implanted Eu
… ZrN will be exposed to di erent irradiations at elevated temperatures. Under these conditions, it should retain its properties and be able to contain ssion products. The irradiation-tolerance of ZrN to slow and swift heavy ions has been investigated and no amorphization was observed. …
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Fast-ion spectrometry of ICF implosions and laser-foil experiments at the omega and MTW laser facilities
Fast ions generated from laser-plasma interactions (LPI) have been used to study inertial confinement fusion (ICF) implosions and laser-foil interactions. LPI, which vary in nature depending on the wavelength and intensity of the driver, generate hot electrons with temperatures ranging from tens to …
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Equilibration of a scalar field theory: a comparison of methods
… collider that, among other things, collides heavy ions together at massive energies. In such heavy ion collisions a new state of matter called the Quark Gluon Plasma (QGP) is formed where, in this state, quarks are no longer confined to hadrons but are free to move about. Studying this state …
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Laser-driven beams of fast ions, relativistic electrons and coherent x-ray photons
… and highly compact sources of beams of fast ions, relativistic electrons and coherent x-rays, driven by intense laser-plasma interactions. The rapid development of high-power, short-pulse laser systems have made available peak powers reaching the petawatt regime and focused intensities …
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