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 10 of 10 for “"carbon ions"”.
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Experimental study on carbon fragmentation for hadrontherapy
… applies collimated beams of protons or heavier ions for the sterilization of tumor cells. Due to their very favorable profile of the released dose in tissue, the charged hadron beams can be very effective in destroying the tumor and sparing the adjacent healthy tissue in comparison to the …
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Ion dosimetry for radiobiology experiments employing laser-accelerated beams
… in this thesis are to investigate the relationships between particle LET and RCF optical density response to dose delivered by particles accelerated with traditional low dose-rate acceleration mechanisms. These experiments using low energy protons (5 and 10 MeV) and carbon ions (3 and 6 …
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Test particle studies of acceleration and transport in solar and tokamak plasmas
… used to study two distinct plasma physics situations. In the first case, the collisionless response of protons to cold plasma fast Alfven waves propagating in a non-uniform magnetic field configuration (specifically, a two-dimensional X-point field) is studied. The field perturbations associated …
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Treatment planning for manifold multi-ion particle therapy
… dose to the target - most commonly protons or carbon ions. While such radiation therapy is highly effective for the treatment of many cancers, there is growing interest in using combinations of two or three ion species for cancer therapy, due to the ability to control both the dose distribution …
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Uncertainty In The Physical Basis of Estimates of Relative Biological Effectiveness In Carbon Radiotherapy
<p>Carbon ion radiotherapy is a novel modality used for the treatment of tumors that are unresectable, close to critical structures, or resistant to standard radiotherapy. A unique benefit of this therapy is the relative biological effectiveness (RBE) of the beam (i.e., how biologically potent …
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The Importance of Dna Repair Capacity to (And A Model to Predict) Cell Radiosensitivity to Ions
<p>Radiation therapy with ions has a number of advantages over conventional radiation therapy with photons, including favorable depth-dose distributions, greater relative biological effectiveness (RBE) and a lesser dependence on a number of biological factors known to affect radiosensitivity to …
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Fabrication and Characterization of Aluminum Nano-Carbon Composites and Investigation of Their Electrical Conductivity
Incorporating nano-carbon phases into metal-matrix composites is a promising strategy for simultaneously enhancing electrical conductivity and mechanical properties of metals. Here, we describe the manufacture of novel nano-carbon-aluminum composites by an electro-charge-assisted process (EAP) that …
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Elementary processes in alkane-based reactive ion etching of III-V semiconductors
… involved in this technology, the interactions of some relevant ions and free radicals with these semiconductors were examined. To simulate the low energy ion bombardment that occurs in RIE using alkanes, GaAs and InP were exposed to 20-500 eV carbon ions, using a mass-separated carbon ion …
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Radiation biophysical modeling of the FLASH effect: from mechanistic understanding towards clinical endpoint prediction
… in animals, e.g., no severe fibrotic lesions on mini pig skin. UHDR electron irradiation was successfully tested in a first patient with cutaneous lymphoma. Furthermore, the first clinical trial with proton-FLASH irradiation is ongoing. In addition to that, the FLASH effect has been …
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Wirkung schwerer Ionen auf strahlenresistente und strahlensensitive Tumorzellen
… Die Verteilungsmuster der verschiedenen Aberrationstypen und die Dosis-Effekt-Beziehungen der analysierten Chromosomenaberrationen ließen Rückschlüsse auf die Rolle der Chromosomen-Domänentopologie bzw. der Chomatinstruktur für die Strahlenreaktion der unter-suchten Zellen zu. Die Clusterbildung …