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 72 for “"Linear accelerator"”.
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Automatic positioning of the electron beam for the Bates Linear Accelerator
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1999.
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Advanced Statistical Process Control Techniques for Analysis of Medical Linear Accelerator Performance
… SPC techniques in order to predict medical linear accelerator dysfunction. It will also assess which data set is most effective to implement SPC techniques that can accurately reflect the behavior of a process. Specific research objectives are addressed in the designated chapters of the …
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An Interface for Analysis of Medical Linear Accelerator Parameters Using Process Behavior Charts
Modern medical linear accelerators are complex digital devices capable of producing photon and electron beams of multiple energies. These accelerators are comprised of a number of subsystems that facilitate the treatment of cancer using an expanding range of clinical approaches. Accelerator design …
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Medical Isotope Production of Actinium 225 By Linear Accelerator Photon Irradiation of Radium 226
… a high-energy photon spectrum (generated by a linear accelerator or LINAC) to irradiate a sample of Radium-226 (half-life 1600yrs). The photo-neutron reaction liberates neutrons from Ra-226 atoms leaving behind Radium-225 (half-life 14.7 days). Ra-225 decays naturally through beta emission to …
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Characterization of the deuteron beam current in a linear accelerator for nuclear-diagnostic calibrations
… by using fusion products produced in a linear accelerator as the characteristics of the fusion products are well known. For these calibration experiments it is important to determine the absolute current of the beam striking the target, because this determines the fusion-reaction rate. A …
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The M. I. T. linear accelerator as a pulsed neutron source for a time-of-flight neutron spectrometer
Thesis (B.S.) Massachusetts Institute of Technology. Dept. of Physics, 1951.
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Assessment of imaging dose from the kilovoltage cone beam computed tomography system on board the Varian Halcyon linear accelerator
… using advanced techniques on the Varian Halcyon linear accelerator for setup verification, correction, and adaptation of the treatment plan. The frequent nature of imaging sessions mostly using kilovoltage (kV) x-ray energies has raised concerns about the contribution of low-energy radiation dose …
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Search for pre-existing Delta states at BLAST from ²H(e,e'[Delta]⁺⁺
At the MIT-Bates Linear Accelerator Center a comprehensive study of low-Q2 spin-dependent electron scattering from deuterium has been carried out using the Bates Large Acceptance Spectrometer Toroid (BLAST). This experiment has employed an 850 MeV polarized electron beam from the MIT-Bates linear …
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Polymer Gel Dosimetry in Magnetic Resonance-Image Guided Radiation Therapy
… were characterized with the Elekta Versa HD™ linear accelerator and compared to the characterizations performed with a GMW electromagnet installed in the linear accelerator vault and with the Elekta MR-Linac, a 7 MV linear accelerator integrated with a 1.5 T MR scanner. Additionally, the …
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A cyclotron injector for a proton synchroton
… generations. Thus the choice was between a linear accelerator and a cyclotron. As the resources of the laboratory were to be heavily committed in building the proton synchrotron itself it was felt that it would be better to avoid such an undertaking as the construction of a linear …
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A cyclotron injector for a proton synchroton
… generations. Thus the choice was between a linear accelerator and a cyclotron. As the resources of the laboratory were to be heavily committed in building the proton synchrotron itself it was felt that it would be better to avoid such an undertaking as the construction of a linear …
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Study of Ds and D*s mesons
… at the storage ring SPEAR at the Stanford Linear Accelerator Center. [Abstract continued in document]
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A phantom based evaluation on the effects of patient breathing motion on Stereotactic Body Radiotherapy treatment volumes
… for errors during setup, inaccuracies on the linear accelerator, and movement of targets inside the patient. If the margins are too small, there is a risk that the lesion/target may not receive the necessary dose, due to being partially missed. On the other hand, if the margins are too wide, …
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Inverse Compton Light Source: A Compact Design Proposal
… the incident laser beam. By instead using a linear accelerator system forthe electron beam, a significant increase in X-ray beam quality is possible, though even subsequent designs also featuring a storage ring offer improvement. Preceding the linear accelerator with an SRF reentrant gun …
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Development and Realization of the IGRT Inline Concept
… integration of an imaging system into a medical linear accelerator for radiotherapy is presented, and its technical realization is described. An x-ray tube and a flat panel detector were installed along the treatment beam axis, such that the detector could not only be used for x-ray imaging of …
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Precision measurement of the proton electric to magnetic form factor ratio with BLAST
… ... in the South Hall Ring of the MIT-Bates Linear Accelerator Facility. This experiment used a polarized electron beam, a pure hydrogen internal polarized target, and the symmetric Bates Large Acceptance Spectrometer Toroid (BLAST) detector. By measuring the spin-dependent elastic ... …
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A measurement of the neutron magnetic form factor Gn̳M̳ form quasi-elastic ²[right arrow]H ([right arrow]e, e') at low Q²
… polarized electron beam of the MIT-Bates Linear Accelerator was used in conjunction with an isotopically pure, polarized deuterium internal gas target. The Bates Large Acceptance Spectrometer Toroid (BLAST) was used for the measurement. The form factor GnM was extracted from the ratio of …
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Search for axion-like particles in the slac beam dump
… axion-like particles was made at the Stanford Linear Accelerator Center (SLAC) by dumping 30 Coulombs of 20 GeV electrons into a beam absorption facility. After 179 meters of earth shielding the in-flight decay of the particle into two photons or an electron-positron pair, in a decay volume of …
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Identifying Treatment Planning System Errors In Iroc-Houston Head and Neck Phantom Irradiations
… that have not sufficiently modelled their linear accelerators in their TPS model. Linear accelerator point measurement data from IROC-H’s site visits was aggregated and analyzed from over 30 linear accelerator models. Dosimetrically similar models were combined to create “classes”. The …
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Measurement of the Branching Fraction and Search for Direct CP-Violation in the Radiative Decay B to K*Gamma with the BABAR Detector
… PEP-II des Stanford Linear Accelerator Centers (SLAC) aufgezeichnet. Die B->K*Gamma Verzweigungsverhältnisse wurden in vier K*-Zerfallskanälen gemessen. Eine Suche nach direkter CP-Verletzung im B->K*Gamma Kanal wurde ebenfalls durchgeführt.
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