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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 545 for “"electron beam"”.
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Electron Beam Parametric Converter
Made available in DSpace on 2014-12-08T22:23:31Z (GMT). No. of bitstreams: 1 6408454.pdf: 1581271 bytes, checksum: 6f245ec23fc737ea666a8cda127a5e78 (MD5) Previous issue date: 1964
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Electron-beam-pumped recombination lasers
The first known instance of electron-beam pumping of the 546.1 nm mercury laser is reported. This has been achieved using high-energy electrons to create intense ionization in a coaxial diode chamber containing a mixture of noble gases with a small amount of mercury vapor. Also reported are the …
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"Dosimetric Properties of Clinac Electron Beam Depth Doses: An Investigation of Electron Beam ""Golden"" Data Set"
Made available in DSpace on 2017-07-06T18:55:55Z (GMT). No. of bitstreams: 2 Qayyum_Muqeem_A_MS.pdf: 3223744 bytes, checksum: a4b1aa0ed198965f4f43c8882d87d2ec (MD5) license.txt: 4813 bytes, checksum: 715c4321821a960fa1a1e91d2ac7ebce (MD5) Previous issue date: 2006
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Electron beam characterization of carbon nanostructures
… in fossil fuel, hydrogen storage, scaled-down electronics, and other nanotechnology. Electron microscope images of "edge-on" graphene sheets show linear image features due to the projected potential of the sheets. Here, intensity profiles along these linear features can measure the curvature of …
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Electron beam (EB)-assisted materials fabrication
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1995.
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Electron beam lithography for nano-antenna fabrication
… decades; in this research project, I examined Electron Beam Lithography (EBL) for fabrication of nano-antennas and then parameterized EBL variables to improve patterning. I overcame difficulties in some steps of this method to make the process easier and faster. In this experiment I analyzed …
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Electron Beam Machine for Continuous Metallurgical Processes
Interest in harnessing the unique properties of electron beams to a wider range of applications has continued since its first industrial use, as a welding machine, in the 1950's. In recent years attention has been concentrated upon its application to continuous metallurgical processing. The design …
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Magnetic bearing stages for electron beam lithography
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1998.
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The electron beam welding of molybdenum sheet
Thesis: B.S., Massachusetts Institute of Technology, Department of Metallurgy, 1961
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Nanometer-scale placement in electron-beam lithography
Electron-beam lithography is capable of high-resolution lithographic pattern generation (down to 10 nm or below). However, for conventional e-beam lithography, pattern-placement accuracy is inferior to resolution. Despite significant efforts to improve pattern placement, a limit is being …
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Improving Dose Calculations In Electron-beam Radiation Therapy
The finite range of electrons in tissue makes electron beams a useful radiation treatment modality for many tumour sites. However, the simplistic methods of dose calculation in current clinical use lack sufficient accuracy in many situations of clinical importance. This thesis rests on the premise …
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Radio frequency driven direct current electron beam source
A new type of electron beam source employing ion-induced secondary electron emission from cold cathodes is developed for feature charge neutralization during plasma etching. A low pressure (approximately 2 – 20 mTorr) inductively coupled plasma provides ions which impinge on a high secondary …
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Advanced Electron-Beam Techniques for Solar Cell Characterization
… a detailed comparative study of advanced electron-beam based techniques for solar cell characterization. Firstly, the advantage of the subsurface imaging of scanning electron acoustic microscopy (SEAM) was utilized to characterize the structural properties of saw-damage-induced defects and …
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Transport phenomena in electron beam melting and evaporation
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1997.
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Non-perturbative electron beam characterization with a microwiggler
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
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Real-time spatial-phase-locked electron-beam lithography
The ability of electron-beam lithography (EBL) to create sub-10-nm features with arbitrary geometry makes it a critical tool in many important applications in nanoscale science and technology. The conventional EBL system is limited by its poor absolute-placement accuracy, often worse than its …
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Electron Beam Diagnostic at the ELBE Free Electron Laser
… to generate electromagnetic radiation as well as beams of secondary particles. The figure below shows the layout of the facility. ELBE is based on a superconducting electron linac. The linac consists of two accelerating modules and uses TESLA type nine-cell niobium cavities, two cavities in each …
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Improvements to the alignment process in electron-beam lithography
Electron beam lithography is capable of defining structures with sub-10 nm linewidths. To exploit this capability to produce working devices with structures defined in multiple 'lithographic steps' a process of alignment must be used. The conventional method of scanning the electron beam across …
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