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Showing 1 to 20 of 5267 for “"Beam"”.
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High current coaxial ion beam/laser beam spectrometer
… of molecular ions is described. In the new ion beam machine, the ion beam and laser beam overlap in a coaxial geometry. The machine has much higher ion current than an apparatus previous used. The laser beam induces transitions between internal states of the molecular ion. The transitions are …
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Chemical beam, gas-source molecular beam, and molecular beam epitaxial growth of III/V compound semiconductor materials
… has been developed. The gas source molecular beam/chemical beam epitaxial growth system features a 7000 l/s diffusion pumping system mounted directly beneath a molecular beam epitaxial growth chamber. After careful thermal cleaning of the new growth chamber, p-type GaAs of higher purity than …
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Electron beam dynamics for the ISIS bremsstrahlung beam generation system
An electron beam transport system was designed for use in the Bremsstrahlung Beam Generation System of the Integrated Stand-off Inspection System (ISIS). The purpose of this electron transport system was to provide for electron beam diagnostics and energy selection while also positioning the …
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Silicon molecular beam epitaxy
… Si-MBE layers prepared in a commercial molecular beam growth system and in the evaluation of their electrical and crystallographic properties. A number of technological problems associated with flux monitoring, the flaking of excess Si deposits and the use of closed-cycle He cryopumps during …
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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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The Reflecting Beam Waveguide
Made available in DSpace on 2014-12-08T22:23:33Z (GMT). No. of bitstreams: 1 6500800.pdf: 1860168 bytes, checksum: 31b6584130e13c37a7af75830fe9c08d (MD5) Previous issue date: 1964
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Steel beam foundation plates
Made available in DSpace on 2017-11-30T22:46:16Z (GMT). No. of bitstreams: 2 5956508.pdf: 1225827 bytes, checksum: 2a3f4dbc21ea6eb6050337e6370e4012 (MD5) license.txt: 4813 bytes, checksum: 715c4321821a960fa1a1e91d2ac7ebce (MD5) Previous issue date: 1893
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Multi-GPU Accelerated High-Fidelity Simulations of Beam-Beam Effects in Particle Colliders
<p>Numerical simulation of beam-beam effects in particle colliders are crucial in understanding and the design of future machines such as electron-ion colliders (JLEIC), linac-ring machines (eRHIC) or LHeC. These simulations model the non-linear collision dynamics of two counter rotating beams in …
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The Beam Dynamics And Beam Related Uncertainties In Fermilab Muon G-2 Experiment
… uncertainties. In this work, we focus on the beam dynamics and beam associated uncertainties, which are important and must be better understood. We will discuss the electrostatic quadrupole system, particularly the hardware-related quad plate alignment and the quad extension and readout …
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Single-band and Dual-band Beam Switching Systems and Offset-fed Beam Scanning Reflectarray
… because of its high-gain, low profile, and beam reconfiguration capability. Beam scanning capability and multi-band operation of the microstrip reflectarray have been main research topics in the reflectarray design. Narrow bandwidth of the reflectarray is the main obstacle for the various …
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Mechanisms of focused ion beam (FIB) material removal and rearrangement at high beam flux
Focused ion beam (FIB) is widely used as a material removal tool for applications ranging from electron microscope sample preparation to nanopore processing for DNA sequencing. Despite the wide spread use of FIB, the basic material removal mechanisms are not well understood and may depend upon FIB …
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Annular beam X-ray imaging
… imaging by scanning objects through an annular beam of X‐rays. The resultant ring shaped projections record depth dependent parallax. The study focuses on two different scanning methods. First, a single axis scan has been employed to record curvilinear stereoscopic images. Second, a two axis …
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Creep Buckling of Beam-Columns
Made available in DSpace on 2014-12-04T23:11:04Z (GMT). No. of bitstreams: 1 6200586.pdf: 2060319 bytes, checksum: feea5973f62dfacdd0059cc3588552da (MD5) Previous issue date: 1961
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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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Nanofabrication using focused ion beam
Focused ion beam (FIB) technique uses a focused beam of ions to scan the surface of a specimen, analogous to the way scanning electron microscope (SEM) utilizes electrons. Recent developments in the FIB technology have led to beam spot size below 10 nm, which makes FIB suitable for nanofabrication. …
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Neurocontrol of a cantilever beam
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2000.
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Geometry of cone-beam reconstruction
… we use to unify all existing analytical cone-beam reconstruction methods. These reconstructions are based on formulae derived by Tuy [Tuy, 1983], Smith [Smith, 1985] and Grangeat [Grangeat, 1991] which explicitly link the cone-beam data to some intermediate functions in the Radon transform …
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