Office of the President (RIT): Recent submissions
Now showing items 81-100 of 175
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Experimental study of propagation of intense relativistic electron beams in nonconducting vacuum drift tubes after passage through a localized plasma source
(American institute of physics - Journal of applied physics, 1987-04-01)Presents a study which examined the propagation of intense relativistic electron beams into evacuated nonconducting drift tubes after passage through a localized plasma source. Details of the time-integrated photographs ... -
Second generation, high-power, fundamental mode large-orbit gyrotron experiments
(American Institute of Physics, 1991-01-15)Experimental studies of a large-orbit gyrotron device operating at the fundamental of the cyclotron frequency have been conducted. Based on results of initial investigations at the University of Maryland a linear beam ... -
A High-voltage triggered pseudospark discharge experiment
(American Institute of Physics, 1996-11-01)The design and execution of a pulsed high-voltage (350–400 keV) triggered pseudospark discharge experiment is reported. Experimental studies were carried out to obtain an optimal design for stable and reliable pseudospark ... -
Microwave generation in a high voltage triggered pseudospark discharge experiment
(American Institute of Physics, 1998-04-01)A set of five experiments to study the microwave emission accompanying the high voltage pseudospark discharge are reported. The generation of the microwaves in all cases but one is attributed to electron beam-plasma ... -
Electromagentic properties of corrugated and smooth waveguides filled with radially inhomogeneous plasma
(Institute of Electrical and Electronics Engineers, 1996)No abstract found. -
Design of a low-voltage, axially modulated, cusp-injected, third harmonic, x-band gyrotron amplifier experiment
(Institute of Electrical and Electronics Engineers, 1997-11)We present the design of a prebunched, third harmonic small-orbit gyrotron experiment that utilizes a 45 kV, 8 A beam to produce over 185 kW of amplified power at 9.9 GHz in a 1.23 kG magnetic field. We detail the design ... -
Experimental studies of overmoded relativistic backward-wave oscillators
(Institute of Electrical and Electronics Engineers, 1998-06)Internal field-emission breakdown in the electrodynamic structures of high-power microwave (HPM) devices can seriously limit the device’s output power and pulse duration. Increasing the diameter of the electrodynamic ... -
High power high brightness electron beam generation in a pulse-line driven pseudospark discharge
(IEEE, 1993-05-17)High brightness (~3×1010 A/m2rad2 ), high power density (~1010 W/cm2) electron beams have been generated by the mating of a hollow-cathode discharge device operating in the pseudospark regime to the output of a high power ... -
A fundamental mode, high-power, large-orbit gyrotron using a rectangular interaction region
(American Institute of Physics, 1993-06-15)This paper reports on experimental and theoretical studies of a fundamental mode, large-orbit gyrotron oscillator designed to produce high-power radiation in the rectangular TE,a mode at about 650 MHz. A basic linear ... -
Experimental studies of high power plasma filled backward wave oscillators
(IEEE, 1990-05-21)Summary form only given, as follows. It has previously been demonstrated that a plasma-loaded backward wave oscillator (BWO) powered by a relativistic electron beam can generate hundreds of megawatts of microwave radiation ... -
Strongly graded hereditary orders
(2001-08-28)Let R be a Dedekind domain with global quotient field K. The purpose of this note is to provide a characterization of when a strongly graded R-order with semiprime 1-component is hereditary. This generalizes earlier work ... -
Automorphisms of tiled orders
(Elsevier, 2002)Let Λ be a tiled R-order. We give a description of AutR(Λ) as the semidirect product of Inn(Λ) and a certain subgroup of Aut(Q(Λ)), where Q(Λ) is the link graph of Λ. Additionally, we give criteria for determining when ... -
The Globalization problem for inner automorphisms and Skolem-Noether theorems
(World Science, 2003-07)We investigate the circumstances under which an inner automorphism of a ring with local units can be built from “local” information. Specifically, we consider three natural “inner” type properties for an automorphism of ... -
Hereditary crossed products
(American Mathmatical Society, 2000-03-27)We characterize when a crossed product order over a maximal order in a central simple algebra by a finite group is hereditary. We need only concentrate on the cases when the group acts as inner automorphisms and when ... -
On when a graded ring is graded equivalent to a crossed product
(American Mathmatical Society, 1996-04)Let R be a ring graded by a group G. We are concerned with describing those G-graded rings that are graded equivalent to G-crossed products. We give necessary and sufficient conditions for when a strongly graded ring ... -
Isomorphisms of row and column finite matrix rings
(American Mathmatical Society, 1997-06)This paper investigates the ring-theoretic similarities and the cate- gorical dissimilarities between the ring RFM(R) of row finite matrices and the ring RCFM(R) of row and column finite matrices. For example, we prove ... -
Graded equivalence theory with applications
(Elsevier, 1995-03-01)We develop the foundations for graded equivalence theory and apply them to investigate properties such as primeness, finite representation type, and vertex theory of graded rings. The key fact that we prove is that, for ... -
Experimental studies of heavy ion collection acceleration at the University of Maryland
(IEEE, 1979-06)The collective acceleration of ions (H,C,N) from a well-localized ion source immediately downstream of a relativistic electron beam diode is experimentally investigated, The ions are produced either in a wellconfined gas ... -
High-average-power CW FELs for application to plasma heating designs and experiments
(IEEE, 1990)A short-period-wiggler (period - 1 cm), sheet-beam FEL has been proposed as a low-cost source of high-average-power (1 MW) millimeter-wave radiation for plasma heating and space-based radar applications. Recent calculations ...