| Magic User's Manual 2006 |
DEC 2006 |
22 pages |
| Authors:
Larry Ludeking; MISSION RESEARCH CORP NEWINGTON VA
|
 | This is the Help File for the Magic Tool Suite for Windows. It uses the standard Windows Help so it is pretty self-explanatory. You can use the panel to the left to scan through the table of contents. To select a part, chapter, or section click on it. To use the index, click on the index tab and type your search query into the text field. Make a selection from ... |
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| Development of Improved Capabilities for Depth Determination |
Oct 2001 |
11 pages |
| Authors:
Mark D Fisk; Clinton Conrad; David Jepsen; MISSION RESEARCH CORP NEWINGTON VA
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| The objective of this research is to develop improved procedures and criteria for identification and validation of seismic depth phases. This effort includes: (1) inspection of waveforms for events in the Reviewed Event Bulletin (REB) to determine whether depth phases have been identified properly; (2) evaluation of existing procedures and criteria for depth-phase validation; (3) development of statistical methods to quantify the moveout of pP-and sP-P, accounting for timing uncertainties; ... |
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| High-Sensitivity Broad-Frequency-Response Fiber-Optic Radio-Frequency (RF) Field Sensor |
DEC 1999 |
42 pages |
| Authors:
Richard S. Smith; Laszlo Koves; MISSION RESEARCH CORP NEWINGTON VA
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| Mission Research Corporation has developed a minimally-perturbing, broadband, fiber-optic RF probe for AFRL, Rome. This probe operates from 100 MHz to 18 GHz as limited by an output low-noise amplifier. Without its output amplifier, its response is flat from below 1 MHz to 8 GHz, but drops considerably from 8 GHz to 18 GHz. The probe outputs an RF signal proportional to the RF field at ... |
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| Magic User's Manual |
MAR 1999 |
351 pages |
| Authors:
Larry Ludeking; David Smithe; Mike Bettenhausen; Scott Hayes; MISSION RESEARCH CORP NEWINGTON VA
|
| Current research efforts in the area of high-power microwave and plasma physics make extensive use of computer simulation to reduce design time, investigate new design concepts, and examine the performance envelope of a wide variety of devices. The research includes, but is not limited to, such diverse items as SWO's, TWT's, klystrons, gyrotrons, the helicon, CFA's, and micro- hollow cathodes. The instrument developed for much of this research is the ... |
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| Comparison of HELIX TWT Simulation Using 2-D PIC (Magic), 2-D Modal (Gator), and 1-D Modal (Christine) Methods |
MAY 1998 |
32 pages |
| Authors:
David N. Smithe; H. Freund; T. M. Antonsen Jr.; E. Zaidman; B. Levush; MISSION RESEARCH CORP NEWINGTON VA
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| A series of comparisons between three different helix TWT design and simulation codes has been performed. The codes represent various different levels of approximation and speed. All codes utilize the sheath helix approximation. The 2-D PIC code, MAGIC, solves the Maxwell-Lorentz equations directly, in time, through simulations with large numbers of particles. Therefore, it is expected that the PIC code is capable of resolving the space- charge effects accurately. Unfortunately, ... |
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| Design and Development of a Plasma Wakefield Klystron |
23 DEC 96 |
34 pages |
| Authors:
John Pasour; David Smithe; Robert Seeley; Khanh Nguyen; MISSION RESEARCH CORP NEWINGTON VA
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| This project investigated a novel microwave source that utilizes a plasma to bunch the electron beam. The electron beam interacts with the plasma via the wakefield produced by the head of the electron beam as it passes through the plasma. The resulting plasma oscillations bunch the beam at a frequency proportional to the plasma frequency. Thus, the device can be tuned by varying the plasma density. The theory of the ... |
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| Magic User's Manual |
NOV 96 |
400 pages |
| Authors:
Bruce Goplen; Larry Ludeking; David Smithe; MISSION RESEARCH CORP NEWINGTON VA
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| The primary objective of this program was to further the research goals of AFOSR in plasma physics. MRC's role in this program was to collaborate with other AFOSR-sponsored researchers in the development and application of state-of-the-art computational methods to critical research problems. The principal mechanism for this collaboration was the joint research group. The objectives of this group includes not only the performance of superior research, but also the advancement ... |
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| Use of Short Time Series for Early Global Warming Trend Detection for Ocean Acoustic Travel Times |
28 SEP 96 |
22 pages |
| Authors:
Gary D. McCartor; William R. Wortman; Steven Bottone; MISSION RESEARCH CORP NEWINGTON VA
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| Previous work indicated that for expected variability of ocean acoustic propagation times and the level of anticipated warming trends, it may take at least two decades of observation to establish, with an adequate level of confidence, that warming does or does not exist. In the current report, we have attempted to establish the extent to which the use of data from a shorter period may allow at least better definition ... |
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| Interactive World Wide Web Page for Custom Event Screening at the Prototype International Data Center |
SEP 96 |
49 pages |
| Authors:
Mark D. Fisk; Richard J. Carlson; Valeriu Burlacu; Gary D. McCartor; MISSION RESEARCH CORP NEWINGTON VA
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| This report describes statistical event characterization tools and related data products being implemented at the Prototype International Data Center (PIDC) in Arlington, Virginia. Preliminary event screening analyses at the PIDC currently utilize seismic measures of location, depth, mb-Ms, and their uncertainties, as well as regional high-frequency amplitude ratios. To make these tools and data products accessible to remote users, interactive World Wide Web pages have been implemented for custom event ... |
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| Design and Testing of Ubitron Amplifier Tubes |
OCT 93 |
199 pages |
| Authors:
Dean Pershing; MISSION RESEARCH CORP NEWINGTON VA
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| The components for a single-stage/single-pass Ku band ubitron amplifier have been designed, constructed, and tested. Notable features of this device include a high quality electron beam and circularly polarized microwave and wiggler fields. Stable operation of the assembled amplifier has been achieved during initial testing using a modified SLAC klystron electron gun. In addition, amplifier and oscillator operation was measured using an unusual rippled beam parameter regime. The ubitron was ... |
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| Acoustic-Gravity Waves From Low-Altitude Localized Disturbances |
01 MAY 93 |
62 pages |
| Authors:
Steven Bottone; MISSION RESEARCH CORP NEWINGTON VA
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| A physics-based analytic model of the ionospheric effects of low- altitude nuclear explosions due to acoustic-gravity waves (AGW) is produced. The model contains the essence of AGW theory predictions while including basic atmospheric chemistry effects to allow descriptions of AGW induced changes for both nighttime and daytime ionospheres. The model allows multiple explosions at arbitrary times and locations although its experimental basis is, of course, from single explosion data. ... |
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| SOS User's Manual. A Joint Industry-University Program for Computational Plasma |
OCT 91 |
226 pages |
| Authors:
Bruce Goplen; Larry Ludeking; David Smithe; Gary Warren; MISSION RESEARCH CORP NEWINGTON VA
|
| SOS is a three-dimensional, finite-difference code for simulating electromagnetic plasma physics processes, i.e., those processes which involve space charge and/or electromagnetic fields and their interactions. SOS contains a set of time-domain algorithms such that, beginning from a specified initial state, the code simulates a physical process as it evolves in time. In SOS, the full set of Maxwell's time-dependent equations are solved to obtain electromagnetic fields. Similarly, the complete Lorentz ... |
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| The DIMEX Experiment |
25 SEP 90 |
68 pages |
| Authors:
John Brandenburg; W. M. Bollen; Robert Seeley; Khanh Nguyen; MISSION RESEARCH CORP NEWINGTON VA
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| DIMEX (DIpole plasma Microwave EXposure) experiment has demonstrated both stable confinement of plasma at electron densities of the order of 10 to the 11th power and electron temperatures of 1 eV and also has demonstrated strong absorption of 1 GHz microwaves with much reduced reflection (-10dB). In addition, high-intensity microwaves (greater than 0.1 W/sq cm) were strongly reflected, indicating that the plasma shell can function as a cloak to radar ... |
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| The Theory and Simulation of Plasmoid Formation and Propagation |
JAN 90 |
34 pages |
| Authors:
John Brandenburg; Gary Warren; Richard Worl; MISSION RESEARCH CORP NEWINGTON VA
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| A summary of progress on the theory and simulation of plasmoid formation and propagation is presented. Progress occurred in two areas. First, an analytical model or core-halo dynamics was derived for an arrow-type plasmoid. This model predicts halo expansion that is approximately linear in time with a velocity proportional to the core ion sound speed and a core expansion that is logarithmic in time. Second, simulation efforts have successfully formed ... |
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| Particle Subcycling in Pulsed-Power Simulations |
30 SEP 87 |
31 pages |
| Authors:
Bruce Goplen; Richard Worl; John Brandenburg; MISSION RESEARCH CORP NEWINGTON VA
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| A particle subcycling algorithm has been developed for and tested in the MAGIC code. The objective is to achieve greater efficiency in pulsed-power simulations. The algorithm performs particle kinematics calculations using a time step which is smaller than the electromagnetic time step, thereby allowing orbit resolution in regions of high magnetic field. In testing this algorithm, an energy nonconserving instability was observed. This instability, named the subcycling cyclotron instability, has ... |
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