| Simulation of Plasma Expansion Using a Two-Timescale Accelerated Particle-in-Cell Method |
15 DEC 2003 |
8 pages |
| Authors:
M. R. Gibbons; M. Santi; D. B. VanGilder; J. M. Fife; ENGINEERING RESEARCH AND CONSULTING INC(ERC INC) EDWARDS AFB CA
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 | COLISEUM is an application programming interface which performs calculations of plasma propagation and interaction with arbitrary 3-D surfaces. The applications of COLISEUM are wide-ranging, but include simulating ion source configurations inside vacuum chambers and predicting sputtering and re- deposition on surfaces. COLISEUM allows users to easily define complicated 3-D geometries using off the shelf CAD software, then select from a set of plasma expansion models of varying fidelities and numerical ... |
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| Flexible Three-Dimensional Modeling of Electric Thrusters in Vacuum Chambers |
25 JUN 2003 |
10 pages |
| Authors:
M. R. Gibbons; D. E. Kirtley; D. B. VanGilder; J. M. Fife; ENGINEERING RESEARCH AND CONSULTING INC(ERC INC) EDWARDS AFB CA
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| A national team of researchers is developing a software system, COLISEUM, which performs calculations of plasma propagation and interaction with arbitrary 3%D surfaces. The applications of COLISEUM are wide- ranging, hut include simulating engine test configurations inside vacuum chambers and predicting sputtering and re-deposition on spacecraft surfaces. COLISEUM allows users to easily define complicated 3-D geometries using off the shelf CAD software, then select from a set of plasma expansion ... |
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| 3-D Computation of Surface Sputtering and Redeposition Due to Hall Thruster Plumes |
23 DEC 2002 |
11 pages |
| Authors:
J. M. Fife; M. R. Gibbons; W. A. Hargus; D. B. VanGilder; D. E. Kirtley; AIR FORCE RESEARCH LAB EDWARDS AFB CA SPACE AND MISSILE PROPULSION DIV
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| A 3-D computational plasma interaction modeling system is being developed to predict the interaction of electric propulsion plumes with surfaces. The system, named COLISEUM, Is designed to be flexible, usable, and expandable, allowing users to define surfaces with their choice of off-the-shelf 3-D solid modeling packages. These surfaces are then loaded into COLISEUM, which calculates plasma expansion from electric thrusters using a variety of functional modules. Functional modules are interchangeable, ... |
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| The Development of a Flexible, Usable Plasma Interaction Modeling System |
13 JUN 2002 |
10 pages |
| Authors:
J. M. Fife; M. R. Gibbons; D. B. VanGilder; D. E. Kirtley; AIR FORCE RESEARCH LAB EDWARDS AFB CA SPACE AND MISSILE PROPULSION DIV
|
| A 3-D computational plasma interaction modeling system is being developed to predict the interaction of electric propulsion plumes with surfaces. The system, named COLISEUM, is designed to be flexible, usable, and expandable, allowing users to define surfaces with their choice of off-the-shelf 3-D solid modeling packages. These surfaces are then loaded into COLISEUM which performs plasma operations based on user commands. Functional modules are interchangeable, and can range from simple ... |
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| Initial Use of a 3-D Plasma Simulation System for Predicting Surface Sputtering and Contamination by Hall Thrusters |
MAY 2002 |
9 pages |
| Authors:
J. M. Fife; M. R. Gibbons; D. B. VanGilder; D. E. Kirtley; AIR FORCE RESEARCH LAB EDWARDS AFB CA SPACE AND MISSILE PROPULSION DIV
|
| A 3-D Plasma Interaction Modeling System is being developed to predict the interaction of electric propulsion plumes with surfaces. The system, named COLISEUM, is designed to be flexible, usable, and expandable, allowing users to define surfaces with their choice of off-the-shelf 3-D solid modeling packages. These surfaces are then loaded into COLISEUM, which performs plasma operations based on user commands. Functional modules are interchangeable, and can range from simple (prescribed ... |
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| Architecture and Initial Results of a 3-D Plasma Simulation System for Spacecraft-Thruster Interaction Assessment |
13 MAR 2002 |
10 pages |
| Authors:
J. M. Fife; M. R. Gibbons; D. B. VanGilder; D. E. Kirtley; AIR FORCE RESEARCH LAB EDWARDS AFB CA SPACE AND MISSILE PROPULSION DIV
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| A 3-D Plasma Interaction Modeling System (PIMS) is being developed to predict the interaction of electric propulsion plumes with surfaces. The system is designed to be flexible, usable, and expandable, allowing users to define and mesh surfaces with their choice of off-the-shelf 3-D solid modeling packages. These surfaces are then loaded into PIMS, which performs plasma operations based on user commands. Functional PIMS modules will range from simple (prescribed plume ... |
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| A Comparison of Sputtering Models for Plasma-Surface Interactions |
18 JUN 2000 |
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| Authors:
D. B. VanGilder; D. E. Kirtley; J. M. Fife; M. R. Gibbons; AIR FORCE RESEARCH LAB EDWARDS AFB CA PROPULSION DIRECTORATE WEST
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 | The interaction of electric propulsion plumes with spacecraft surfaces is studied in order to predict possible spacecraft contamination. For example, ions in the plume may cause surface sputtering and this sputtered material may be deposited on other surfaces. Several models exist for the sputtering of surface material by ion bombardment based on various experimental data. These models depend on the ion species and materials from the data. In order to ... |
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| Evaluation of a Gridded Ionization Chamber for the Detection of Radioactive Noble Gases |
MAR 84 |
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| Authors:
M. R. Gibbons; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING
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| This thesis investigates the feasibility of quantifying the constitutes of a radioactive noble gas sample with a liquid noble gas gridded ionization chamber, Xenon-131m and zenon-133 are the noble gases used to test the chamber. Several other sources are used to characterize other aspects of the chamber. THe chamber is designed to hold the liquid noble gas between the cathode and the grid while vapor remains between the anode and ... |
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