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Title: Computer simulation of three-dimensional heavy ion beam trajectory imaging techniques used for magnetic field estimation

Abstract

A magnetic field mapping technique via heavy ion beam trajectory imaging is being developed on the Madison Symmetric Torus reversed field pinch. This paper describes the computational tools created to model camera images of the light emitted from a simulated ion beam, reconstruct a three-dimensional trajectory, and estimate the accuracy of the reconstruction. First, a computer model is used to create images of the torus interior from any candidate camera location. It is used to explore the visual field of the camera and thus to guide camera parameters and placement. Second, it is shown that a three-dimensional ion beam trajectory can be recovered from a pair of perspectively projected trajectory images. The reconstruction considers effects due to finite beam size, nonuniform beam current density, and image background noise. Third, it is demonstrated that the trajectory reconstructed from camera images can help compute magnetic field profiles, and might be used as an additional constraint to an equilibrium reconstruction code, such as MSTFit.

Authors:
; ; ; ;  [1]
  1. ECSE Department, Rensselaer Polytechnic Institute, Troy, New York, 12180 (United States)
Publication Date:
OSTI Identifier:
21024586
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 78; Journal Issue: 11; Other Information: DOI: 10.1063/1.2804108; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0034-6748
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; BACKGROUND NOISE; BEAM CURRENTS; CAMERAS; COMPUTERIZED SIMULATION; CURRENT DENSITY; HEAVY IONS; IMAGES; ION BEAMS; MAGNETIC FIELDS; PLASMA DIAGNOSTICS; PLASMA SIMULATION; REVERSE-FIELD PINCH; REVERSED-FIELD PINCH DEVICES; THREE-DIMENSIONAL CALCULATIONS; TRAJECTORIES

Citation Formats

Ling, C, Connor, K A, Demers, D R, Radke, R J, and Schoch, P M. Computer simulation of three-dimensional heavy ion beam trajectory imaging techniques used for magnetic field estimation. United States: N. p., 2007. Web. doi:10.1063/1.2804108.
Ling, C, Connor, K A, Demers, D R, Radke, R J, & Schoch, P M. Computer simulation of three-dimensional heavy ion beam trajectory imaging techniques used for magnetic field estimation. United States. https://doi.org/10.1063/1.2804108
Ling, C, Connor, K A, Demers, D R, Radke, R J, and Schoch, P M. 2007. "Computer simulation of three-dimensional heavy ion beam trajectory imaging techniques used for magnetic field estimation". United States. https://doi.org/10.1063/1.2804108.
@article{osti_21024586,
title = {Computer simulation of three-dimensional heavy ion beam trajectory imaging techniques used for magnetic field estimation},
author = {Ling, C and Connor, K A and Demers, D R and Radke, R J and Schoch, P M},
abstractNote = {A magnetic field mapping technique via heavy ion beam trajectory imaging is being developed on the Madison Symmetric Torus reversed field pinch. This paper describes the computational tools created to model camera images of the light emitted from a simulated ion beam, reconstruct a three-dimensional trajectory, and estimate the accuracy of the reconstruction. First, a computer model is used to create images of the torus interior from any candidate camera location. It is used to explore the visual field of the camera and thus to guide camera parameters and placement. Second, it is shown that a three-dimensional ion beam trajectory can be recovered from a pair of perspectively projected trajectory images. The reconstruction considers effects due to finite beam size, nonuniform beam current density, and image background noise. Third, it is demonstrated that the trajectory reconstructed from camera images can help compute magnetic field profiles, and might be used as an additional constraint to an equilibrium reconstruction code, such as MSTFit.},
doi = {10.1063/1.2804108},
url = {https://www.osti.gov/biblio/21024586}, journal = {Review of Scientific Instruments},
issn = {0034-6748},
number = 11,
volume = 78,
place = {United States},
year = {Thu Nov 15 00:00:00 EST 2007},
month = {Thu Nov 15 00:00:00 EST 2007}
}