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Title: Internal probe array for the measurement of radial electric field

Abstract

A multipoint radial electric field probe, paired with a Langmuir triple probe has been operated on a RF sustained field reversed configuration. Langmuir probe measurements confirm the approximation that Te(r){approx}constant, allowing for simpler interpretation of the floating potential, and the probe array was implemented with nonemissive, floating probes. Due to the large antenna potentials (multi-kilovolts), the electric field probe was designed taking advantage of the development of inexpensive, multichannel, portable digital storage oscilloscopes. This also made it possible to operate the internal plasma diagnostic with a minimum of electrical design work and fewer calibration issues. The diagnostic was electrically isolated (floated) separate from experiment ground, and has been used to measure transient electric fields as large as 2.5 kV/m.

Authors:
;  [1]
  1. University of Washington, Aeronautics and Astronautics, Seattle, Washington 98105 (United States)
Publication Date:
OSTI Identifier:
20641300
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 75; Journal Issue: 10; Conference: 15. topical conference on high temperature plasma diagnostics, San Diego, CA (United States), 19-22 Apr 2004; Other Information: DOI: 10.1063/1.1794847; (c) 2004 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; ANTENNAS; CALIBRATION; ELECTRIC FIELDS; FIELD-REVERSED THETA PINCH DEVICES; LANGMUIR PROBE; PLASMA; REVERSE-FIELD PINCH; REVERSED-FIELD PINCH DEVICES

Citation Formats

Andreason, Samuel P, and Slough, John T. Internal probe array for the measurement of radial electric field. United States: N. p., 2004. Web. doi:10.1063/1.1794847.
Andreason, Samuel P, & Slough, John T. Internal probe array for the measurement of radial electric field. United States. https://doi.org/10.1063/1.1794847
Andreason, Samuel P, and Slough, John T. 2004. "Internal probe array for the measurement of radial electric field". United States. https://doi.org/10.1063/1.1794847.
@article{osti_20641300,
title = {Internal probe array for the measurement of radial electric field},
author = {Andreason, Samuel P and Slough, John T},
abstractNote = {A multipoint radial electric field probe, paired with a Langmuir triple probe has been operated on a RF sustained field reversed configuration. Langmuir probe measurements confirm the approximation that Te(r){approx}constant, allowing for simpler interpretation of the floating potential, and the probe array was implemented with nonemissive, floating probes. Due to the large antenna potentials (multi-kilovolts), the electric field probe was designed taking advantage of the development of inexpensive, multichannel, portable digital storage oscilloscopes. This also made it possible to operate the internal plasma diagnostic with a minimum of electrical design work and fewer calibration issues. The diagnostic was electrically isolated (floated) separate from experiment ground, and has been used to measure transient electric fields as large as 2.5 kV/m.},
doi = {10.1063/1.1794847},
url = {https://www.osti.gov/biblio/20641300}, journal = {Review of Scientific Instruments},
issn = {0034-6748},
number = 10,
volume = 75,
place = {United States},
year = {Fri Oct 01 00:00:00 EDT 2004},
month = {Fri Oct 01 00:00:00 EDT 2004}
}