skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Biasing, Acquisition and Interpretation of a Dense Langmuir Probe Array in NSTX

Abstract

A dense array of 99 Langmuir probes has been installed in the lower divertor region of the National Spherical Torus Experiments (NSTX). This array is instrumented with a system of elec- tronics that allows flexibility in the choice of probes to bias as well as the type of measurement (including standard swept, single probe, triple probe and operation as passive floating potential and scrape-off-layer (SOL) current monitors). The use of flush-mounted probes requires careful inter- pretation. The time dependent nature of the SOL makes swept-probe traces difficult to interpret. To overcome these challenges, the single- and triple-Langmuir probe signals are used in comple- mentary fashion to determine the temperature and density at the probe location. A comparison to mid-plane measurements is made. Work is supported by DOE contracts DE-AC02-09CHI1466 and DE-PS02-07ER07-29.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
988892
Report Number(s):
PPPL-4552
TRN: US1007438
DOE Contract Number:  
DE-AC02-09CH11466
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; DIVERTORS; FLEXIBILITY; LANGMUIR PROBE; MONITORS; PROBES; SOLS; NSTX

Citation Formats

Jaworski, M. A., Kallman, J., Kaita, R., Kugel, H., LeBlanc, B., Marsala, R., and Ruzic, D. Biasing, Acquisition and Interpretation of a Dense Langmuir Probe Array in NSTX. United States: N. p., 2010. Web. doi:10.2172/988892.
Jaworski, M. A., Kallman, J., Kaita, R., Kugel, H., LeBlanc, B., Marsala, R., & Ruzic, D. Biasing, Acquisition and Interpretation of a Dense Langmuir Probe Array in NSTX. United States. doi:10.2172/988892.
Jaworski, M. A., Kallman, J., Kaita, R., Kugel, H., LeBlanc, B., Marsala, R., and Ruzic, D. Wed . "Biasing, Acquisition and Interpretation of a Dense Langmuir Probe Array in NSTX". United States. doi:10.2172/988892. https://www.osti.gov/servlets/purl/988892.
@article{osti_988892,
title = {Biasing, Acquisition and Interpretation of a Dense Langmuir Probe Array in NSTX},
author = {Jaworski, M. A. and Kallman, J. and Kaita, R. and Kugel, H. and LeBlanc, B. and Marsala, R. and Ruzic, D.},
abstractNote = {A dense array of 99 Langmuir probes has been installed in the lower divertor region of the National Spherical Torus Experiments (NSTX). This array is instrumented with a system of elec- tronics that allows flexibility in the choice of probes to bias as well as the type of measurement (including standard swept, single probe, triple probe and operation as passive floating potential and scrape-off-layer (SOL) current monitors). The use of flush-mounted probes requires careful inter- pretation. The time dependent nature of the SOL makes swept-probe traces difficult to interpret. To overcome these challenges, the single- and triple-Langmuir probe signals are used in comple- mentary fashion to determine the temperature and density at the probe location. A comparison to mid-plane measurements is made. Work is supported by DOE contracts DE-AC02-09CHI1466 and DE-PS02-07ER07-29.},
doi = {10.2172/988892},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Sep 22 00:00:00 EDT 2010},
month = {Wed Sep 22 00:00:00 EDT 2010}
}

Technical Report:

Save / Share: