NDLI: Magnetic fluctuations in CASTOR tokamak and their relationship with the electrostatic fluctuations

Content Provider	IEEE Xplore Digital Library
Author	Dhyani, V. Jakubka, K. Stockel, J. Zacek, F.
Copyright Year	1996
Description	Author affiliation: Inst. of Plasma Phys., Acad. of Sci., Prague, Czech Republic (Dhyani, V.)
Abstract	Summary form only given. The magnetic fluctuations are monitored in radial and poloidal directions deep (upto r/a=0.4) into the CASTOR tokamak and their relationship with electrostatic fluctuations is studied. For performing the experiments CASTOR was operated with: R=0.40 m, a=0.085 m, B/sub T/=1 T, I/sub p/=12 kA and n~/sub e//spl les/10/sup 19/ m/sup -3/. A set of eight magnetic probes (all of them 4 mm in length and 4 mm in diameter), with all the probes registering the radial component of the magnetic field and radially spaced on each other, is constructed to study the radial magnetic field fluctuations (B~r). With this set the whole radial profile from r/a=1 to r/a=0.4 could be achieved for each shot. The radial correlation length and propagation velocity of B~r are computed. For further diagnosing the relation between the magnetic and electrostatic fluctuations a new experiment has been conceptualised. A rogowski coil has been constructed and a Langmuir probe is installed in the center of the coil. The rogowski coil has a diameter of 1 cm with 300 number of turns wound on a circular form and a cross section of every turn is 0.00314 cm/sup 2/. The rogowski coil registers the current flowing in the tokamak scrape-off-layer (SOL) region and at the edge. The sensitivity of the coil is sufficiently increased in order to observe the current filaments existing in the tokamak SOL and edge region.
File Size	114777
File Format	PDF
ISBN	0780333225
ISSN	07309244
DOI	10.1109/PLASMA.1996.550744
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1996-06-03
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Fluctuations Tokamaks Electrostatics Probes Magnetic separation Coils Magnetic fields Nuclear and plasma sciences Physics Monitoring
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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