NDLI: Enhanced confinement in the MST reversed-field pinch

Content Provider	IEEE Xplore Digital Library
Author	Chapman, B.E. Cekic, M. Den Hartog, D.J. Holly, D. Prager, S.C. Sarff, J.S.
Copyright Year	1995
Description	Author affiliation: Dept. of Phys., Wisconsin Univ., Madison, WI, USA (Chapman, B.E.; Cekic, M.; Den Hartog, D.J.; Holly, D.; Prager, S.C.; Sarff, J.S.)
Abstract	Summary form only given. The Madison Symmetric Torus (MST) reversed-field pinch is a toroidal, ohmically-heated, magnetic fusion research device capable of plasma currents of I 700 kA and plasma temperatures of several hundred eV. Recent MST discharges have exhibited energy confinement times, /spl tau//sub E/, that are 2-3 times greater than normal. An important benchmark of the MST's performance, /spl tau//sub E/=(total plasma energy)/(input ohmic heating power) and is about 1 ms in normal discharges. /spl tau//sub E/ is limited by transport of energy and particles out of the plasma core due primarily to fluctuations in the structure and magnitude of the internal magnetic field. The dominant magnetic fluctuations are sawtooth events, so-named for the shape of their waveform in many plasma parameters. Sawteeth arise due to overpeaking of the current-density profile on the magnetic axis. During each sawtooth, the total plasma energy decreases, and the ohmic heating power increases, resulting in a sharp drop in /spl tau//sub E/. Recently, discharges with sawtooth-free periods have been achieved, resulting in enhanced confinement. One method of preventing sawteeth is to actively drive current in the edge plasma. This flattens the normally-peaked current-density profile. The best results with this method have been achieved with careful conditioning by solid-target boronization of the plasma-facing inner wall of the vacuum vessel.
File Size	132285
File Format	PDF
ISBN	0780326695
ISSN	07309244
DOI	10.1109/PLASMA.1995.531703
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-06-05
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Plasma confinement Magnetic confinement Toroidal magnetic fields Plasma temperature Plasma transport processes Plasma waves Heating Fluctuations Magnetic devices Plasma devices
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in