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Title: Analysis of disruptive instabilities in Aditya tokamak discharges
Authors: Chattopadhyay, Asim Kumar
Anand, Arun
Rao, C V S
Joisa, Shankar
team, Aditya
Keywords: Tokamak;MHD instabilities;Tomography
Issue Date: Nov-2006
Publisher: CSIR
IPC Code: H05H
Abstract: Major disruptions and sawteeth oscillations (internal disruptions) are routinely observed in ohmically heated Aditya tokamak discharges and their characteristics have been investigated with the help of soft X-ray (SXR) tomography along with other diagnostics. The SXR tomography is carried out with the help of single array of detectors assuming rigid rotation of the modes to analyse the mode structure of sawtooth internal disruptions. Coupling of m/n=2/1 and m/n=1/1 modes could be the main mechanism for the major disruption. Sawteeth periods were measured and compared with the scaling laws and found to be in good agreement.
Page(s): 826-833
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.44(11) [November 2006]

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