DIII-D disruption experiment results

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Tokamak discharges are frequently ended by disruptions, an instability leading to a very sudden termination of the plasma. Although numerous studies of disruptions have been made, critical data is still needed to develop theoretical models for fundamental aspects of the disruption. This paper describes simultaneous profile measurements of the current, temperature, and density during the disruptive phase of a beam heated single-null divertor discharge in the DIII-D tokamak. The stored energy is lost early in the first phase of the disruption (thermal quench) after which the central temperature is a few hundred eV, and following the start of the current ... continued below

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4 p.

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Taylor, P. L.; Kellman, A. G. & Rice, B. W. July 1995.

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Description

Tokamak discharges are frequently ended by disruptions, an instability leading to a very sudden termination of the plasma. Although numerous studies of disruptions have been made, critical data is still needed to develop theoretical models for fundamental aspects of the disruption. This paper describes simultaneous profile measurements of the current, temperature, and density during the disruptive phase of a beam heated single-null divertor discharge in the DIII-D tokamak. The stored energy is lost early in the first phase of the disruption (thermal quench) after which the central temperature is a few hundred eV, and following the start of the current decay (current quench) the temperature has fallen to 100 eV. The current profile measured using the Motional Stark Effect (MSE) diagnostic is observed to flatten rapidly (< 1 ms) at the final stage of the 10 ms thermal quench and just prior to the start of the current quench in radiative collapse disruptions. The density profile peaks at the edge during the disruption.

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4 p.

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INIS; OSTI as DE96005593

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  • 22. European conference on controlled fusion and plasma physics, Bournemouth (United Kingdom), 2-7 Jul 1995

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  • Other: DE96005593
  • Report No.: GA--A22082
  • Report No.: CONF-950704--20
  • Grant Number: AC03-89ER51114;AC04-94AL85000;W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 195740
  • Archival Resource Key: ark:/67531/metadc667099

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  • July 1995

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  • June 29, 2015, 9:42 p.m.

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  • April 18, 2016, 4:40 p.m.

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Taylor, P. L.; Kellman, A. G. & Rice, B. W. DIII-D disruption experiment results, article, July 1995; San Diego, California. (digital.library.unt.edu/ark:/67531/metadc667099/: accessed September 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.