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Abstract

IN THE TFR TOKAMAK, BURSTS OF DENSITY FLUCTUATIONS ARE OBSERVED, LOCALIZED IN SPACE AND TIME, SYNCHRONOUSLY WITH THE SAWTOOTH DISRUPTIONS OF THE PLASMA. THE CARBON DIOXIDE LASER SCATTERING EXPERIMENT IS DESCRIBED, TOGETHER WITH THE SOFT X-RAY DIAGNOSTIC APPARATUS. THE TEMPORAL EVOLUTION OF THE SPECIFIC TURBULENCE ASSOCIATED WITH THE CRASH OF THE SAWTOOTH IS ANALYSED. THE DISPERSIVE PROPERTIES (FREQUENCY AND WAVE NUMBER) AND SPATIAL LOCALIZATION AND AMPLITUDE DATA ARE INVESTIGATED. THESE OBSERVATIONS DEMONSTRATE THE EXISTENCE OF A SPECIFIC TURBULENCE IN THE DISRUPTION PHENOMENON. AN M=1 KINK-LIKE INSTABILITY AND SPECIFIC TURBULENCE ASSOCIATED WITH THE NEW HELICAL SHAPE OF THE PLASMA ARE TWO EXPERTALLY PROVED ASPECTS OF THE SAWTOOTH RELAXATION PHENOMENON AND PROBABLY TWO KEY ELEMENTS OF ITS MECHANISM.

Additional information

Authors: ANDREOLETTI J, CEA, CEN, F;OLIVAIN J, CEA, CEN, F;TRUC A, CEA, CEN, F;GERVAIS F, CEA, CEN, F;QUEMENEUR A, CEA, CEN, F;GRESILLON D CEA, CEN, F, CEA, CEN, F
Bibliographic Reference: REPORT EUR-CEA-FC-1336 E, 1988, AVAILABILITY: CEA, CEN, CADARACHE, F
Availability: Can be ordered online
Record Number: 1989126228900 / Last updated on: 1989-04-01
Category: PUBLICATION
Available languages: en