The origin of the long time correlations of the density fluctuations
Using a single Langmuir probe located 4.6 cm away from the last closed flux surface in the Scrape Off Layer of Tore Supra, we show that a fraction of intermittent density bursts detected by the probe are grouped in packs. In such packs, typically 3 to 4 bursts are separated by time intervals smaller than the mean separation time. This results is obtained by cross correlating the magnitude bursts selected by a threshold method with the delay time between them The long tail above 40 mu s, extending almost to 100 mu sthat is observed on the auto-correlation function of the density fluctuations is found to be due to the temporal correlation between the individual bursts within their pack.
Bibliographic Reference: An oral paper given at: 32nd EPS Conference on Controlled Fusion and Plasma Physics Organised by: The Laboratorio Nacional de Fusión, Madrid (ES) Held at: Congress Palace of Tarragona, Taragona (ES)
Availability: Available from Association EURATOM-CEA, Département de Recherches sur la Fusion Contrôlée, CEA Cadarache, F-13108 St Paul-Lez-Durance, France Tel: (+33) 4 42 25 70 01; Fax: (+33) 4 42 25 64 21 E-mail: email@example.com
Record Number: 200518359 / Last updated on: 2005-10-04
Original language: en
Available languages: en