Measurement and scaling of he radial correlation lengths of turbulence at the plasma edge of ASDEX Upgrade
With the single frequency swept reflectometry diagnostic on ASDEX Upgrade radial correlation lengths of the plasma turbulence can be determined by a new quasi-simultaneous correlation technique. The scaling of the observed microturbulence is investigated in detail through the correlation lengths measured 2cm inside the separatrix. During the low-temperature L-mode and near the L-H transition these scale according to the resistive ballooning turbulence model. For L- and H-mode plasmas with higher temperatures the correlation length scale with the effective Larmour radius as expected for dominantly ni driven turbulence.
Bibliographic Reference: Article: Plasma Physics and Controlled Fusion, 42 (2000), 237-253
Record Number: 200011978 / Last updated on: 2000-05-12
Original language: en
Available languages: en