  Intermittent fluctuations in the TCV scrape-off layer have been investigated
by analysing long Langmuir probe data time series under stationary conditions,
allowing calculation of fluctuation statistics with high accuracy. The ion
saturation current signal is dominated by the frequent occurrence of
large-amplitude bursts attributed to filament structures moving through the
scrape-off layer. The average burst shape is well described by a
double-exponential wave-form with constant duration, while the waiting times
and peak amplitudes of the bursts both have an exponential distribution.
Associated with bursts in the ion saturation current is a dipole shaped
floating potential structure and radially outwards directed electric drift
velocity and particle flux, with average peak values increasing with the
saturation current burst amplitude. The floating potential fluctuations have a
normal probability density function while the distributions for the ion
saturation current and estimated radial velocity have exponential tails for
large fluctuations. These findings are discussed in the light of prevailing
theories for filament motion and a stochastic model for intermittent scrape-off
layer plasma fluctuations.
