Fitting of the Thomson scattering density and temperature profiles on the COMPASS tokamak

• A new technique for fitting the full radial profiles of electron density and temperature obtained by the Thomson scattering diagnostic in H-mode discharges on the COMPASS tokamak is described. The technique combines the conventionally used modified hyperbolic tangent function for the edge transport barrier (pedestal) fitting and a modification of a Gaussian function for fitting the core plasma. Low number of parameters of this combined function and their straightforward interpretability and controllability provide a robust method for obtaining physically reasonable profile fits. Deconvolution with the diagnostic instrument function is applied on the profile fit, taking into account the dependence on the actual magnetic configuration.

Subject headings

NATURVETENSKAP  -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)

Keyword

Light scattering

Magnetoplasma

Tokamak devices

Combined functions

Edge transport barriers

Gaussian functions

Hyperbolic tangent function

Instrument functions

Magnetic configuration

Temperature profiles

Thomson scattering diagnostics

Hyperbolic functions

human

human tissue

plasma

Publication and Content Type

ref (subject category)

art (subject category)