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Langmuir probes as a tool to investigate plasma uniformity in a large negative ion source

Poggi C.; Spolaore M.; Brombin M.; Cavazzana R.; Fadone M.; Pasqualotto R.; Pimazzoni A.; Pomaro N.; Sartori E.; Serianni G.; Taliercio C.

Conference: 29th IEEE Symposium on Fusion Engineering (SOFE-2021), , Virtual Conference , 12-16 December 2021 Year: 2021
ISTP Authors:
Nicola Pomaro
Cesare Taliercio
Gianluigi Serianni
Monica Spolaore
Matteo Brombin
Roberto Pasqualotto

Keywords: , ,
Research Activitie:

The SPIDER experiment is the full size prototype of ITER heating neutral beam. It is equipped with two bi-dimensional arrays of Langmuir probes, covering the Plasma Grid (PG) surface and the Bias Plate (BP). These sets of diagnostics are routinely used during SPIDER operation and allow to investigate the properties of the plasma in the expansion region. The measurements are typically influenced by RF induced source oscillations, and a technique to extract average values is described. The dependencies of plasma parameters on power, pressure, magnetic filter field, plasma grid and bias plate biases are reported and used to assess the uniformity of the plasma, showing the presence of plasma drifts due to the magnetic field.

ID 464793
PRODUCT TYPE Conference Poster
LAST UPDATE 2023-07-04T16:34:10Z