Triple Langmuir probe calibration in TOMAS ECRH plasma

In the TOMAS device, a triple Langmuir probe is used to measure electron temperature and density. The accuracy of this measurement depends on correct determination effective collecting area probe, which complex plasma transport processes. can be calibrated by cyclotron resonance heating experiments using cut-off density ordinary wave (O-wave). This threshold only frequency injected wave, occurrence phenomenon clearly visible in evolution. value consequently known at point calibrate measurements probe.