Figure 12From: In situ erosion measurement tools for electric propulsion thrusters: triangular laser head and telemicroscopeGrid curvature versus operation time for the warm-up phase (red triangles) and cool-down phase (blue circles) of the RIT-22. Before switching the beam on, the plasma was burning for about 2 hours. (Thruster power level: 1.25 kW)Back to article page