Figure 3

(a) Electron density \(n_{\textrm{e}}\) map. Note that different spatial scales in y and z directions. (b) Electron temperature \(T_{\textrm{e}}\) map. Electron heating is corrected. (c) Axial \(n_{\textrm{e}}\) and \(T_{\textrm{e}}\) distributions along the center of the filament at \(y\,=\,1.182\) mm (along the white dotted line in (a)). (d) Radial \(n_{\textrm{e}}\) distributions at \(z\,=\,15\), 20, 25, and 30 mm. Fit curves in Gaussian are overlapped. When fitting, the points with the cross marks are excluded. (e) Radial \(T_{\textrm{e}}\) distributions at \(z\,=\,15\), 20, 25, and 30 mm.