Table 1: Various discharge conditions: C-bank capacity (in $\mu$ F), U-bank voltage (in kV), H-plasma length (in cm), $\Phi$ -tube diameter (in mm), P-filling pressure (in Pa). $N^{\rm exp}$ (in 10 $^{\rm 22}$ m $^{\rm -3}$ ) and $T^{\rm exp}$ (in 10 $^{\rm 3}$ K) denote experimental electron density and temperature, respectively obtained at a moment when the line profiles were analyzed. $N^{\rm D}$ (in 10 $^{\rm 22}$ m $^{\rm -3}$ ) and $T^{\rm D}$ (in 10 $^{\rm 3}$ K) represent averaged electron density and averaged electron temperature obtained by using our line deconvolution procedure (Milosavljevic & Poparic 2001).
Working gases Exp. C U H $\Phi$ P $N^{\rm exp}$ $N^{\rm D}$ $T^{\rm exp}$ $T^{\rm D}$

72% Ar + 28% He a 14 1.5 7.2 5 133 $6.7~\pm$ 7% $6.9~\pm$ 12% $15.6~\pm$ 11% $15.8~\pm$ 12%

97% Ar + 3% H₂ b 14 1.5 7.2 5 67 $7.0~\pm$ 7% $7.3~\pm$ 12% $16.0~\pm$ 11% $16.2~\pm$ 12%

97% Ar + 3% H₂ c 14 1.5 7.2 5 133 $7.1~\pm$ 7% $7.4~\pm$ 12% $16.2~\pm$ 11% $16.5~\pm$ 12%

**Table 1:** Various discharge conditions: C-bank capacity (in $\mu$ F), U-bank voltage (in kV), H-plasma length (in cm), $\Phi$ -tube diameter (in mm), P-filling pressure (in Pa). $N^{\rm exp}$ (in 10 $^{\rm 22}$ m $^{\rm -3}$ ) and $T^{\rm exp}$ (in 10 $^{\rm 3}$ K) denote experimental electron density and temperature, respectively obtained at a moment when the line profiles were analyzed. $N^{\rm D}$ (in 10 $^{\rm 22}$ m $^{\rm -3}$ ) and $T^{\rm D}$ (in 10 $^{\rm 3}$ K) represent averaged electron density and averaged electron temperature obtained by using our line deconvolution procedure (Milosavljevic & Poparic 2001).
Working gases	Exp.	C	U	H	$\Phi$	P	$N^{\rm exp}$	$N^{\rm D}$	$T^{\rm exp}$	$T^{\rm D}$
72% Ar + 28% He	a	14	1.5	7.2	5	133	$6.7~\pm$ 7%	$6.9~\pm$ 12%	$15.6~\pm$ 11%	$15.8~\pm$ 12%
97% Ar + 3% H₂	b	14	1.5	7.2	5	67	$7.0~\pm$ 7%	$7.3~\pm$ 12%	$16.0~\pm$ 11%	$16.2~\pm$ 12%
97% Ar + 3% H₂	c	14	1.5	7.2	5	133	$7.1~\pm$ 7%	$7.4~\pm$ 12%	$16.2~\pm$ 11%	$16.5~\pm$ 12%

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