Laser-Induced Optical Breakdown in Methane: Diagnostic Using H-Gamma Line Broadening

Table 1

Measured H-alpha widths.

𝑡delay [𝜇s]	2.7×10^5 Pa:	6.5×10^5 Pa:
	width [nm]	width [nm]
0.4	2.8 ± 0.3	2.7 ± 0.3
0.5	2.4 ± 0.3	2.3 ± 0.3
0.6	2.1 ± 0.3	2.1 ± 0.3
0.7	1.9 ± 0.2	1.9 ± 0.2
0.8	1.7 ± 0.2	1.7 ± 0.2
0.9	1.6 ± 0.2	1.5 ± 0.2
1.0	1.4 ± 0.2	1.4 ± 0.2
1.1	1.3 ± 0.2	1.3 ± 0.2
1.2	1.2 ± 0.1	1.2 ± 0.2
1.3	1.1 ± 0.1	1.1 ± 0.1
1.4	1.0 ± 0.1	1.0 ± 0.1
1.5	1.0 ± 0.1	0.92 ± 0.1
1.6	0.89 ± 0.1	0.87 ± 0.1
1.7	0.86 ± 0.1	0.78 ± 0.1
1.8	0.79 ± 0.1	0.77 ± 0.1
1.9	0.77 ± 0.1	0.69 ± 0.1
2.0	0.73 ± 0.1	0.67 ± 0.1
2.1	0.70 ± 0.1	0.61 ± 0.1