Figure 1 Laser Induced Plasma Spectroscopy (LIBS) system configuration

Figure 2 Emission spectra of laser induced on Si-Al alloy target in air with different laser energies

Figure 3 Boltzman plot for plasma produced on Si: Al alloy target in distilled water with different laser

Figure 4 The variation of (Te) and (ne) versus the laser energy for Si: Al alloy in air

Laser energy (mJ)	Te (eV)	ne*1016 (cm-3)	fp (Hz) *1012	λD *10-5(cm)	ND
300	0.833	34.308	5.260	0.116	2.231
400	0.914	33.720	5.215	0.122	2.586
500	1.080	32.480	5.118	0.135	3.383
600	1.157	31.708	5.057	0.142	3.796
700	1.199	26.758	4.645	0.157	4.362
800	1.193	21.023	4.117	0.177	4.885

Table1 plasma parameters for Si: Al in air with different laser energy