TY  - GEN
AU  - Amal Abd El fattah omer khedr
AU  - Hisham Imam , 
AU  - Mohamed Abd El Harith Mohamed , 
AU  - Salah Hassab Elnabi , 
TI  - Enhancement of the performance of libs technique adopting double pulse configuration for silicon analysis / 
PY  - 2006///
CY  - Cairo : 
PB  - Amal Abd El fattah omer khedr , 
KW  - double pulse
KW  - silicon
N1  - Thesis (M.Sc.) - Cairo University - National Institute Of Laser Enhanced Sciences - Department Of Laser Application In Physics; Issued also as CD
N2  - A comparative study between single and double pulse - laser induced breakdown spectroscopy (LIBS) was performed on n - type silicon (111) targetA new mobile double pulse Nd : YAG laser at 1064 nm was used throughout the measurementsThe experiment was carried out in two ambient gases ; air and argon at different pressures of 07 , 470 and 1000 hPa in air and 470 and 1000 hPa in argonThe ambient gas interacts with the laser beam and the plume , several mechanisms are involved in these interactions , such as , plasma shielding , shock wave production and plasma expansionPlasma shielding effect reduces laser - material coupling efficiencyHowever , the induced shock waves increase the coupling efficiency in case of double pulse LIBS
UR  - http://172.23.153.220/th.pdf
ER  -