| 000 | 03689cam a2200337 a 4500 | ||
|---|---|---|---|
| 003 | EG-GiCUC | ||
| 005 | 20250223031601.0 | ||
| 008 | 161022s2016 ua dh f m 000 0 eng d | ||
| 040 |
_aEG-GiCUC _beng _cEG-GiCUC |
||
| 041 | 0 | _aeng | |
| 049 | _aDeposite | ||
| 097 | _aM.Sc | ||
| 099 | _aCai01.24.05.M.Sc.2016.Ra.S | ||
| 100 | 0 | _aRaghda Mohamed Hosny Mohamed Salah Eldin Elsaeid | |
| 245 | 1 | 0 |
_aStudy of physical and analytical libs parameters of some metallic targets under extreme conditions / _cRaghda Mohamed Hosny Mohamed Salah Eldin Elsaeid ; Supervised Mohamed Abdelharith Mohamed , Mahmoud Abdelhamid Ahmed |
| 246 | 1 | 5 | _aدرا{uئإآ٣}{uئإ٩٤} ا{uئإؤئ}{uئإأأ}{uئإإإ}ا{uئإإ٣}{uئإؤإ} ا{uئإؤئ}{uئإؤ٤}{uئآئئ}{uئإآ٠}{uئآئإ}{uئإ٨إ}{uئإ٨آ}{uئآئئ}{uئآءآ} وا{uئإؤئ}{uئإ٩٨}{uئإء٤}{uئإإ٠}{uئآئئ}{uئإإ٠}{uئآئئ}{uئآءآ} {uئإؤئ}{uئإئء}{uئإإ٧}{uئآءؤ}{uئآئئ}{uئإ٨إ}ر ا{uئإؤئ}{uئإأ٤}{uئآئئ}{uئإؤ٤}{uئإئ٠} ا{uئإؤئ}{uئإإ٤}{uئإآ٤}{uئإ٩٨}{uئإء٤}{uئإ٩ء} {uئإ٩١}{uئإ٨إ}{uئإؤئ}{uئإإ٠}{uئآئئ}{uئإآ٠}ر {uئإؤئ}{uئإ٩٢}{uئإأأ}{uئإآإ} ا{uئإؤئ}{uئإإ٤}{uئإأأ}{uئإ٨إ}دن {uئإؤ٣}{uئإئ٠} ظ{uئإؤإ} ظ{uئإءإ}وف {uئإؤ٧}{uئإ٨إ}{uئإآ٣}{uئآئئ}{uئإ٩٤} |
| 260 |
_aCairo : _bRaghda Mohamed Hosny Mohamed Salah Eldin Elsaeid , _c2016 |
||
| 300 |
_a112 , 7 P. : _bcharts , facsimiles ; _c25cm |
||
| 502 | _aThesis (M.Sc.) - Cairo University - National Institute of Laser Enhanced Science - Department of Laser Application in Environmental Metrololgy Photochemistry and Agriculture | ||
| 520 | _aLaser induced breakdown spectroscopy (LIBS) is a well-known analytical technique that is used to determine the elemental composition of various solids, liquids and gases. LIBS analysis of metals at very low temperature is of great interest for industrial, biological and space exploration expeditions applications. In the present work, the effect of very low sample temperature on spectral emission intensity of laser-induced plasma as well as the plasma parameters under both atmospheric pressure and vacuum has been studied. For this purpose the sample has been cooled down to liquid nitrogen (LN) temperature 77K in a special vacuum chamber with a cold finger target holder in its center. Plasma has been produced on bronze alloy sample surface using fundamental wavelength of Nd:YAG laser. The optical emission from the plasma is collected by optical fiber and analyzed by an echelle spectrometer combined with an intensified CCD camera. The integrated intensities of different emission lines for different elements (Cu, Pb, Sn and Zn) have been calculated from the obtained LIBS spectra. Moreover, plasma parameters of bronze alloys (electron number density N and e plasma temperature T ) were investigated at both room and liquid e nitrogen temperatures under atmospheric pressure and vacuum conditions. The results suggest that reducing the sample temperature leads to decrease in the emission line intensities under both environments. Plasma parameters were found to decrease at atmospheric pressure but increased under vacuum conditions | ||
| 530 | _aIssued also as CD | ||
| 653 | 4 | _aExtreme conditions | |
| 653 | 4 | _aMetallic targets | |
| 653 | 4 | _aPhysical and analytical libs | |
| 700 | 0 |
_aMahmoud Abdelhamid Ahmed , _eSupervisor |
|
| 700 | 0 |
_aMohamed Abdel Harith Mohamed , _eSupervisor |
|
| 856 | _uhttp://172.23.153.220/th.pdf | ||
| 905 |
_aNazla _eRevisor |
||
| 905 |
_aShaima _eCataloger |
||
| 942 |
_2ddc _cTH |
||
| 999 |
_c58233 _d58233 |
||