000			02166cam a2200325 a 4500
003			EG-GiCUC
005			20250223031101.0
008			141030s2013 ua dh f m 000 0 eng d
040			_aEG-GiCUC _beng _cEG-GiCUC
041	0		_aeng
049			_aDeposite
097			_aM.Sc
099			_aCai01.24.12.M.Sc.2013.Ah.E
100	0		_aAhmed Barakat Hosseny Barakat
245	1	0	_aEnvironmental gas detection using tunable diode laser / _cAhmed Barakat Hosseny Barakat ; Supervised Yehia Abdelhamid Badr
246	1	5	_aالكشف البيئى على الغارات باستخدام ليزر الديود المولف
260			_aCairo : _bAhmed Barakat Hosseny Barakat , _c2013
300			_a152 P. : _bcharts , facsimiles ; _c25cm
502			_aThesis (M.Sc.) - Cairo University - National Institute of Laser Enhanced - Department Laser Science and Interactions
520			_aGas detection is one of the most important issues especially, concerning monitoring pollution. Many systems were designed for monitoring: CO₂, NOx , SOx , O₃ {u2026}etc. It is amid here to design a single homemade setup for gas detection and compare it with the already existing systems. Four multipass cells are used here one of them designed in this work. Two portable laser source were used in this investigation at 532 nm (2nd harmonic of diode pumped Nd:YAG laser with power of 0-250 mW) and 445 nm high power diode laser 0-1.5 watt. Four gases were involved in the present work, NO₂, SO₂, CO₂and smoke of cigarette.NO₂ showed the best results in our investigations. We used in our investigation for detection Acton double monochromator (Acton spectrapro-500i), thorlab spectrometer (CCS100 - Compact Spectrometer, 350 - 700 nm) in addition to fast photo-diode thorlab(DET210 - HIGH-SPEED SILICON DETECTOR) provided with digital storage oscilloscope
530			_aIssued also as CD
653		4	_aGas detection
653		4	_aLaser Spectroscopy
653		4	_aTunable diode laser
700	0		_aYehia Abdelhamid Badr , _eSupervisor
856			_uhttp://172.23.153.220/th.pdf
905			_aAml _eCataloger
905			_aNazla _eRevisor
942			_2ddc _cTH
999			_c48048 _d48048