دراسة الغازات باستخدام الاثر الصوت ضوىي بالتزامن مع مقياس تداخل مايكلسون

الموضوعات

علوم تطبيقية وتكنولوجية

روابط وملفات

التعريف والنوع

رقم الوثيقة

ff07bfcb-987e-4dfb-bad9-74182e5f7766

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل ماجيستير

نوع الملف

pdf text

أسماء الملفات

1696670_1.pdf

بيانات النشر

ترجمة العنوان

Gas Detection Using Photoacoustic Effect in Conjunction with Michelson Interferometer

ألقاب المؤلفين

[{"name_ar":"أحمد سيف الدين امين جبر","title_ar":"اعداد","title_en":"Preparation"},{"name_ar":"محمد ابو طه","title_ar":"اشراف","title_en":"Supervision"}]

اللغة

Arabic

المصدر والدورية

اسم المصدر

دراسة الغازات باستخدام الاثر الصوت ضوىي بالتزامن مع مقياس تداخل مايكلسون

المحتوى والصفحات

عدد الصفحات

0

ترجمة الملخص

AbstractIn this study, and for the first time in the history of spectroscopy, photoacoustic signals were detected inside Michelson interferometer cavity. The system of investigation was built up by the researcher, and the first run of the system was launched in September, 2008. Data werecollected in November, 2008 through the end of January, 2009.The main item of this thesis deals with trace gas detection using the photoacoustic (PA) effect in conjunction with Michelson interferometer in a trial to figure out a relation between the photoacoustic and the Michelson fringe signals. The photoacoustic signal was successfully detected –for the first time –inside Michelson interferometer cavity. For this purpose, a set of samples were investigated for trace gas emission among which chlorophorm was used to test the reliability and stability of the constructed system, while other samples, like essential oils andplant tissues were used to figure out a relation between both signals.The main goals of this thesis involve the ability of detecting the PA signals inside Michelson interferometer cavity and to try figuring out a relation between PA and Michelson fringe signals by comparing both signals with each other. The sensitivity of both detection techniques subject to IR absorption was investigated. This thesis also aimed to building up a new detection technique based on the combined Michelson-PA chamber in which, laser irradiation was replaced by a wideband-pulsed IR source in a trial to improve system's portability and to judge the sensitivity of both detection techniques subject to IR absorption.In the presented study, common experimental procedure has been followed. The constructed system was investigated many times and at different dates using the same amount of chlorophorm and the same results were observed. The constructed system was tested and investigated under different experimental conditions and optimizing parameters using different samples of chlorophorm. The reliability of the system was investigated using different samples of essential oils along with the part of the plant from where these essential oils are usually extracted. Both investigation techniques, Michelson interferometry and PA spectroscopy, have shown good correlations between the signals of the plant tissue and it's corresponding oil. The new introduced system was also used to compare the trace gas of tap water with that of Zamzam water in a trial to investigate the detectability of the system to minute changes in the sample.PA signals have been studied for the first timeinside the cavity of Michelson interferometer and were successfully detected. PA and Michelson fringe signals have shown good correlations compared with each other. The combined Michelson-PA chamber technique has shown an edge over conventional PAS, and has demonstrated a higher sensitivity of Michelson interferometry compared with PA spectroscopy subject to IR absorption. Results were encouraging and so, opens the door widely to use this new introduced investigation technique in different manners and criteria regarding trace gas emission.

إشراف وإعداد

الإشراف

محمد ابو طه

الإعداد

أحمد سيف الدين امين جبر

الاقتباسات الببليوغرافية