ETUDE D'UNE DECHARGE MICRO-ONDE D'HYDROGENE (EN VUE DU DEPOT DE DIAMANT)

ETUDE D'UNE DECHARGE MICRO-ONDE D'HYDROGENE (EN VUE DU DEPOT DE DIAMANT) PDF Author: LAURENT.. TOMASINI
Publisher:
ISBN:
Category :
Languages : fr
Pages : 157

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Book Description
CE TRAVAIL A CONSISTE EN L'ETUDE EXPERIMENTALE (COUPLEE A UN CODE CINETIQUE) D'UNE DECHARGE MICRO-ONDE (2.45 GHZ) D'HYDROGENE DE PETIT DIAMETRE (8 ET 16 MM) ENTRETENUE PAR ONDE DE SURFACE, EN VUE DE DEPOSER DU DIAMANT PAR PECVD (DEPOT CHIMIQUE EN PHASE GAZEUSE ASSISTE PAR UN PLASMA H#2-CH#4). PLUSIEURS PRECISIONS CONCERNANT LA RECOMBINAISON HETEROGENE DES ATOMES H A LA PAROI DU TUBE A DECHARGE ONT MONTRE SON INFLUENCE CONSIDERABLE SUR LA CINETIQUE DU PLASMA, ET, L'IMPOSSIBILITE DE CONNAITRE PRECISEMENT LA PROBABILITE DE RECOMBINAISON (PARAMETRE D'ENTREE DU CODE AJUSTE AUX MESURES EXPERIMENTALES), DU FAIT DE L'INHOMOGENEITE DE L'ETAT DE SURFACE DU TUBE ; NOUS NE POUVONS ESTIMER QUE DES ORDRES DE GRANDEUR DE CETTE PROBABILITE. POUR CELA, NOUS AVONS UTILISE LA FLUORESCENCE (FIL) ET DE L'EMISSION STIMULEE INDUITES PAR LASER (ESIL). DE PLUS, L'ABSORPTION DU SIGNAL D'ESIL PAR LES ATOMES H(N=2) NOUS A PERMIS DE MESURER LEUR CONCENTRATION (QUELQUES 10#1#1 CM#-#3). L'AMELIORATION DU CODE PASSE AUSSI PAR LA CONNAISSANCE DE LA TEMPERATURE DU GAZ. NOUS AVONS CONSTATE QUE LA TEMPERATURE ROTATIONNELLE EST DIFFERENTE DE CELLE-CI A 1 TORR. DE PLUS, LES MESURES D'ELARGISSEMENT DOPPLER MONTRENT QUE LA TEMPERATURE CINETIQUE DES ATOMES (MESUREE AUSSI PAR FIL) EST SUPERIEURE A CELLE DES MOLECULES: LA DECHARGE EST DONC EN DESEQUILIBRE THERMIQUE. CES TEMPERATURES SONT CONTROLEES PAR LA RELAXATION DES ATOMES H SUR LES MOLECULES H#2, PUIS DES NEUTRES SUR LA PAROI. PLUS LA FRACTION ATOMIQUE EST FAIBLE, PLUS CES TEMPERATURES SONT FAIBLES. ELLES DEPENDENT DONC DES TRANSFERTS ENERGETIQUES A LA PAROI, D'OU LA NECESSITE DE CONTROLER LA TEMPERATURE DE CELLE-CI. CES INFORMATIONS SUR NOTRE DECHARGE MICRO-ONDE D'HYDROGENE DE PETIT DIAMETRE NOUS A PERMIS DE METTRE AU POINT UN REACTEUR (DIATOMEE) DE GRAND DIAMETRE (10 CM) FONCTIONNANT A 915 MHZ, AVEC DE FORTES PUISSANCES (30 KW) ET UN ECOULEMENT DE GAZ EN CIRCUIT FERME (DU FAIT DES FORTS FLUX DE GAZ)

ETUDE D'UNE DECHARGE MICRO-ONDE D'HYDROGENE (EN VUE DU DEPOT DE DIAMANT)

ETUDE D'UNE DECHARGE MICRO-ONDE D'HYDROGENE (EN VUE DU DEPOT DE DIAMANT) PDF Author: LAURENT.. TOMASINI
Publisher:
ISBN:
Category :
Languages : fr
Pages : 157

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Book Description
CE TRAVAIL A CONSISTE EN L'ETUDE EXPERIMENTALE (COUPLEE A UN CODE CINETIQUE) D'UNE DECHARGE MICRO-ONDE (2.45 GHZ) D'HYDROGENE DE PETIT DIAMETRE (8 ET 16 MM) ENTRETENUE PAR ONDE DE SURFACE, EN VUE DE DEPOSER DU DIAMANT PAR PECVD (DEPOT CHIMIQUE EN PHASE GAZEUSE ASSISTE PAR UN PLASMA H#2-CH#4). PLUSIEURS PRECISIONS CONCERNANT LA RECOMBINAISON HETEROGENE DES ATOMES H A LA PAROI DU TUBE A DECHARGE ONT MONTRE SON INFLUENCE CONSIDERABLE SUR LA CINETIQUE DU PLASMA, ET, L'IMPOSSIBILITE DE CONNAITRE PRECISEMENT LA PROBABILITE DE RECOMBINAISON (PARAMETRE D'ENTREE DU CODE AJUSTE AUX MESURES EXPERIMENTALES), DU FAIT DE L'INHOMOGENEITE DE L'ETAT DE SURFACE DU TUBE ; NOUS NE POUVONS ESTIMER QUE DES ORDRES DE GRANDEUR DE CETTE PROBABILITE. POUR CELA, NOUS AVONS UTILISE LA FLUORESCENCE (FIL) ET DE L'EMISSION STIMULEE INDUITES PAR LASER (ESIL). DE PLUS, L'ABSORPTION DU SIGNAL D'ESIL PAR LES ATOMES H(N=2) NOUS A PERMIS DE MESURER LEUR CONCENTRATION (QUELQUES 10#1#1 CM#-#3). L'AMELIORATION DU CODE PASSE AUSSI PAR LA CONNAISSANCE DE LA TEMPERATURE DU GAZ. NOUS AVONS CONSTATE QUE LA TEMPERATURE ROTATIONNELLE EST DIFFERENTE DE CELLE-CI A 1 TORR. DE PLUS, LES MESURES D'ELARGISSEMENT DOPPLER MONTRENT QUE LA TEMPERATURE CINETIQUE DES ATOMES (MESUREE AUSSI PAR FIL) EST SUPERIEURE A CELLE DES MOLECULES: LA DECHARGE EST DONC EN DESEQUILIBRE THERMIQUE. CES TEMPERATURES SONT CONTROLEES PAR LA RELAXATION DES ATOMES H SUR LES MOLECULES H#2, PUIS DES NEUTRES SUR LA PAROI. PLUS LA FRACTION ATOMIQUE EST FAIBLE, PLUS CES TEMPERATURES SONT FAIBLES. ELLES DEPENDENT DONC DES TRANSFERTS ENERGETIQUES A LA PAROI, D'OU LA NECESSITE DE CONTROLER LA TEMPERATURE DE CELLE-CI. CES INFORMATIONS SUR NOTRE DECHARGE MICRO-ONDE D'HYDROGENE DE PETIT DIAMETRE NOUS A PERMIS DE METTRE AU POINT UN REACTEUR (DIATOMEE) DE GRAND DIAMETRE (10 CM) FONCTIONNANT A 915 MHZ, AVEC DE FORTES PUISSANCES (30 KW) ET UN ECOULEMENT DE GAZ EN CIRCUIT FERME (DU FAIT DES FORTS FLUX DE GAZ)

The Theory of Ionization of Gases by Collision

The Theory of Ionization of Gases by Collision PDF Author: Sir John Townsend
Publisher:
ISBN:
Category : Electric conductivity
Languages : en
Pages : 112

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Book Description


Dictionary of Building and Civil Engineering

Dictionary of Building and Civil Engineering PDF Author: Don Montague
Publisher: Taylor & Francis
ISBN: 9780419199106
Category : Architecture
Languages : en
Pages : 472

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Book Description
This dual-language dictionary lists over 20,000 specialist terms in both French and English, covering architecture, building, engineering and property terms. It meets the needs of all building professionals working on projects overseas. It has been comprehensively researched and compiled to provide an invaluable reference source in an increasingly European marketplace.

Precision Measurement and Fundamental Constants; Proceedings

Precision Measurement and Fundamental Constants; Proceedings PDF Author: United States. National Bureau of Standards
Publisher:
ISBN:
Category : Measurement
Languages : en
Pages : 546

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Book Description


Advanced Technologies Based on Wave and Beam Generated Plasmas

Advanced Technologies Based on Wave and Beam Generated Plasmas PDF Author: H. Schlüter
Publisher: Springer Science & Business Media
ISBN: 9780792356424
Category : Science
Languages : en
Pages : 592

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Book Description
This book draws together three areas of work on plasma technologies: advanced efforts based on wave generated, high frequency plasmas, plasma assisted ion implantation, and electron beam generated plasma. It lays a foundation for the application of sources in industry and various research areas

Annales de chimie--science des matériaux

Annales de chimie--science des matériaux PDF Author:
Publisher:
ISBN:
Category : Chemistry
Languages : en
Pages : 1028

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Book Description


A German-English Dictionary for Chemists

A German-English Dictionary for Chemists PDF Author: Austin M 1876-1956 Patterson
Publisher: Scholar Select
ISBN: 9781296567972
Category :
Languages : en
Pages : 340

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Book Description
This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

Nanomaterials and Nanochemistry

Nanomaterials and Nanochemistry PDF Author: C. Bréchignac
Publisher: Springer Science & Business Media
ISBN: 3540729933
Category : Science
Languages : en
Pages : 753

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Book Description
Here is a brilliant book that covers the major aspects of nanomaterials production. It integrates the many and varied chemical, material and thermo-dynamical facets of production, offering readers a new and unique approach to the subject. The mechanical, optical, and magnetic characteristics of nanomaterials are also presented in detail. Nanomaterials are a fast developing field of research and this book serves as both a reference work for researchers and a textbook for graduate students.

Optical Properties Of Graphene

Optical Properties Of Graphene PDF Author: Rolf Binder
Publisher: World Scientific
ISBN: 9813148764
Category : Science
Languages : en
Pages : 517

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Book Description
This book provides a comprehensive state-of-the-art overview of the optical properties of graphene. During the past decade, graphene, the most ideal and thinnest of all two-dimensional materials, has become one of the most widely studied materials. Its unique properties hold great promise to revolutionize many electronic, optical and opto-electronic devices. The book contains an introductory tutorial and 13 chapters written by experts in areas ranging from fundamental quantum mechanical properties to opto-electronic device applications of graphene.

ZnO Thin Films

ZnO Thin Films PDF Author: Paolo Mele
Publisher:
ISBN: 9781536160864
Category : Zinc oxide thin films
Languages : en
Pages : 0

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Book Description
Zinc oxide (ZnO) is an n-type semiconductor with versatile applications such as optical devices in ultraviolet region, piezoelectric transducers, transparent electrode for solar cells and gas sensors. This book "ZnO Thin Films: Properties, Performance and Applications" gives a deep insight in the intriguing science of zinc oxide thin films. It is devoted to cover the most recent advances and reviews the state of the art of ZnO thin films applications involving energy harvesting, microelectronics, magnetic devices, photocatalysis, photovoltaics, optics, thermoelectricity, piezoelectricity, electrochemistry, temperature sensing. It serves as a fundamental information source on the techniques and methodologies involved in zinc oxide thin films growth, characterization, post-deposition plasma treatments and device processing. This book will be invaluable to the experts to consolidate their knowledge and provide insight and inspiration to beginners wishing to learn about zinc oxide thin films.