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Spectroscopic Studies Of Carbon Impurities In Pisces A

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Spectroscopic Studies Of Carbon Impurities In Pisces A

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Author : Y. RA
language : en
Publisher:
Release Date : 1989

Spectroscopic Studies Of Carbon Impurities In Pisces A written by Y. RA and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with categories.

Spectroscopic Studies Of Carbon Impurities In Pisces A

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Author :
language : en
Publisher:
Release Date : 1989

Spectroscopic Studies Of Carbon Impurities In Pisces A written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with categories.

The graphite used for the limiter of the tokamak reactor produces carbon-containing molecular impurities as a result of the interactions with the edge plasma. The behavior of these molecular impurities has been studied using emission spectroscopy. The present study includes: finding molecular bands and atomic lines in the visible spectral range which can be used for the study of the molecular impurities, studying the breakup processes of the molecular impurities on their way from the source into the plasma, developing a spectroscopic diagnostic method for the absolute measurement of the molecular impurity flux resulting from graphite erosion. For these studies, carbon-containing molecules such as CH4, C2H2, C2H4, and CO2 were injected into the tokamak-boundary, like plasma generated by PISCES-A. The spectrograms of these gases were taken. Many useful bands and lines were determined from the spectrograms. The breakup processes of these gases were studied by observing the spatial profiles of the emission of the molecules and their radicals for different plasma conditions. For the absolute measurement of the eroded molecular impurity flux, the photon efficiency of the lines and bands were found by measuring the absolute number of the emitted photons and injected gas molecules. The chemical sputtering yield of graphite by hydrogen plasma was spectroscopically measured using the previously obtained photon efficiencies. It showed good agreement with results obtained by weight loss measurements. 16 refs., 7 figs., 1 tab.

Pisces Program Plasma Surface Interactions Research

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Author :
language : en
Publisher:
Release Date : 1989

Pisces Program Plasma Surface Interactions Research written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with categories.

This paper discusses the following about the Pisces program: Major objectives of the program; Staff in the PISCES program at UCLA; Highlights in the program; Collaborations with other institutions; PISCES-A facility; PISCES-B facility; Fast scanning Langmuir probe; Omegatron mass spectrometer; Spectroscopic diagnostics; Data acquisition system; Redeposition effect on carbon chemical erosion; Erosion of carbon tokamakium from TFTR; Effect of boron-doping on carbon chemical erosion; Radiation enhanced sublimation of carbon; Surface analysis of TEXTOR titles; Spectroscopic analysis of carbon impurities; Biased limiter and divertor; Biased divertor channel; Gaseous divertor experiments; Presheath profile measurements; Particle transport in CCT tokamak; and Biased divertor experiments in CCT.

Energy Research Abstracts

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Author :
language : en
Publisher:
Release Date : 1990

Energy Research Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Power resources categories.

9th International Workshop On Carbon Materials Hohenkammer Castle Germany September 18 19 2000

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Author : Wolfgang Jacob
language : en
Publisher:
Release Date : 2001

9th International Workshop On Carbon Materials Hohenkammer Castle Germany September 18 19 2000 written by Wolfgang Jacob and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Carbon composites categories.