ISSN:0033-7579    

DOI:10.1080/00337578508220690

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

ISSN:0033-7579    

DOI:10.1080/00337578508220691

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

ISSN:0033-7579    

DOI:10.1080/00337578508220692

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

ISSN:0033-7579    

DOI:10.1080/00337578508220693

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

The analytical formalism for evaluating the steady state hydrogen (tritium) inventory, recycle and permeation rate and recycle time for surfaces exposed to the plasma of an operating magnetic confinement fusion reactor is reviewed and new material relevant to the application of this theory is presented. The formalism includes hydrogen trapping, diffusion, and effects of thermal gradients (e.g., Ludwig-Soret effect), and is applicable for all orders of release kinetics at the inner and outer surfaces. The problem is formulated in terms of a unitless transport parameter, W=(Rφ/D)(k1/φ)l/r, whereris the order of the release kinetics, R is the range of the implant, φ is the penetrating part of the incident flux, kl is the recombination coefficient and D is the diffusion coefficient. The steady state analytical theory is applied to several materials of interest to controlled fusion.

ISSN:0033-7579    

DOI:10.1080/00337578508220694

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

Chemical erosion of graphite under hydrogen ion bombardment and the sputtering of Mo and W by oxygen ions was discussed in the session on “Synergisms on Surface Erosion”. The invited contributions are reviewed and the current understanding of the different effects are summarized. The relevance of these effects to the impurity production in fusion devices is discussed.

ISSN:0033-7579    

DOI:10.1080/00337578508220695

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

ISSN:0033-7579    

DOI:10.1080/00337578508220696

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

Preceded by an introduction to nomenclature, an overview is given of the session on “Surface Composition and Desorption” at the Workshop on “Synergistic Effects in Surface Phenomena Related to Plasma-Wall Interactions”, Nagoya, 1984. This summary of conclusions and highlights is interspersed with personal remarks and supplemented with additional references to relevant work in this field.

ISSN:0033-7579    

DOI:10.1080/00337578508220697

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

Materials currently being used or considered for plasma-side applications are not entirely satisfactory, particularly in the medium edge temperature (∼100–300 eV) regime. A new approach to impurity control based on self-sustaining surface segregated low-Z layers with high secondary ion fractions has been suggested and tested in laboratory experiments.

ISSN:0033-7579    

DOI:10.1080/00337578508220698

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

We have found that dilute concentrations of lithium in copper produce surfaces which are nearly pure lithium when heated and subject to irradiation. In order to better understand the experimental results, we have modeled the Cu-Li system using a modified version of the TRIM computer code and an alloy segregation program developed by N. Q. Lam. The TRIM code calculates the sputtering yield and depth of origin of the sputtered atoms for materials in which the composition varies from one atomic layer to the next and the segregation program uses these sputtering yields to trace the evolution of the concentration profile.

ISSN:0033-7579    

DOI:10.1080/00337578508220699

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor