This title appears in the Scientific Report :
2004
Please use the identifier:
http://dx.doi.org/10.1238/Physica.Topical.111a00118 in citations.
Deposition of hydrogen rich carbon films in remote areas of TEXTOR
Deposition of hydrogen rich carbon films in remote areas of TEXTOR
Formation of layers deposited in remote areas of TEXTOR are discussed in detail. Their composition, thickness and optical properties were examined. These deposits form soft, semitransparent films consisting mainly of carbon, hydrogen and deuterium. The content of hydrogenic species depends on temper...
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Personal Name(s): | von Seggern, J. |
---|---|
Kirschner, A. / Philipps, V. / Wienhold, P. | |
Contributing Institute: |
Institut für Plasmaphysik; IPP |
Published in: | Physica scripta, T111 (2004) S. 118 - 122 |
Imprint: |
Bristol
IoP Publ.
2004
|
Physical Description: |
118 - 122 |
DOI: |
10.1238/Physica.Topical.111a00118 |
Document Type: |
Journal Article |
Research Program: |
Kernfusion und Plasmaforschung |
Series Title: |
Physica Scripta Topical Issue
111 |
Subject (ZB): | |
Publikationsportal JuSER |
Formation of layers deposited in remote areas of TEXTOR are discussed in detail. Their composition, thickness and optical properties were examined. These deposits form soft, semitransparent films consisting mainly of carbon, hydrogen and deuterium. The content of hydrogenic species depends on temperature of the location, where the deposit had grown. The D/C fraction varies between similar to 0.07 at the hot part of the duct inside the vacuum vessel and similar to 0.7 in cold sections of the pump duct. The mean deposition rate of carbon in the pump ducts was similar to 1 x 10(21) C/h; which corresponds to about 0.1% of carbon eroded from the blades of the poloidal belt limiter. Despite the low deposition rate of carbon and, consequently, also of deuterium, these deposits might be decisive in view of tritium retention. Deposition pattern observed in the ducts are compared with computer simulations assuming neutral hydrocarbon radicals as originators of the films. |