Fuzz growth in the gaps of castellated W in PISCES-A: Experiment and modeling
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F17%3A00477432" target="_blank" >RIV/61389021:_____/17:00477432 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1088/1361-6587/aa6b32" target="_blank" >http://dx.doi.org/10.1088/1361-6587/aa6b32</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1361-6587/aa6b32" target="_blank" >10.1088/1361-6587/aa6b32</a>
Alternative languages
Result language
angličtina
Original language name
Fuzz growth in the gaps of castellated W in PISCES-A: Experiment and modeling
Original language description
A castellated W target with gaps of width 0.5, 1.0, and 1.5 mm is exposed at 1120 K to He ions in the PISCES-A linear plasma device. The average ion impact energy was 70 eV and the accumulated ion fluence 3.6 × 1026 m-2 over the top surface, which is exposed normal to the plasma flow. A layer of W fuzz of 3.4 0.4 .mu.m thick developed on the top surface. In addition, fuzz morphology is found to develop on the side walls of the gaps. Particle in cell modeling of the plasma-target sheath using the SPICE2 code predicts the plasma penetration into the gaps. The He ion flux to gap side walls falls off quasi-exponentially with depth with a decay rate dependent on the gap width. When the variation in He ion wall fluence is used in conjunction with the fluence dependent growth expression of Petty et al (2015 Nucl. Fusion 55 093033), modeling correctly predicts the observed maximum depth of formation, and measured variation of layer thickness, for fuzz found on the gap walls.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10305 - Fluids and plasma physics (including surface physics)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Plasma Physics and Controlled Fusion
ISSN
0741-3335
e-ISSN
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Volume of the periodical
59
Issue of the periodical within the volume
6
Country of publishing house
GB - UNITED KINGDOM
Number of pages
6
Pages from-to
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UT code for WoS article
000425803000001
EID of the result in the Scopus database
2-s2.0-85019404776