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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

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10305 - Fluids and plasma physics (including surface physics)

Result continuities

  • Project

  • 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

  • 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

  • UT code for WoS article

    000425803000001

  • EID of the result in the Scopus database

    2-s2.0-85019404776