Simultaneous electrical and optical study of spoke rotation, merging and splitting in HiPIMS plasma

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F17%3A00094594" target="_blank" >RIV/00216224:14310/17:00094594 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1088/1361-6463/50/1/015209" target="_blank" >http://dx.doi.org/10.1088/1361-6463/50/1/015209</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1361-6463/50/1/015209" target="_blank" >10.1088/1361-6463/50/1/015209</a>

Result language

angličtina

Original language name

Simultaneous electrical and optical study of spoke rotation, merging and splitting in HiPIMS plasma

Original language description

To gain more information on the temporal and spatial behaviour of self-organized spoke structures in HiPIMS plasmas, a correlation between the broadband optical image of an individual spoke (taken over 200 ns) and the current it delivers to the target has been made for a range of magnetron operating conditions. As a spoke passes over a set of embedded probes in the niobium cathode target, a distinct modulation in the local current density is observed, (typically up to twice the average value), matching very well the radially integrated optical emission intensities (obtained remotely with an ICCD camera). The dual diagnostic system allows the merging and splitting of a set of spokes to be studied as they rotate. It is observed that in the merger of two spokes, the trailing spoke maintains its velocity while the leading spoke either decreases its velocity or increases its azimuthal length. In the spoke splitting process, the total charge collected by an embedded probe is conserved. A simple phenomenological model is developed that relates the spoke mode number m to the spoke dimensions, spoke velocity and gas atom velocity. The results are discussed in the context of the observations of spoke dynamics made by Hecimovic et al (2015 Plasma Sources Sci. Technol. 24 045005).

Czech name

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Czech description

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Type

J_imp - 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)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Physics D: Applied Physics

ISSN

0022-3727

e-ISSN

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Volume of the periodical

50

Issue of the periodical within the volume

1

Country of publishing house

GB - UNITED KINGDOM

Number of pages

10

Pages from-to

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UT code for WoS article

000389213100001

EID of the result in the Scopus database

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