Evolution of the small ball-like structures in the plasma focus discharge

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F16%3A00302766" target="_blank" >RIV/68407700:21230/16:00302766 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1515/nuka-2016-0027" target="_blank" >http://dx.doi.org/10.1515/nuka-2016-0027</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1515/nuka-2016-0027" target="_blank" >10.1515/nuka-2016-0027</a>

Result language

angličtina

Original language name

Evolution of the small ball-like structures in the plasma focus discharge

Original language description

The experiments were carried out in the PF-1000 plasma-focus device at the maximum current reaching about 2 MA, at the deuterium or neon filling and with deuterium injected from a gas-puff nozzle placed on the axis of the anode face. Ball-like structures of diameters of 1-12 mm were identified in interferometric and XUV pinhole camera frames. We made the statistical description of their parameters. A lifetime of the ball-like structures was in the range from 30 to 210 ns, and in some cases even more. These structures appeared mostly at the surface of the imploding plasma shell and they did not change their position in relation to the anode end. During the evolution of these structures, interferometric fringes were observed near the surfaces of the structures only, and their internal parts were initially chaotic (without noticeable) fringes. Subsequently the number of interferometric fringes increased (the internal 'chaotic' area was filled with fringes too) and later on it decreased. The radii of the ball-like structures were mostly increasing during their existence. The maximum electron density reached the value of 10(24) to 10(25) m(-3). The ball-like structures decayed by absorption inside the expanded pinch column and/or gradually expired in rare plasma outside of the dense plasma column.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BL - Plasma physics and discharge through gases

OECD FORD branch

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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

2016

Confidentiality

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

Name of the periodical

NUKLEONIKA

ISSN

0029-5922

e-ISSN

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Volume of the periodical

61

Issue of the periodical within the volume

2

Country of publishing house

PL - POLAND

Number of pages

5

Pages from-to

155-159

UT code for WoS article

000378086400013

EID of the result in the Scopus database

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