Study of tungsten surface interaction with plasma streams at DPF-1000U

• Authors: Marina S. Ladygina , Elzbieta Skladnik-Sadowska , Dobromil R. Zaloga , Karol Malinowski , Marek J. Sadowski , Monika Kubkowska , Ewa Kowalska-Strzeciwilk , Marian Paduch , Ewa Zielinska , Ryszard Miklaszewski , Igor E. Garkusha , Vladimir A. Gribkov
• Languages of publication: EN

Abstracts

EN

In this note experimental studies of tungsten (W) samples irradiated by intense plasma-ion streams are reported. Measurements were performed using the modified plasma focus device DPF-1000U equipped with an axial gas-puffing system. The main diagnostic tool was a Mechelle®900 optical spectrometer. The electron density of a freely propagating plasma stream (i.e., the plasma stream observed without any target inside the vacuum chamber) was estimated on the basis of the half-width of the Dβ spectral line, taking into account the linear Stark effect. For a freely propagating plasma stream the maximum electron density amounted to about 1.3 × 1017 cm−3 and was reached during the maximum plasma compression. The plasma electron density depends on the initial conditions of the experiments. It was thus important to determine first the plasma flow characteristics before attempting any target irradiation. These data were needed for comparison with plasma characteristics after an irradiation of the investigated target. In fact, spectroscopic measurements performed during interactions of plasma streams with the investigated W samples showed many WI and WII spectral lines. The surface erosion was determined from mass losses of the irradiated samples. Changes on the surfaces of the irradiated samples were also investigated with an optical microscope and some sputtering and melting zones were observed.

Keywords

EN

DPF-1000U; electron density; gas-puffing; plasma stream; tungsten

• Publisher: De Gruyter Open
• Journal: Nukleonika
• Year: 2015
• Volume: 60
• Issue: 2
• Pages: 293-296

Dates

published

1 - 6 - 2015

received

12 - 6 - 2014

online

22 - 6 - 2015

accepted

5 - 1 - 2015

Contributors

author

Marina S. Ladygina

• Institute of Plasma Physics, NSC KIPT, 61-108 Kharkov, Ukraine, Tel.: [phone], Fax: [phone]

author

Elzbieta Skladnik-Sadowska

• National Centre for Nuclear Research (NCBJ), 7 Andrzeja Soltana Str., 05-400 Otwock/Swierk, Poland

author

Dobromil R. Zaloga

• National Centre for Nuclear Research (NCBJ), 7 Andrzeja Soltana Str., 05-400 Otwock/Swierk, Poland

author

Karol Malinowski

• National Centre for Nuclear Research (NCBJ), 7 Andrzeja Soltana Str., 05-400 Otwock/Swierk, Poland

author

Marek J. Sadowski

• National Centre for Nuclear Research (NCBJ), 7 Andrzeja Soltana Str., 05-400 Otwock/Swierk, Poland and Institute of Plasma Physics and Laser Microfusion (IPPLM), 23 Hery Str., 01-497 Warsaw, Poland

author

Monika Kubkowska

• Institute of Plasma Physics and Laser Microfusion (IPPLM), 23 Hery Str., 01-497 Warsaw, Poland

author

Ewa Kowalska-Strzeciwilk

• Institute of Plasma Physics and Laser Microfusion (IPPLM), 23 Hery Str., 01-497 Warsaw, Poland

author

Marian Paduch

• Institute of Plasma Physics and Laser Microfusion (IPPLM), 23 Hery Str., 01-497 Warsaw, Poland

author

Ewa Zielinska

• Institute of Plasma Physics and Laser Microfusion (IPPLM), 23 Hery Str., 01-497 Warsaw, Poland

author

Ryszard Miklaszewski

• Institute of Plasma Physics and Laser Microfusion (IPPLM), 23 Hery Str., 01-497 Warsaw, Poland

author

Igor E. Garkusha

• Institute of Plasma Physics, NSC KIPT, 61-108 Kharkov, Ukraine, Tel.: [phone], Fax: [phone]

author

Vladimir A. Gribkov

• Institute of Plasma Physics and Laser Microfusion (IPPLM), 23 Hery Str., 01-497 Warsaw, Poland and A. A. Baikov Institute of Metallurgy and Material Science, 119991 Moscow, Russia

References

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Identifiers

DOI

10.1515/nuka-2015-0048