Study of tungsten surface interaction with plasma streams at DPF-1000U
Ladygina Marina S.,
Skladnik-Sadowska Elzbieta,
Zaloga Dobromil R.,
Malinowski Karol,
Sadowski Marek J.,
Kubkowska Monika,
Kowalska-Strzeciwilk Ewa,
Paduch Marian,
Zielinska Ewa,
Miklaszewski Ryszard,
Garkusha Igor E.,
Gribkov Vladimir A.
Affiliations
Ladygina Marina S.
Institute of Plasma Physics, NSC KIPT, 61-108 Kharkov, Ukraine, Tel.: +380 57 335 6122, Fax: +380 57 335 2664
Skladnik-Sadowska Elzbieta
National Centre for Nuclear Research (NCBJ), 7 Andrzeja Soltana Str., 05-400 Otwock/Swierk, Poland
Zaloga Dobromil R.
National Centre for Nuclear Research (NCBJ), 7 Andrzeja Soltana Str., 05-400 Otwock/Swierk, Poland
Malinowski Karol
National Centre for Nuclear Research (NCBJ), 7 Andrzeja Soltana Str., 05-400 Otwock/Swierk, Poland
Sadowski Marek J.
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
Kubkowska Monika
Institute of Plasma Physics and Laser Microfusion (IPPLM), 23 Hery Str., 01-497 Warsaw, Poland
Kowalska-Strzeciwilk Ewa
Institute of Plasma Physics and Laser Microfusion (IPPLM), 23 Hery Str., 01-497 Warsaw, Poland
Paduch Marian
Institute of Plasma Physics and Laser Microfusion (IPPLM), 23 Hery Str., 01-497 Warsaw, Poland
Zielinska Ewa
Institute of Plasma Physics and Laser Microfusion (IPPLM), 23 Hery Str., 01-497 Warsaw, Poland
Miklaszewski Ryszard
Institute of Plasma Physics and Laser Microfusion (IPPLM), 23 Hery Str., 01-497 Warsaw, Poland
Garkusha Igor E.
Institute of Plasma Physics, NSC KIPT, 61-108 Kharkov, Ukraine, Tel.: +380 57 335 6122, Fax: +380 57 335 2664
Gribkov Vladimir A.
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
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.
