NUKLEONIKA 2008, 53(3):111-121

 


DAMAGE AND MODIFICATION OF MATERIALS PRODUCED BY PULSED ION AND PLASMA STREAMS IN DENSE PLASMA FOCUS DEVICE



Valeriy N. Pimenov1, Elena V. Demina1, Sergey A. Maslyaev1, Lev I. Ivanov1,
Vladimir A. Gribkov2,4, Alexander V. Dubrovsky2, Ülo Ugaste3, Tonu Laas3,
Marek Scholz4, Ryszard Miklaszewski4, Blagoslav Kolman5, Agostino Tartari6

1 A. A. Baikov Institute of Metallurgy and Material Science, Russian Academy of Sciences,
49 Leninsky Pr., 119991 Moscow, Russia
2 Moscow Physical Society, 53 Leninsky Pr., Moscow 117924, Russia
3 Tallinn University, 25 Narva Road, 10120 Tallinn, Estonia
4 Institute of Plasma Physics and Laser Microfusion,
23 Hery Str., 01-497 Warsaw, P. O. Box 49, Poland
5 Institute of Plasma Physics ASCR, 3 Za Slovankou Str.,
P. O. Box 17, 18221 Prague 8, Czech Republic
6 Ferrara University, 12 Via del Paradiso Str, Ferrara 44100, Italy

The Dense Plasma Focus (DPF) devices PF-1000, PF-6 and PF-5M working with different gases and in dissimilar irradiation modes were used to carry out experimental investigations of irradiation of a number of materials by powerful pulsed ion and high-temperature plasma streams. The materials under test were designed for application in structural and functional components of thermonuclear fusion devices with magnetic (MPC) and inertial (IPC) plasma confinement, as well as for working chambers of plasma and accelerator devices. The main features of the materials are low-activation and radiation-resistant properties. On the basis of the investigations a significant progress was achieved in understanding of dynamics of high-energy nano- and micro-second pulsed streams in DPF from one side as well as on the mechanisms of their influence upon materials under irradiation from the other one. We demonstrated that this approach can be useful for certain tests of plasma-facing materials (e.g. W for MPC and stainless steels for IPC) and of structural (construction) elements of the above-mentioned devices subjected to pulsed high-energy radiation streams. The results obtained suggest also that DPF devices can be used in new pulse technologies for material treatment by means of powerful nanosecond and microsecond pulses of plasma and ion streams.

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