Application of Quasi-Steady-State Plasma Streams for Material Studies

Journal Article · Wed Mar 19 00:00:00 EDT 2008 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2909152· OSTI ID:21136947

Tereshin, V I; Chebotarev, V V; Garkusha, I E; Makhlaj, V A ^[1]; Landman, I S ^[2]

---

1. Institute of Plasma Physics of the NSC KIPT, Kharkov, 61108 (Ukraine)
2. Forschungszentrum Karlsruhe, IHM, 76021 Karlsruhe (Germany)

The paper presents experimental studies of material response to high power plasma irradiation simulating ITER divertor heat loads. The experiments were performed with QSPA repetitive plasma pulses with the duration of 0.25 ms and the energy density up to 2.5 MJ/m{sup 2}. Surface morphology of the targets exposed to QSPA plasma screams is analyzed for impacting plasma loads both below and above the melting threshold. Relative contribution of the Lorentz force and plasma pressure gradient to the melt layer erosion is discussed. Development of cracking on the tungsten surface and swelling of the surface are found to be in strong dependence on initial temperature of the target.

• OSTI ID: 21136947
• Journal Information: AIP Conference Proceedings, Vol. 993, Issue 1; Conference: PLASMA 2007: International conference on research and applications of plasmas; 4. German-Polish conference on plasma diagnostics for fusion and applications; 6. French-Polish seminar on thermal plasma in space and laboratory, Greifswald (Germany), 16-19 Oct 2007; Other Information: DOI: 10.1063/1.2909152; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BEAM-PLASMA SYSTEMS
CRACKING
DIVERTORS
ELECTRIC DISCHARGES
ENERGY DENSITY
EROSION
HEATING LOAD
IRRADIATION
ITER TOKAMAK
LAYERS
LORENTZ FORCE
MELTING
MORPHOLOGY
PLASMA
PLASMA PRESSURE
STEADY-STATE CONDITIONS
SURFACES
SWELLING
TUNGSTEN