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Abstract

Plasma disruptions are considered a major threat to the integrity of the first wall in next step fusion devices. Attempts have been made to understand the phenomena, which follow a disruption in the material, where its energy is deposited. The first approaches to give reliable answers on the thermal effects of a disruption were done by finite element calculations. In the meantime a number of simulation experiments have proved or disproved these results. The experimental studies take into account other consequences such as microcracking and solidification structures. Finally measurements on existing tokamaks are now providing better estimates on the charateristic values of disruptions. Experiments are described which investigate these phenomena during and immediately after a plasma disruption to a metallic surface. It is shown that the heat conduction model used in the early finite elements calculations is too simple and needs further development. The results are formulated in an analytical expression which is easy to use in the calculation of plasma disruption effects on metals. Metallurgical phenomena and their influence on the lifetime of the first wall are also discussed.

Additional information

Authors: SCHILLER P, JRC Ispra Estab. (IT);BROSSA F, JRC Ispra Estab. (IT);QUATAERT D, JRC Ispra Estab. (IT)
Bibliographic Reference: Paper presented: IAEA Consulting Meeting on Particle-Surface Interaction Data for Fusion, Wien (AT), April 19-21, 1989
Availability: Available from (1) as Paper EN 34861 ORA
Record Number: 198910791 / Last updated on: 1994-12-01
Category: PUBLICATION
Original language: en
Available languages: en
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