Summary of the Fourth International Workshop on Spallation Materials Technology (IWSMT-4)

The Fourth International Workshop on Spallation Materials Technology (IWSMT -4) took place on 8-13 October in Schruns, Austria. The present volume cont ains the proceedings of this workshop. 53 scientists from Europe, USA and J apan presented 44 papers covering a wide range of topics including the stat us of spallation target R&D activities, effects of radiation damage, hydrog en, helium and other transmutation impurities in materials, particle transp ort calculations, heavy liquid metal corrosion and compatibility, and mater ials engineering. The main progress, with an emphasis on materials technolo gy in different projects, namely the US Spallation Neutron Source (SNS), th e European Spallation Source (ESS), the Japanese Spallation Neutron Source (JSNS), the Swiss Spallation Neutron Source (SINQ) and the US Accelerator P roduction of Tritium facility (APT) was overviewed. Progress from the Europ ean TECLA and SPIRE programs was described. The achievements of investigati ons in the last two years on mechanical properties and microstructures of m aterials under high-energy proton (spallation), neutron and low energy ion irradiations were reported. The latest results from studies on corrosion an d embrittlement effects of heavy liquid metals (Hg, Pb-Bi and Pb) were pres ented. Some critical issues of liquid metal technology related to accelerat or driven systems (ADS), e.g. oxygen control and oxygen measurements were d iscussed. (C) 2001 Elsevier Science B.V. All rights reserved.