@techreport{oai:nifs-repository.repo.nii.ac.jp:00010279,
 author = {"Tanabe,  T. and Noda,  N. and Nakamura,  H."},
 month = {Jun},
 note = {"Application of carbon based low Z materials to PFM has significantly improved plasma parameters in large tokamaks. There are, however, serious concerns of erosion, neutron damage etc. for application of low Z materials in future D-T burning machine. To apply high Z metals to PFM, there are several issues to be solved; high Z impurity production by sputtering , their accumulation in plasma center, and high radiation loss. Because of these concerns high Z metals are not widely employed nor planned to be used in the present large tokamaks. Since our efforts have been concentrated to optimize the low Z materials , little systematic investigations for high Z materials in tokamak have been done, lacking data base especially those concerning the impacts on plasma core. In order to employ high Z material as PFM near future, material properties related to impurity production and hydrogen recycling are reviewed and discussed what is important and what shall be done."},
 title = {Review of High Z Materials for PSI Applications},
 year = {1992}
}