The aging phenomena are very complex physical and chemical
processes. The author attempts to qualitatively discuss various
physical processes contributing to aging. The satisfactory
quantitative explanation is not presently available. In this
sense, there is little progress made since the 1986 LBL Aging
Workshop. However, what was accomplished during the past decade
is a heighten awareness from the research and management sides
to pay more attention to this problem, and as a result a number
of aging tests have increased in quantity and quality. These
efforts will undoubtedly yield some new results in the
future. Examples in this paper are mainly from a pre-LHC and
pre-HERA-B era of aging, where the total charge doses is
limited to much less than one C/cm.
Abstract: