High energy physics and other sciences use rf structures for charged particle acceleration,
and are actively engaged in trying to extend the gradient limits of these devices. Although the
limits on high fields in rf cavities have been studied for many years, there is still some ambiguity
as to what causes breakdown and other phenomena that limit the ultimate gradients of these
devices, for example surface pulsed heating. The purpose of this workshop will be to review
recent experimental results as well as relevant theoretical models. We hope to have active
participation from the rf community, as well as significant input from those doing materials science
and numerical modeling. Although the primary focus of the workshop will be on normal conducting
structures, we would hope the discussion would be relevant to high gradient rf guns, high power
klystrons, high voltage breakdown and superconducting rf.
