  Most up-to-date high gradient test of the CLIC prototype structures as of
September 2011 is described in this report. The "T24" undamped structure showed
fast processing time, still-decreasing breakdown rate and its breakdown rate
was estimated to be as low as the CLIC requirement. The "TD24" damped structure
showed not so excellent high gradient performance as undamped "T24" but the
characteristics was much improved than the damped "TD18" structure with higher
magnetic field. Further R&D is needed and we present some of the present
efforts at KEK.
