||The activities at LANL in the past
two years since the last workshop are described. The main theme
of our activity was the development of spoke cavities for low-energy
sections of high-power proton accelerators. We designed and
procured two 350 MHz, beta=0.175, 2-gap spoke cavities from industry
and tested them. Both cavities have shown excellent performance,
i.e., accelerating gradients of 13-13.5 MV/m with low-field unloaded Q
of >1E9 as compared to required 7.5 MV/m and 5E8, respectively.
Some results on RF surface resistance measurements of magnesium
diboride (MgB2), a relatively new high Tc material with transition
temperature of 39 K, will also be shown.