Four Kilometer Cavity Lock at Livingston
         by Rai Weiss

Newsletter Front Page

Last Saturday night, January 27, the 4-km cavity along the X-arm here at Livingston was locked in the TEoo mode for periods of about a quarter of an hour. There were large amplitude fluctuations in the transmitted beam correlated with cavity optic axis pitch instabilities. The lock is not robust as there is little phase or gain margin but it is a good beginning and one can now imagine, with further work, operating the machine for the Third Engineering (E3) run.