Reactive RF Tuning for Compensation of a Detuned Accelerating Cavity       733
  Y. Kang (ONRL), M. Tiefenback, and P. Chevtsov (TJNAF)    
       
  High frequency linear accelerator: a perturbative study of the transmission matrix of a two port device chain       742
  M. R. Masullo, A. D'Elia, V. G. Vaccaro (INFN,DSF), D. Davino (BNL), L. De Menna, S. Falco (DIEL)