@techreport{oai:nifs-repository.repo.nii.ac.jp:00010214,
 author = {"Shimozuma,  T. and Sato,  M. and Takita,  Y. and Ito,  S. and Kubo,  S. and Idei,  H. and Ohkubo,  K. and Watari,  T. and Chu,  T.S. and Felch,  K. and Cahalan,  P. and Loring,  C.M."},
 month = {Oct},
 note = {"We fabricated and tested an 84GHz gyrotron with a single-stage depressed collector. The gyrotron has a high-voltage insulating section made of a low loss silicon nitride composite. In this preliminary experiment in the depressed collector configuration, we obtained 59l kW, 41% operation with a depression voltage of 22.5kV. Access to the higher efficiency region was inhibited by an increase in anode current."},
 title = {The First Preliminary Experiments on an 84 GHz Gyrotron with a Single-Stage Depressed Collector},
 year = {1997}
}