Title :
RF drivers for the Bevalac injector final stage RF amplifiers
Author :
Howard, D. ; Calvert, J. ; Hui, M. ; Lindner, A. ; Kellogg, N. ; Ridgeway, W. ; Woolfe, K.
Author_Institution :
Lawrence Berkeley Lab., California Univ., CA, USA
Abstract :
A 200-MHz intermediate power amplifier system, comprising of four separate chassis or cavity amplifiers is being developed as a driver stage for the Bevalac injector final RF amplifiers. The initial stage is a 200-W, solid-state, RF amplifier with 44 dB of gain. The two succeeding stages are cavity amplifiers that incorporate vacuum tubes. The first of the tube-type amplifiers is driven by the 200-W amplifier and contains a 3CPX800A7 triode calculated to output a maximum of 5 kW. The next stage, driven by the 5-kW amplifier, contains a 4CW25000B tetrode and is designed to drive the final amplifier. The 4CW25K stage is calculated to provide a maximum output power of 50 kW. The final stage is designed to operate with either a Varian 4CW100000e or a TH535 manufactured by Thomson-CSF. The final stage gain, using the 4CW100Ke, is calculated to be 13 dB at approximately 300-kW output. Using the Thomson tube, the stage gain is calculated to be slightly greater; however, the maximum achievable RF output power is approximately 300 kW. The system construction, design, and initial high power test results are presented.<>
Keywords :
nuclear electronics; radiofrequency amplifiers; storage rings; synchrotrons; 200 MHz; 200 W; 300 kW; 3CPX800A7 triode; 4CW100Ke; 4CW25000B tetrode; 4CW25K stage; 5 kW; 50 kW; Bevalac injector final stage RF amplifiers; RF drivers; TH535; Thomson tube; Thomson-CSF; Varian 4CW100000e; cavity amplifiers; driver stage; high power test results; initial stage; intermediate power amplifier system; maximum output power; separate chassis; solid-state; stage gain; system construction; tube-type amplifiers; vacuum tubes; Driver circuits; Electron tubes; Gain; Manufacturing; Power amplifiers; Power generation; Radio frequency; Radiofrequency amplifiers; Solid state circuits; System testing;
Conference_Titel :
Particle Accelerator Conference, 1991. Accelerator Science and Technology., Conference Record of the 1991 IEEE
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-0135-8
DOI :
10.1109/PAC.1991.164427