Linear Research Of Coaxial-Cavity Cyclotron Autoresonance Maser (CARM) Amplifier

Being high power, high efficiency resources of millimeter and submillimeter-wave radiation, based on electron cyclotron maser, cyclotron autoresonance maser (CARM) has some advantages both conventional gyrotron and free electron laser and has been paid much respect in the world for vast applications in many areas such as plasma heating, linear accelerators, millimeter wave radar,communications, electronic countermeasure and so forth.Specitically in twenty years later, the CARM has been subjected to extensive theoretical and experimental studies. A lot of studies have been done on the cylindrical-cavity CARM oscillator and received considerable achievements. On the cylindrical-cavith CARM amplifer, the theoretical studies have been done a lot, but the experimental studies have been reported only by the MIT.With the higher request on output power of the millimeter- wave devices, the problemes of the ohmic wall loading and mode competition have been paid much attention. Aim at the study actuality,a new type device--coaxial-cavity CARM amplifier has been broughtforward in this task. One of the advantages of the coaxial-cavity is increase the area of dispersing heat and improve the capability of dispersing heat; in addition, the coaxial structures can be successfully employed to achieve higher power levels with reduced the problem of mode competition. At the same time, cylindrical-cavity CARM amplifier and gyro-twt's advantages have been combined. This thesis expatiates the theory of coaxial-cavity CARM and its practicable based on electron cyclotron maser and the operational principle of CARM. The third chapter analyzed the interplay of the electrons and wave using the gyrokinetics theory of electron cyclotron maser. The dispersion equations have been educed based on the gyrokinetics theory of electron cyclotron maser, and a simulation code has been made by FORTRAN to compute both dispersion equations ofcylindrical-cavity and coaxial-cavity CARM amplifier. The simulation code's reliability has been attested by simulating the expriements of cylindrical-cavity CARM and cylindrical-cavity gyro-twt in the forth chapter. In the fifth chapter, the TE31,17,165 GHz coaxial-cavity CARM amplifier has been simulated and the parameters has been optimized, and the highest gain is 295.19dB/m.The thesis contributes to the theoretical and exprimental studies of coaxial-cavity CARM amplifier from the theory and computer simulation.