DEVELOPMENT OF A MEDIUM POWER, SUBMILLIMETER-WAVE GYROTRON USING A 17 T SUPERCONDUCTING MAGNET

GYROTRON FU IV, a frequency tunable gyrotron for spectroscopy in the submillimeter wavelength range using a 17 T superconducting magnet, has been designed and constructed. Simulations predict that the gyrotron will emit radiation at high frequencies up to 394 GHz (TE(041) cavity mode) at the fundamental of the electron cyclotron frequency, up to 858 GHz (TE(091) mode) at the second harmonic and up to 1301 GHz (TE(8111) mode) at the third harmonic. preliminary experimental results have demonstrated operation from 158 to 443 GHz at the fundamental and from 336 to 838 GHz at the second harmonic. Output powers are several hundred watts and efficiencies several percent. (C) 1995 American Institute of Physics.