Title :
Second-harmonic operation of coaxial gyrotrons - towards a proof-of-principle experiment
Author :
Avramides, K.A. ; Vomvoridis, J.L. ; Piosczyk, B. ; Iatrou, C.T.
Author_Institution :
Sch. of Electr. & Comput. Eng., Nat. Tech. Univ. of Athens, Greece
fDate :
27 Sept.-1 Oct. 2004
Abstract :
We discuss the possibility of a proof-of-principle experiment regarding the excitation of a high-order mode interacting with the electrons at the second harmonic of the cyclotron frequency in a coaxial gyrotron cavity with a longitudinally corrugated inner conductor. The experiment employs the 2 MW-170 GHz coaxial gyrotron for ITER at Forschungszentrum Karlsruhe, Germany, which is designed to operate with the TE34,19 mode at the fundamental cyclotron frequency. Our study suggests that by using about half the magnetic field and modifying the coaxial cavity to a reasonable extent, the TE34,19 mode (or some other mode of similar eigenvalue) can be excited at 170 GHz as a second-harmonic mode.
Keywords :
gyrotrons; 170 GHz; 2 MW; ITER; TE34,19 mode; coaxial gyrotron cavity; cyclotron frequency; high order mode interaction; longitudinally corrugated inner conductor; magnetic field; proof-of-principle experiment; second harmonic mode; second harmonic operation; Anodes; Coaxial components; Conductors; Cyclotrons; Eigenvalues and eigenfunctions; Electrons; Frequency; Gyrotrons; Magnetic fields; Tellurium;
Conference_Titel :
Infrared and Millimeter Waves, 2004 and 12th International Conference on Terahertz Electronics, 2004. Conference Digest of the 2004 Joint 29th International Conference on
Print_ISBN :
0-7803-8490-3
DOI :
10.1109/ICIMW.2004.1422247
