Title :
Design of the ITER 170 GHz gyrotron gun
Author :
Yovchev, I. ; Hogge, J.-P. ; Goodman, T. ; Alberti, S. ; Tran, T.M.
Author_Institution :
Centre de Recherches en Phys. des Plasmas, Ecole Polytech. Fed. de Lausanne, Switzerland
fDate :
27 Sept.-1 Oct. 2004
Abstract :
The optimized design of the ITER 2 MW, 170 GHz, CW, coaxial cavity gyrotron gun is presented. Simulations show that a good beam quality can be attained (pitch-ratio spread δα of ∼1.9%, electron beam thickness in the cavity of ∼0.45 mm) and confirm previous results that the lowest δα values are achieved at an intermediate type of the electron flow. Adjusting the currents through the gun coils results in considerable variation of the beam pitch-ratio α. This can compensate the deviations of α from its specified value of 1.3 for changes in magnetic field and axial alignment.
Keywords :
Tokamak devices; electron guns; gyrotrons; magnetrons; millimetre wave tubes; plasma radiofrequency heating; 0.45 nm; 170 GHz; 2 MW; ITER; axial alignment; beam pitch ratio; continuous wave coaxial cavity gyrotron gun; electron flow; gun coils; magnetic field; magnetrons; optimization; Cathodes; Coaxial components; Coils; Design optimization; Electron beams; Gyrotrons; Inductors; Magnetic fields; Plasma simulation; Root mean square;
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.2004.1422256
