STUDIES ON A 170 GHz MEGAWATT CLASS CW GYROTRON OPERATING IN THE TE28.12 MODE

Abstract

Iii this \V()rk. a concel)tual design of 17() GHz Megavatt (lass (oiitinuous Wave Gvmotron 15 P1''t The working mode is TE2 )2 A (lio(!e tVp(' lagnetioii Iii jectioli Guti ( \IIG) is (lesigne(l and OI)tilliiZe(l Ilsilig Gvrotroii Design Suit (GDS) V3 2014 and ESHAY (Odes. This gvrotron is designed with conventional (avitv which iliclli(les interaction seitiuti with \V('ak illl)llt and 011t1)llt tal)('1 se(tions. At place of interaction regioii sui)er-cun(lucmg uiagnets are use(l to provi(Ie lle(essalV magnetic field 6.725 1 for magnetic guidimce system. Output system of gvrutroii is designed that consists of non-linear taper followed liv Quasi-optical launcher and RF window. The softwares used to 1)rovide the design of difkreiit parts are GDS V3, Gvrotruii Cavity Interaction Calculations. Launcher Optiniization Tool (LOT) • for qllaSi-Ol)tical laninlier desigii and MATLAB for Mirror Siithesis. Phase Retrieval Algorithin illil)lclil('Iite(l and lnerge(l with ODS \13 for conventional Gyrotron and for (hiflerclll planes phase reconstruction has 1ecii done. The Iterative Phase Retrieval Algorithm for Gyrotrouus employ a iuuinerical solutiouu which cl(-lermiuues the phase of t he HF wave froin the Iiueasure(l intensity profile. Phase reconstruction is aclmieve(l by Iterative or Error reduction method in this case. The Phase recoiust riicl ion provide profile (1esigning of internal mode converter reflectors amid matching optical unit (MOU) for Grotrons. The MOU with two mirror systeiui is designed to correct the beani parameters like astigmatism and cllipticity. The (orrect beam contains alnuost ideal gaussian (ontent. as uiiore than 99 Y pure l-IE1 . i mode is required for optinmumuim perfi)rinance for electron cyclotron resomiaumce heating (ECRI I) transmission system or at plasma end.