29th Symposium on Fusion Technology (SOFT 2016)

P4.023 Progress on the ENEA 500 kW, 250 GHz CARM design

Sep 8, 2016, 2:20 PM

1h 40m

Foyer 2A (2nd floor), 3A (3rd floor) (Prague Congress Centre)

Board: 23

Poster B. Plasma Heating and Current Drive P4 Poster session

Speaker

Ivan Spassovsky (Fusion Department)

Description

F. Mirizzi¹1, M. Carpanese²2, S. Ceccuzzi²2, F. Ciocci²2, G. Dattoli²2, E. Di Palma²2, A. Doria²2, G.P. Gallerano²2, G. Maffia²2, A. Petralia²2, G.L. Ravera²2, E. Sabia³3, I. Spassovsky²2, A.A. Tuccillo²2, S. Turtù²2, P. Zito²2 on behalf of the ENEA CARM task force. 1Consorzio CREATE, Via Claudio 21, I-80125 Napoli, Italy 2ENEA, C.R. Frascati, via E. Fermi 45, 00044 Frascati (Roma), Italy An ENEA task force is studying and designing a Cyclotron Auto Resonance Maser (CARM), with a RF power in excess of 500 kW and a nominal output frequency of 250 GHz. Its main application is foreseen in the ECCD system for DEMO, which expected very high electron temperatures call for EC frequencies in the 200 – 300 GHz range. Two different steps are foreseen before the realization of the final full specs CARM, the first one dedicated to the optimization of a 50 µs, 100 kW prototype. The second step foresees the test on FTU of a 500 kW prototype with a pulse length up to 100 ms. A really intense analytical work has been performed by the task force allowing the definition of the main parameters of the CARM, like beam voltage and current, magnetic field intensity and profile. The study of the high voltage power supply and modulation system for the first step of has been completed and the overall electrical parameters of this system are already available. An Electron gun and Electrodynamical system are designed too. The available results of the CARM analysis and design are presented in the paper.