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Your search keyword '"Lampasi, Alessandro"' showing total 12 results
Start Over Author "Lampasi, Alessandro" Publisher elsevier b.v.
12 results on '"Lampasi, Alessandro"'

11. Final design of the Switching Network Units for the JT-60SA Central Solenoid.

Author

Lampasi, Alessandro, Coletti, Alberto, Novello, Luca, Matsukawa, Makoto, Burini, Filippo, Taddia, Giuseppe, and Tenconi, Sandro

Subjects
*SOLENOIDS, *ELECTROMECHANICAL effects, *NETWORK switching subsystem, *SUPERCONDUCTORS, *COMPUTER simulation, *TOKAMAKS
Abstract

Abstract: This paper describes the approved detailed design of the four Switching Network Units (SNUs) of the superconducting Central Solenoid of JT-60SA, the satellite tokamak that will be built in Naka, Japan, in the framework of the “Broader Approach” cooperation agreement between Europe and Japan. The SNUs can interrupt a current of 20kA DC in less than 1ms in order to produce a voltage of 5kV. Such performance is obtained by inserting an electronic static circuit breaker in parallel to an electromechanical contactor and by matching and coordinating their operations. Any undesired transient overvoltage is limited by an advanced snubber circuit optimized for this application. The SNU resistance values can be adapted to the specific operation scenario. In particular, after successful plasma breakdown, the SNU resistance can be reduced by a making switch. The design choices of the main SNU elements are justified by showing and discussing the performed calculations and simulations. In most cases, the developed design is expected to exceed the performances required by the JT-60SA project. [Copyright &y& Elsevier]

Published
2014
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12. A high frequency, high power CARM proposal for the DEMO ECRH system.

Author

Mirizzi, Francesco, Spassovsky, Ivan, Ceccuzzi, Silvio, Dattoli, Giuseppe, Di Palma, Emanuele, Doria, Andrea, Gallerano, Gianpiero, Lampasi, Alessandro, Maffia, Giuseppe, Ravera, GianLuca, Sabia, Elio, Tuccillo, Angelo Antonio, and Zito, Pietro

Subjects
*TOKAMAKS, *DOPPLER effect, *NUCLEAR fusion, *ELECTRON temperature, *PLASMA gases, *RADIO frequency
Abstract

ECRH&CD systems are extensively used on tokamak plasmas due to their capability of highly tailored power deposition, allowing very localised heating and non-inductive current drive, useful for MHD and profiles control. The high electron temperatures expected in DEMO will require ECRH systems with operating frequency in the 200–300 GHz range, equipped with a reasonable number of high power ( P ≥ 1 MW) CW RF sources, for allowing central RF power deposition. In this frame the ENEA Fusion Department (Frascati) is coordinating a task force aimed at the study and realisation of a suitable high power, high frequency reliable source. [ABSTRACT FROM AUTHOR]

Published
2015
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