Lessons learned after three years of SPIDER operation and the first MITICA integrated tests
Abstract
ITER envisages the use of two heating neutral beam injectors plus an optional one as part of the auxiliary heating and current drive system. The 16.5 MW expected neutral beam power per injector is several notches higher than worldwide existing facilities. A Neutral Beam Test Facility (NBTF) was established at Consorzio RFX, exploiting the synergy of two test beds, SPIDER and MITICA. SPIDER is dedicated to developing and characterizing large efficient negative ion sources at relevant parameters in ITER-like conditions: source and accelerator located in the same vacuum where the beam propagates, immunity to electromagnetic interferences of multiple radio-frequency (RF) antennas, avoidance of RF-induced discharges on the outside of the source. Three years of experiments on SPIDER have addressed to the necessary design modifications to enable full performances. The source is presently under a long shut-down phase to incorporate learnings from the experimental campaign. Parallelly, developments on MITICA, the full-scale prototype of the ITER NBI featuring a 1 MV accelerator and ion neutralization, are underway including manufacturing of in-vessel components, while power supplies and auxiliary plants are already under final testing and commissioning. Integration, commissioning and tests of the 1MV power supplies are essential for this first-of-kind system, unparalleled both in research and industry field. The integrated test to confirm 1MV output by combining invertor systems, DC generators and transmission lines extracted errors/accidents in some components. To realize a concrete system for ITER, solutions for the repair and the improvement of the system were developed. Hence, NBTF is emerging as a necessary facility, due to the large gap with existing injectors, effectively dedicated to identify issues and find solutions to enable successful ITER NBI operations in a time bound fashion.
Keywords
Cite
@article{arxiv.2304.01692,
title = {Lessons learned after three years of SPIDER operation and the first MITICA integrated tests},
author = {D. Marcuzzi and V. Toigo and M. Boldrin and G. Chitarin and S. Dal Bello and L. Grando and A. Luchetta and R. Pasqualotto and M. Pavei and G. Serianni and L. Zanotto and R. Agnello and P. Agostinetti and M. Agostini and D. Aprile and M. Barbisan and M. Battistella and G. Berton and M. Bigi and M. Brombin and V. Candela and V. Candeloro and A. Canton and R. Casagrande and C. Cavallini and R. Cavazzana and L. Cordaro and N. Cruz and M. Dalla Palma and M. Dan and A. De Lorenzi and R. Delogu and M. De Muri and M. De Nardi and S. Denizeau and M. Fadone and F. Fellin and A. Ferro and E. Gaio and C. Gasparrini and F. Gnesotto and P. Jain and A. La Rosa and D. Lopez-Bruna and R. Lorenzini and A. Maistrello and G. Manduchi and S. Manfrin and N. Marconato and I. Mario and G. Martini and R. Milazzo and T. Patton and S. Peruzzo and N. Pilan and A. Pimazzoni and C. Poggi and N. Pomaro and B. Pouradier-Duteil and M. Recchia and A. Rigoni-Garola and D. Rizzetto and A. Rizzolo and F. Santoro and E. Sartori and B. Segalini and A. Shepherd and M. Siragusa and P. Sonato and A. Sottocornola and E. Spada and S. Spagnolo and M. Spolaore and C. Taliercio and P. Tinti and P. Tomsič and L. Trevisan and M. Ugoletti and M. Valente and M. Valisa and F. Veronese and M. Vignando and P. Zaccaria and R. Zagorski and B. Zaniol and M. Zaupa and M. Zuin and M. Cavenago and D. Boilson and C. Rotti and H. Decamps and F. Geli and A. Sharma and P. Veltri and J. Zacks and M. Simon and F. Paolucci and A. Garbuglia and D. Gutierrez and A. Masiello and G. Mico and C. Labate and P. Readman and E. Bragulat and L. Bailly-Maitre and G. Gomez and G. Kouzmenko and F. Albajar and M. Kashiwagi and H. Tobari and A. Kojima and M. Murayama and S. Hatakeyama and E. Oshita and T. Maejima and N. Shibata and Y. Yamashita and K. Watanabe and N. P. Singh and M. J. Singh and H. Dhola and U. Fantz and B. Heinemann and C. Wimmer and D. Wünderlich and K. Tsumori and G. Croci and G. Gorini and A. Muraro and M. Rebai and M. Tardocchi and L. Giacomelli and D. Rigamonti and F. Taccogna and D. Bruno and M. Rutigliano and S. Longo and S. Deambrosis and E. Miorin and F. Montagner and A. Tonti and F. Panin},
journal= {arXiv preprint arXiv:2304.01692},
year = {2023}
}