Articolo in rivista, 2023, ENG, 10.1016/j.fusengdes.2023.113472

SPIDER ion source and extraction power supplies - An update of the design of the bias circuits after four years of operation

Shepherd A.; Bigi M.; Casagrande R.; Dan M.; Maistrello A.; Sartori E.; Serianni G.; Decamps H.; Zanotto L.

Consorzio RFX (CNR, ENEA, INFN), Università di Padova, Acciaierie Venete SpA, Padova, Italy; CCFE, Culham Science Centre, Abingdon, Oxon, UK; Department of Management and Engineering, Università degli Studi di Padova, Vicenza, Italy; CRF, University of Padova, Italy; CNR-ISTP, Istituto per la Scienza e Tecnologia dei Plasmi, Sede di Padova, Italy; ITER Organization, St Paul Lez Durance, France.

SPIDER, the ion source prototype for ITER neutral beam injectors, has been in operation since 2018. The experiment includes a system of Ion Source and Extraction Power Supplies (ISEPS), whose design dates back to 2011. Since then the experience gained has led to substantial changes, the most dramatic modification being the complete replacement of the radiofrequency power supply, described elsewhere. This contribution details operating experience and calculations that have led to defining new requirements for a specific subset of power supplies, the bias power supplies. The bias power supplies perform the function of filtering out electrons extracted together with the negative ions and in the original 2011 ISEPS design are single quadrant resonant converters. For the two bias power supplies, the picture resulting from the review described in the paper is a substantial redesign, with the ability to operate in four quadrants and a twofold increase of the rated output voltage the most significant new specifications.

Fusion engineering and design (Print) 189 , pp. 113472-1–113472-5

Keywords

ITER, SPIDER, extraction power supplies

CNR authors

Serianni Gianluigi

CNR institutes

ISTP – Istituto per la Scienza e Tecnologia dei Plasmi

ID: 478369

Year: 2023

Type: Articolo in rivista

Creation: 2023-02-23 09:33:44.000

Last update: 2023-06-19 09:58:56.000

External IDs

CNR OAI-PMH: oai:it.cnr:prodotti:478369

DOI: 10.1016/j.fusengdes.2023.113472

ISI Web of Science (WOS): 000925301700001

Scopus: 2-s2.0-85149747164