http://www.cnr.it/ontology/cnr/individuo/prodotto/ID211784

Design and R&D for manufacturing the MITICA Neutraliser and Electron Dump (Articolo in rivista)

Type

Prodotto della ricerca (Classe)
Articolo in rivista (Classe)

Label

Design and R&D for manufacturing the MITICA Neutraliser and Electron Dump (Articolo in rivista) (literal)

Anno

2013-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

10.1016/j.fusengdes.2013.01.018 (literal)

Alternative label

Mauro Dalla Palma; Emanuele Sartori; Winder Gonzalez; Andrea Tiso, Lauro Trevisan; Pierluigi Zaccaria (2013)
Design and R&D for manufacturing the MITICA Neutraliser and Electron Dump
in Fusion engineering and design; ELSEVIER SCIENCE SA, PO BOX 564, 1001 LAUSANNE (Svizzera)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Mauro Dalla Palma; Emanuele Sartori; Winder Gonzalez; Andrea Tiso, Lauro Trevisan; Pierluigi Zaccaria (literal)

Pagina inizio

1020 (literal)

Pagina fine

1024 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#altreInformazioni

Available online 14 February 2013, E-ISSN: 1873-7196. Proceedings of the 27th Symposium On Fusion Technology (SOFT-27); Liège, Belgium, September 24-28, 2012 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url

http://www.sciencedirect.com/science/article/pii/S0920379613000197 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

88 (literal)

Rivista

Fusion engineering and design (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali

5 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo

6-8 (literal)

Note

ISI Web of Science (WOS) (literal)
Scopu (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

1,4,5,6 : Consorzio RFX, Associazione Euratom-ENEA sulla Fusione, Padova, Italy; / 2,3 : Università degli Studi di Padova, Padova, Italy. (literal)

Titolo

Design and R&D for manufacturing the MITICA Neutraliser and Electron Dump (literal)

Abstract

One MeV negative particle beam accelerated in the beam source of the ITER Neutral Beam Injectors (NBIs) will be neutralised in the Neutraliser gas cell. Four narrow beam channels are foreseen in the Neutraliser where the neutralisation process will occur with controlled gas pressure being the four channels delimited by five copper wall panels. Stray particles will be dumped on the copper Electron Dump and CuCrZr leading edges to be installed at the Neutraliser frontal section: the Electron Dump will intercept stray electrons in order to reduce the cryo pump thermal load; enhanced heat transfer in subcooled boiling conditions will occur in the panel leading edges with twisted tapes as turbulence promoters. The copper panels will be thermally controlled by means of embedded cooling circuits; thermo-hydraulic and thermo-mechanical analyses and verifications have been carried out considering several load combinations and satisfying the design rules as for ITER structural design criteria for in vessel components. Gas flow analyses have been carried out with molecular flow in the in-vessel vacuum environment to evaluate the gas pressure profile along the beam line also considering the presence of the Electron Dump. Furthermore, transient analyses of the gas flow inside channels have been performed to simulate the effect of last valve closure; analysis results demonstrate that gas flow variations can be detected by thermal measurements. The Neutraliser assembly, installation, and positioning inside the vacuum vessel have been verified considering alignment requirements and remote handling compatibility with twistlock crane, bolting tool, and pipe joint interfaces. The Neutraliser and Electron Dump will be instrumented with thermocouples foreseen for component protection, thermal control, beam diagnostic, and calorimetry. Additional thermocouples, accelerometers as boiling detectors, and further diagnostics for component monitoring and beam characterisation are also foreseen in the NBI prototype located in Padua and named MITICA. Qualification and factory tests have been determined according to the required standards and on-site acceptance tests have been preliminarily identified. Some technological issues, common to other beam line components of ITER NBIs, have been investigated by carrying out R&D activities which are also presented in the paper. (literal)

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