FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2908032946> ?p ?o ?g. }

• W2908032946 abstract "The high-Q operation of the ITER tokamak will require two Neutral Beam Injectors (NBIs) for plasma heating and current drive. Each beam will be generated by a 40 A current of Deuterium negative ions, accelerated up to the specific energy of 1 MeV and then neutralized. The power delivered to the plasma by each NBI shall reach 16 MW with a duration up to 1 h. The beam source will be constituted by an RF-driven negative ion source at –1 MV potential, by a Multi-Aperture, Multi-Grid (MAMuG) electrostatic accelerator (consisting of 5 stages at intermediate potentials), and a gas-box neutralizer at ground potential. All components will be installed in a vacuum vessel (also at ground potential), together with a high-capacity cryo-pumping system which controls of the background gas pressure.In order to validate the ITER NBI design and address all the outstanding issues related to these demanding requirements, a full scale prototype called MITICA (Megavolt ITER Injector & Concept Advancement), is under construction in Padova at Consorzio RFX. Voltage insulation in vacuum and/or very low-pressure gas on a single gap is indeed one of the expected issues which MITICA will have to deal with.In this paper, a numerical tool, called Voltage Holding Prediction Model (VHPM) and based on the clumps theory in vacuum, is applied to the MITICA beam source for evaluating and optimizing the high voltage insulation of the experiment. The tool parameters have been recently “calibrated” based on the (few) experimental results presently available in the case of large gaps. Since the initial results suggest that the breakdown probability will be rather high when the beam source will operate at nominal voltage (-1MV), preemptive solutions for increasing the voltage holding capability in the gaps between the beam source, the accelerator grids and the vacuum vessel have been considered ad compared.A very effective solution for increasing the voltage holding capability of the system consists in the use of an intermediate electrostatic shield between the source and the vessel. Using the above-mentioned numerical tool, a conceptual design of such intermediate electrostatic shield has been developed and optimized, taking into account also mechanical constraints, and the effects of the presence of the shield on the background gas pressure distribution. Finally also an experimental program for anticipating the full-scale voltage holding tests is studied and proposed, using the real MITICA vacuum vessel (on-site) together with a beam source mock-up (with a simple geometry) without and with an intermediate electrostatic shield, in order to get a first voltage holding characterization of the vacuum vessel, to evaluate the effect of the shield, and to benchmark the VHPM for large gaps." @default.
• W2908032946 created "2019-01-11" @default.
• W2908032946 creator A5013468785 @default.
• W2908032946 creator A5018893080 @default.
• W2908032946 creator A5022025514 @default.
• W2908032946 creator A5025663758 @default.
• W2908032946 creator A5044606197 @default.
• W2908032946 creator A5049101373 @default.
• W2908032946 creator A5067589942 @default.
• W2908032946 creator A5085622855 @default.
• W2908032946 creator A5087811997 @default.
• W2908032946 date "2018-01-01" @default.
• W2908032946 modified "2023-09-26" @default.
• W2908032946 title "MITICA intermediate electrostatic shield: Concept design, development, and first experimental tests identification" @default.
• W2908032946 cites W2012183992 @default.
• W2908032946 cites W2021383010 @default.
• W2908032946 cites W2113843804 @default.
• W2908032946 cites W2133075728 @default.
• W2908032946 cites W2494294214 @default.
• W2908032946 cites W2750578515 @default.
• W2908032946 cites W2773815486 @default.
• W2908032946 cites W4312246267 @default.
• W2908032946 cites W4367329931 @default.
• W2908032946 doi "https://doi.org/10.1063/1.5083730" @default.
• W2908032946 hasPublicationYear "2018" @default.
• W2908032946 type Work @default.
• W2908032946 sameAs 2908032946 @default.
• W2908032946 citedByCount "4" @default.
• W2908032946 countsByYear W29080329462020 @default.
• W2908032946 countsByYear W29080329462022 @default.
• W2908032946 countsByYear W29080329462023 @default.
• W2908032946 crossrefType "proceedings-article" @default.
• W2908032946 hasAuthorship W2908032946A5013468785 @default.
• W2908032946 hasAuthorship W2908032946A5018893080 @default.
• W2908032946 hasAuthorship W2908032946A5022025514 @default.
• W2908032946 hasAuthorship W2908032946A5025663758 @default.
• W2908032946 hasAuthorship W2908032946A5044606197 @default.
• W2908032946 hasAuthorship W2908032946A5049101373 @default.
• W2908032946 hasAuthorship W2908032946A5067589942 @default.
• W2908032946 hasAuthorship W2908032946A5085622855 @default.
• W2908032946 hasAuthorship W2908032946A5087811997 @default.
• W2908032946 hasBestOaLocation W29080329461 @default.
• W2908032946 hasConcept C116515362 @default.
• W2908032946 hasConcept C116915560 @default.
• W2908032946 hasConcept C119599485 @default.
• W2908032946 hasConcept C120665830 @default.
• W2908032946 hasConcept C121332964 @default.
• W2908032946 hasConcept C127413603 @default.
• W2908032946 hasConcept C135186712 @default.
• W2908032946 hasConcept C165801399 @default.
• W2908032946 hasConcept C168834538 @default.
• W2908032946 hasConcept C185544564 @default.
• W2908032946 hasConcept C188224857 @default.
• W2908032946 hasConcept C192562407 @default.
• W2908032946 hasConcept C78519656 @default.
• W2908032946 hasConcept C82706917 @default.
• W2908032946 hasConcept C88182573 @default.
• W2908032946 hasConceptScore W2908032946C116515362 @default.
• W2908032946 hasConceptScore W2908032946C116915560 @default.
• W2908032946 hasConceptScore W2908032946C119599485 @default.
• W2908032946 hasConceptScore W2908032946C120665830 @default.
• W2908032946 hasConceptScore W2908032946C121332964 @default.
• W2908032946 hasConceptScore W2908032946C127413603 @default.
• W2908032946 hasConceptScore W2908032946C135186712 @default.
• W2908032946 hasConceptScore W2908032946C165801399 @default.
• W2908032946 hasConceptScore W2908032946C168834538 @default.
• W2908032946 hasConceptScore W2908032946C185544564 @default.
• W2908032946 hasConceptScore W2908032946C188224857 @default.
• W2908032946 hasConceptScore W2908032946C192562407 @default.
• W2908032946 hasConceptScore W2908032946C78519656 @default.
• W2908032946 hasConceptScore W2908032946C82706917 @default.
• W2908032946 hasConceptScore W2908032946C88182573 @default.
• W2908032946 hasLocation W29080329461 @default.
• W2908032946 hasOpenAccess W2908032946 @default.
• W2908032946 hasPrimaryLocation W29080329461 @default.
• W2908032946 hasRelatedWork W2001191669 @default.
• W2908032946 hasRelatedWork W2009567882 @default.
• W2908032946 hasRelatedWork W2046460970 @default.
• W2908032946 hasRelatedWork W2099848327 @default.
• W2908032946 hasRelatedWork W2120905440 @default.
• W2908032946 hasRelatedWork W2358717860 @default.
• W2908032946 hasRelatedWork W2394308771 @default.
• W2908032946 hasRelatedWork W2594254420 @default.
• W2908032946 hasRelatedWork W2594884365 @default.
• W2908032946 hasRelatedWork W4200231759 @default.
• W2908032946 isParatext "false" @default.
• W2908032946 isRetracted "false" @default.
• W2908032946 magId "2908032946" @default.
• W2908032946 workType "article" @default.