Articolo in rivista, 2021, ENG, 10.1016/j.fusengdes.2021.112424
Sartori E.; Brombin M.; Laterza B.; Zuin M.; Cavazzana R.; Cervaro V.; Degli Agostini F.; Fadone M.; Fasolo D.; Grando L.; Jain P.; Kisaki M.; Maistrello A.; Moro G.; Pimazzoni A.; Poggi C.; Segalini B.; Shepherd A.; Spolaore M.; Taliercio C.; Tollin M.; Ugoletti M.; Veltri P.; Zamengo A.; Serianni G.
Consorzio RFX (CNR, ENEA, INFN, UNIPD, Acciaierie Venete SpA), Padova, Italy; CNR ISTP, Istituto per la Scienza e Tecnologia dei Plasmi, Sede di Padova, Italy; National Institute for Fusion Science, National Institutes of Natural Sciences, Toki, Japan; Università degli studi di Padova, Italy; CCFE, Culham Science Centre, Abingdon, Oxon, UK; ITER Organization, St. Paul-lez-Durance, France.
We present the development and first use of a set of movable electrostatic probes on the full-scale ITER heating neutral beam prototype negative-ion source SPIDER. The probes access the ion source plasma from the multi-aperture accelerator aiming at the study of the plasma formation and expansion from the RF drivers through the transverse magnetic filter. The magnetic filter separates the relatively high electron-temperature region for plasma formation and hydrogen dissociation form the negative-ion extraction region in which low electron-temperature is required to avoid negative-ion destruction, but also causes non-uniformities and drifts in the large plasma discharge which will be studied by this setup. The set of electrostatic probes encompasses eight RF-compensated Langmuir probes, one double probe, one Mach probe for the assessment of plasma drift velocities, and two gridded retarding field energy analyzers to measure the positive-ion energy distribution function. Electric aspects as well as mechanical constraints given by the large in-vacuum movable structure, and thermal requirements of these relatively heat-flux components made the design challenging. Prototyping and commissioning of the measurement system is discussed offering examples of measured characteristics with the various probes.
Fusion engineering and design (Print) 169 , pp. 112424-1–112424-7
Electrostatic probes, Beam sources, Negative ions, ITER heating neutral beam injector
Cervaro Vannino, Taliercio Cesare, Serianni Gianluigi, Grando Luca, Spolaore Monica, Zuin Matteo, Brombin Matteo, Degli Agostini Fabio
ID: 450287
Year: 2021
Type: Articolo in rivista
Creation: 2021-03-30 09:03:19.000
Last update: 2022-09-21 16:54:12.000
CNR institutes
External links
OAI-PMH: Dublin Core
OAI-PMH: Mods
OAI-PMH: RDF
DOI: 10.1016/j.fusengdes.2021.112424
URL: https://www.sciencedirect.com/science/article/abs/pii/S0920379621002003
External IDs
CNR OAI-PMH: oai:it.cnr:prodotti:450287
DOI: 10.1016/j.fusengdes.2021.112424
Scopus: 2-s2.0-85102843208
ISI Web of Science (WOS): 000672578400009