A first characterization of the NIO1 particle beam by means of a diagnostic calorimeter

A. Pimazzoni, M. Cavenago, V. Cervaro, D. Fasolo, G. Seriann, M. Tollin, P. Veltri

Research output: Contribution to conferencePaper

2 Citations (Scopus)

Abstract

Powerful neutral beam injectors (NBI) are required as heating and current drive systems for tokamaks like ITER. The development of negative ion sources and accelerators (40 A; 1 MeV D- beam) in particular, is a crucial point and many issues still require a better understanding. In this framework, the experiment NIO1 (9 beamlets of 15 mA H-each, 60 kV) operated at Consorzio RFX started operation in 2014[1]. Both its RF negative ion source (up to 2.5 kW) and its beamline are equipped with many diagnostics [2]. For the early tests on the extraction system, oxygen has been used as well as hydrogen due to its higher electronegativity, which allows reaching currents large enough to test the beam diagnostics even without caesium injection. In particular a 1D-CFC (carbon-fibre-carbon composite) tile is used as a calorimeter to determine the beam power deposition by observing the rear surface of the tile with an infra-red camera; the same design is applied as for STRIKE [3], one of the diagnostics of SPIDER (the ITER-like ion source prototype [4]) whose facility is currently under construction at Consorzio RFX. From this diagnostic it is also possible to assess the beam divergence and thus the beam optics. The present contribution describes the characterization of the NIO1 particle beam by means of temperature and current measurements with different source and accelerator parameters.
Original languageEnglish
DOIs
Publication statusPublished - 9 Aug 2017
Externally publishedYes
Event5th International Symposium on Negative Ions, Beams and Sources, NIBS 2016 - Oxford, United Kingdom
Duration: 9 Aug 2017 → …

Conference

Conference5th International Symposium on Negative Ions, Beams and Sources, NIBS 2016
CountryUnited Kingdom
CityOxford
Period9/8/17 → …

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Pimazzoni, A., Cavenago, M., Cervaro, V., Fasolo, D., Seriann, G., Tollin, M., & Veltri, P. (2017). A first characterization of the NIO1 particle beam by means of a diagnostic calorimeter. Paper presented at 5th International Symposium on Negative Ions, Beams and Sources, NIBS 2016, Oxford, United Kingdom. https://doi.org/10.1063/1.4995748