A neutron diagnostic for high current deuterium beams

Journal Article · Wed Feb 15 00:00:00 EST 2012 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.3673013· OSTI ID:22085916

Rebai, M; Perelli Cippo, E ^[1]; Cavenago, M; Dalla Palma, M; Pasqualotto, R; Tollin, M ^[2]; Croci, G; Gervasini, G; Ghezzi, F; Grosso, G; Tardocchi, M ^[3]; Murtas, F ^[4]; Gorini, G ^[1]

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1. CNISM, Dipartimento di Fisica, Universita degli Studi di Milano-Bicocca, Milano (Italy)
2. Consorzio RFX - Associazione Euratom-Enea sulla Fusione, corso Stati Uniti 4, I-35127 Padova (Italy)
3. Istituto di Fisica del Plasma, Associazione EURATOM-ENEA-CNR, Milano (Italy)
4. INFN, Laboratori Nazionali di Frascati, Frascati Rome (Italy)

A neutron diagnostic for high current deuterium beams is proposed for installation on the spectral shear interferometry for direct electric field reconstruction (SPIDER, Source for Production of Ion of Deuterium Extracted from RF plasma) test beam facility. The proposed detection system is called Close-contact Neutron Emission Surface Mapping (CNESM). The diagnostic aims at providing the map of the neutron emission on the beam dump surface by placing a detector in close contact, right behind the dump. CNESM uses gas electron multiplier detectors equipped with a cathode that also serves as neutron-proton converter foil. The cathode is made of a thin polythene film and an aluminium film; it is designed for detection of neutrons of energy >2.2 MeV with an incidence angle < 45 deg. CNESM was designed on the basis of simulations of the different steps from the deuteron beam interaction with the beam dump to the neutron detection in the nGEM. Neutron scattering was simulated with the MCNPX code. CNESM on SPIDER is a first step towards the application of this diagnostic technique to the MITICA beam test facility, where it will be used to resolve the horizontal profile of the beam intensity.

• OSTI ID: 22085916
• Journal Information: Review of Scientific Instruments, Vol. 83, Issue 2; Conference: ICIS 2011: 14. international conference on ion sources, Giardini-Naxos, Sicily (Italy), 12-16 Sep 2011; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALUMINIUM
CATHODES
DEUTERON BEAMS
ELECTRIC FIELDS
ELECTRON MULTIPLIER DETECTORS
INCIDENCE ANGLE
INTERFEROMETRY
ION SOURCES
MAPPING
MEV RANGE
MONTE CARLO METHOD
NEUTRON DETECTION
NEUTRON DIFFRACTION
NEUTRON EMISSION
NEUTRON-PHOTON CONVERTERS
PLASMA
POLYETHYLENES
THIN FILMS