dc.creator | Batistoni, P. | es |
dc.creator | Popovichev, S. | es |
dc.creator | Cufar, A. | es |
dc.creator | Ghani, Z. | es |
dc.creator | Giacomelli, L. | es |
dc.creator | Jet Contributors | es |
dc.creator | García Muñoz, Manuel | es |
dc.date.accessioned | 2020-07-20T14:33:54Z | |
dc.date.available | 2020-07-20T14:33:54Z | |
dc.date.issued | 2018-02 | |
dc.identifier.citation | Batistoni, P., Popovichev, S., Cufar, A., Ghani, Z., Giacomelli, L., Jet Contributors, y García Muñoz, M. (2018). 14 MeV calibration of JET neutron detectors-phase 1: calibration and characterization of the neutron source. Nuclear Fusion, 58 (2), 1-24. | |
dc.identifier.issn | 1741-4326 | es |
dc.identifier.uri | https://hdl.handle.net/11441/99663 | |
dc.description.abstract | In view of the planned DT operations at JET, a calibration of the JET neutron monitors at
14 MeV neutron energy is needed using a 14 MeV neutron generator deployed inside the
vacuum vessel by the JET remote handling system. The target accuracy of this calibration
is ±10% as also required by ITER, where a precise neutron yield measurement is important,
e.g. for tritium accountancy. To achieve this accuracy, the 14 MeV neutron generator selected
as the calibration source has been fully characterised and calibrated prior to the in-vessel
calibration of the JET monitors. This paper describes the measurements performed using
different types of neutron detectors, spectrometers, calibrated long counters and activation
foils which allowed us to obtain the neutron emission rate and the anisotropy of the neutron
generator, i.e. the neutron flux and energy spectrum dependence on emission angle, and to
derive the absolute emission rate in 4π sr. The use of high resolution diamond spectrometers
made it possible to resolve the complex features of the neutron energy spectra resulting from
the mixed D/T beam ions reacting with the D/T nuclei present in the neutron generator target.
As the neutron generator is not a stable neutron source, several monitoring detectors were
attached to it by means of an ad hoc mechanical structure to continuously monitor the neutron
emission rate during the in-vessel calibration. These monitoring detectors, two diamond
diodes and activation foils, have been calibrated in terms of neutrons/counts within ±5% total
uncertainty. A neutron source routine has been developed, able to produce the neutron spectra
resulting from all possible reactions occurring with the D/T ions in the beam impinging on
the Ti D/T target. The neutron energy spectra calculated by combining the source routine with
a MCNP model of the neutron generator have been validated by the measurements. These
numerical tools will be key in analysing the results from the in-vessel calibration and to derive
the response of the JET neutron detectors to DT plasma neutrons starting from the response to
the generator neutrons, and taking into account all the calibration circumstances. | es |
dc.description.sponsorship | EURATOM 633053 | es |
dc.format | application/pdf | es |
dc.format.extent | 25 p. | es |
dc.language.iso | eng | es |
dc.publisher | IOP Publishing | es |
dc.relation.ispartof | Nuclear Fusion, 58 (2), 1-24. | |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internacional | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.subject | Neutron calibration | es |
dc.subject | Neutron generator | es |
dc.subject | Fusion reactor | es |
dc.title | 14 MeV calibration of JET neutron detectors-phase 1: calibration and characterization of the neutron source | es |
dc.type | info:eu-repo/semantics/article | es |
dcterms.identifier | https://ror.org/03yxnpp24 | |
dc.type.version | info:eu-repo/semantics/publishedVersion | es |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es |
dc.contributor.affiliation | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear | es |
dc.relation.projectID | 633053 | es |
dc.relation.publisherversion | https://doi.org/10.1088/1741-4326/aa98f6 | es |
dc.identifier.doi | 10.1088/1741-4326/aa98f6 | es |
dc.contributor.group | Universidad de Sevilla. RNM138: Física Nuclear Aplicada | es |
dc.journaltitle | Nuclear Fusion | es |
dc.publication.volumen | 58 | es |
dc.publication.issue | 2 | es |
dc.publication.initialPage | 1 | es |
dc.publication.endPage | 24 | es |