Learning Centre

Neutron rate estimates in MAST based on gyro-orbit modelling of fast ions

 |  Login

Show simple item record

dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Sperduti, A.
dc.contributor.author Cecconello, M.
dc.contributor.author Conroy, S.
dc.contributor.author Snicker, A.
dc.date.accessioned 2021-01-25T10:11:55Z
dc.date.available 2021-01-25T10:11:55Z
dc.date.issued 2021-01
dc.identifier.citation Sperduti , A , Cecconello , M , Conroy , S & Snicker , A 2021 , ' Neutron rate estimates in MAST based on gyro-orbit modelling of fast ions ' , Nuclear Fusion , vol. 61 , no. 1 , 016028 . https://doi.org/10.1088/1741-4326/abc433 en
dc.identifier.issn 0029-5515
dc.identifier.issn 1741-4326
dc.identifier.other PURE UUID: 56849c7c-5f36-45d2-8b1d-b56e3429ea47
dc.identifier.other PURE ITEMURL: https://research.aalto.fi/en/publications/56849c7c-5f36-45d2-8b1d-b56e3429ea47
dc.identifier.other PURE LINK: http://www.scopus.com/inward/record.url?scp=85098288866&partnerID=8YFLogxK
dc.identifier.other PURE FILEURL: https://research.aalto.fi/files/54825782/SCI_Snicker_Neutron_Rate.PAPER_NF.pdf
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/102151
dc.description | openaire: EC/H2020/633053/EU//EUROfusion
dc.description.abstract A discrepancy between predicted and measured neutron rates on MAST using TRANSP/NUBEAM has previously been observed and a correction factor of about 0.6 was needed to match the two: this correction factor could not be accounted for by the experimental uncertainties in the plasma kinetic profiles nor in the NBI energy and power (Cecconello et al 2019 Nucl. Fusion 59 016006). Further causes of this discrepancy are here studied by means of TRANSP/NUBEAM and ASCOT/BBNBI simulations. Different equilibria, toroidal field ripples, uncertainties on the NBI divergence value and gyro-orbit effects were studied and simulations were performed with both transport codes. It was found that the first three effects accounted for only a 5% variation in the fast ion density. On the other hand, full gyro-orbit simulations of the fast ions dynamics carried out in ASCOT/BBNBI resulted in an approximately 20% reduction of the fast ion population compared to TRANSP/NUBEAM. A detailed analysis of the fast ion distributions showed howthe drop occurred regardless of the energy at pitch values -0.4. The DRESS code was then used to calculate the neutron rate at the neutron camera detector's location showing that the discrepancy is considerably reduced when the full gyro-orbit fast ion distribution is used, with now the correction factor, used to match experimental and predicted neutron rates, being around 0.9. en
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher IOP Publishing Ltd.
dc.relation info:eu-repo/grantAgreement/EC/H2020/633053/EU//EUROfusion
dc.relation.ispartofseries Nuclear Fusion en
dc.relation.ispartofseries Volume 61, issue 1 en
dc.rights openAccess en
dc.title Neutron rate estimates in MAST based on gyro-orbit modelling of fast ions en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Uppsala University
dc.contributor.department Department of Applied Physics
dc.identifier.urn URN:NBN:fi:aalto-202101251461
dc.identifier.doi 10.1088/1741-4326/abc433
dc.date.embargo info:eu-repo/date/embargoEnd/2021-12-10

Files in this item

Files Size Format View

There are no open access files associated with this item.

This item appears in the following Collection(s)

Show simple item record

Search archive

Advanced Search

article-iconSubmit a publication