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Velocity-space sensitivity of the neutron camera on MAST
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
Culham Sci Ctr, Culham Ctr Fus Energy, Abingdon OX14 3DB, Oxon, England.
2019 (English)In: Journal of Instrumentation, ISSN 1748-0221, E-ISSN 1748-0221, Vol. 14, article id C09005Article in journal (Refereed) Published
Abstract [en]

The Neutron Camera installed at the Mega Ampere Spherical Tokamak (MAST) provided fundamental information regarding the neutron emission and the behavior of fast ions. The signal measured by the Neutron Camera depended on its observation direction relative to the plasma region. Furthermore, only a certain part of the energy-pitch region contributed to the measured signal. This region is determined by the fast ion Weight Functions. In this paper, the Weight Functions of the Neutron Camera are calculated using DRESS. The results show that the instrument is most sensitive to neutrons created in fusion reactions involving a thermal ion and an ion in the beam energy region. Synthetic spectra are also calculated and, after folding with the detector's response function, compared with experimental pulse height spectra for three selected plasma discharges. Also, Weight Functions for the Neutron Camera Upgrade on MAST-U are calculated and discussed. The results can be applied for future fast ion studies at MAST-U, combining Neutron Camera Upgrade data with those of other fast ion diagnostics, such as Fast Ion Deuterium Alpha and the Neutral Particle Analyzer diagnostics.

Place, publisher, year, edition, pages
IOP PUBLISHING LTD , 2019. Vol. 14, article id C09005
Keywords [en]
Neutron detectors (cold, thermal, fast neutrons), Nuclear instruments and methods for hot plasma diagnostics
National Category
Fusion, Plasma and Space Physics Accelerator Physics and Instrumentation
Identifiers
URN: urn:nbn:se:uu:diva-395549DOI: 10.1088/1748-0221/14/09/C09005ISI: 000486989800005OAI: oai:DiVA.org:uu-395549DiVA, id: diva2:1365004
Conference
3rd European Conference on Plasma Diagnostics (ECPD), MAY 06-10, 2019, Lisbon, PORTUGAL
Funder
Swedish Research CouncilAvailable from: 2019-10-23 Created: 2019-10-23 Last updated: 2019-10-23Bibliographically approved

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Sperduti, AndreaCecconello, MarcoConroy, Sean

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