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High rate measurements of the neutron camera and broadband neutron spectrometer at JET
Culham Sci Ctr, CCFE, Abingdon OX14 3DB, Oxon, England; Univ Milano Bicocca, Dept Phys, Milan, Italy.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics. Culham Sci Ctr, CCFE, Abingdon OX14 3DB, Oxon, England.
Assoc EURATOM ENEA Fus, Rome, Italy.
Univ Milano Bicocca, Dept Phys, Milan, Italy; Ist Fis Plasma Piero Caldirola, Milan, Italy.
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2015 (English)Conference paper, Published paper (Refereed)
Resource type
Text
Abstract [en]

The Joint European Torus (JET, Culham, UK) is the largest tokamak in the world. JET has been upgraded over the years and recently it has also become a test facility of the components designed for ITER, the next step fusion machine under construction in Cadarache (France). At JET, the neutron emission profile of Deuterium (D) or Deuterium-Tritium (DT) plasmas is reconstructed using the neutron camera (KN3). In 2010 KN3 was equipped with a new digital data acquisition system (DAQ) based on Field Programmable Gated Array (FPGA). According to specifications, the DAQ is capable of high rate measurements up to 0.5 MCps. A new compact broadband spectrometer (KM12) based on BC501A organic liquid scintillating material was also installed in the same year and implements a similar DAQ as for KN3. This article illustrates the observations on the DAQ high count rate performance of both KN3 and KM12 in the latest JET D plasma experiments related to hybrid scenario and runaway electrons. For the latter, >1 MCps event rate was achieved with consequences on the behavior of the FPGA and on the reliability of the measurements.

Place, publisher, year, edition, pages
2015. Vol. 62, 124-128 p.
Series
Physics Procedia, ISSN 1875-3892 ; 62
National Category
Fusion, Plasma and Space Physics
Research subject
Physics with specialization in Applied Nuclear Physics
Identifiers
URN: urn:nbn:se:uu:diva-286997DOI: 10.1016/j.phpro.2015.02.023ISI: 000380486100020OAI: oai:DiVA.org:uu-286997DiVA: diva2:922210
Conference
3Rd International Conference Frontiers In Diagnostic Technologies,, ICFDT3 2013
Available from: 2016-04-22 Created: 2016-04-22 Last updated: 2016-12-06Bibliographically approved

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Conroy, Sean

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