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High rate measurements of the neutron camera and broadband neutron spectrometer at JET
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
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2015 (English)In: Physics Procedia, Vol. 62, 124-8 p.Article in journal (Refereed) PublishedText
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. [All rights reserved Elsevier].

Place, publisher, year, edition, pages
2015. Vol. 62, 124-8 p.
National Category
Fusion, Plasma and Space Physics
Research subject
Physics with specialization in Applied Nuclear Physics
URN: urn:nbn:se:uu:diva-286997DOI: 10.1016/j.phpro.2015.02.023ISI: 15396064OAI: oai:DiVA.org:uu-286997DiVA: diva2:922210
Available from: 2016-04-22 Created: 2016-04-22 Last updated: 2016-04-22

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Conroy, Sean
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