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TJ-II:Neutral Beam Injection: Difference between revisions
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<ref>J. Guasp, M. Liniers, C. Fuentes, and G. Barrera, ''Thermal load calculations at TJ-II vacuum vessel under NBI,'' [http://www.new.ans.org/store/j_75 Fusion Tech., '''35''', pp. 32-41 (1999)]</ref> | <ref>J. Guasp, M. Liniers, C. Fuentes, and G. Barrera, ''Thermal load calculations at TJ-II vacuum vessel under NBI,'' [http://www.new.ans.org/store/j_75 Fusion Tech., '''35''', pp. 32-41 (1999)]</ref> | ||
<ref>C. Fuentes et al, ''Neutral beam injection optimization at TJ-II'', [[doi:10.1016/j.fusengdes.2005.06.315|Fusion Engineering and Design '''74''', Issues 1-4 (2005) 249-253]]</ref> | <ref>C. Fuentes et al, ''Neutral beam injection optimization at TJ-II'', [[doi:10.1016/j.fusengdes.2005.06.315|Fusion Engineering and Design '''74''', Issues 1-4 (2005) 249-253]]</ref> | ||
NBI1 is located in [[TJ-II:Sectors|sector]] D8. | NBI1 is located in [[TJ-II:Sectors|sector]] D8. | ||
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[[File:TJ-II NBI Calorimeter.jpg|400px|thumb|right|The target calorimeter (red) in its operating position. Only part of the vacuum vessel is shown. The neutral beam is injected from the right. The infrared (IR) camera (below) views the calorimeter via a mirror]] | [[File:TJ-II NBI Calorimeter.jpg|400px|thumb|right|The target calorimeter (red) in its operating position. Only part of the vacuum vessel is shown. The neutral beam is injected from the right. The infrared (IR) camera (below) views the calorimeter via a mirror]] | ||
A carbon fiber composite (CFC) target calorimeter has been installed to study the power density distribution of the neutral beams in situ. The thermographic print of the beam can be recorded using an infrared camera, permitting a reliable analysis due to the highly anisotropic thermal conductivity of the target material. Direct conversion from temperature to power density is possible due to independent thermocouple measurements on two adiabatically mounted copper buttons. With the combined thermographic and calorimetric measurements it has been possible to determine the power density distribution of the beams. | A carbon fiber composite (CFC) target calorimeter has been installed to study the power density distribution of the neutral beams in situ. The thermographic print of the beam can be recorded using an infrared camera, permitting a reliable analysis due to the highly anisotropic thermal conductivity of the target material. Direct conversion from temperature to power density is possible due to independent thermocouple measurements on two adiabatically mounted copper buttons. With the combined thermographic and calorimetric measurements it has been possible to determine the power density distribution of the beams. | ||
<ref>C. Fuentes et al, ''Thermographic calorimetry of the neutral beam injectors heating beams at TJ-II'', [ | <ref>C. Fuentes et al, ''Thermographic calorimetry of the neutral beam injectors heating beams at TJ-II'', [[doi:10.1063/1.2220067|Rev. Sci. Instrum. '''77''' (2006) 10E519]]</ref> | ||
<ref>C. Fuentes et al, ''Power transmission of the neutral beam heating beams at TJ-II'', [[doi:10.1016/j.fusengdes.2007.07.054|Fusion Engineering and Design '''82''', Issues 5-14 (2007) 926-932]]</ref> | <ref>C. Fuentes et al, ''Power transmission of the neutral beam heating beams at TJ-II'', [[doi:10.1016/j.fusengdes.2007.07.054|Fusion Engineering and Design '''82''', Issues 5-14 (2007) 926-932]]</ref> | ||
<ref>[[Media:Master_thesis_julius_damba.pdf|J. Damba, ''Beam Transmission Monitoring of the TJ-II Neutral Beam Injectors'', European Master of Science in Nuclear Fusion Physics and Engineering (Erasmus Mundus Programme, 2014)]]</ref> | <ref>[[Media:Master_thesis_julius_damba.pdf|J. Damba, ''Beam Transmission Monitoring of the TJ-II Neutral Beam Injectors'', European Master of Science in Nuclear Fusion Physics and Engineering (Erasmus Mundus Programme, 2014)]]</ref> | ||
=== Power and particle balance === | |||
In the analysis of the confinement and transport properties of NBI heated plasmas, a proper evaluation of the power and particle balance is necessary. In order to achieve that, a number of experimental studies have been carried out to determine the beam power transmission and beam contribution to plasma fuelling. | |||
<ref>M. Liniers, G. Wolfers, et al., ''Beamline duct monitoring of the TJ-II Neutral Beam Injectors'', [[doi:10.1016/j.fusengdes.2013.04.014|Fusion Engineering and Design '''88''', Issues 6-8 (2013) 960-963]]</ref> | |||
<ref>M. Liniers, J. Damba, et al., ''Beam transmission dependence on beam parameters for TJ-II Neutral Beam Injectors '', [[doi:10.1016/j.fusengdes.2017.05.104|Fusion Engineering and Design (2017) ]]</ref> | |||
==References== | ==References== | ||
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