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TJ-II:Neutral Beam Injection: Difference between revisions
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=== Calorimeter === | === Calorimeter === | ||
[[File:TJ-II NBI Calorimeter.jpg|400px|thumb|right|The target calorimeter in its operating position. Only part of the vacuum vessel is shown. The neutral beam is injected from the right]] | [[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 | 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>[http://link.aip.org/link/?RSINAK/77/10E519/1 C. Fuentes et al, ''Thermographic calorimetry of the neutral beam injectors heating beams at TJ-II'', Rev. Sci. Instrum. '''77''' (2006) 10E519]</ref> | <ref>[http://link.aip.org/link/?RSINAK/77/10E519/1 C. Fuentes et al, ''Thermographic calorimetry of the neutral beam injectors heating beams at TJ-II'', Rev. Sci. Instrum. '''77''' (2006) 10E519]</ref> | ||
<ref>[http://dx.doi.org/10.1016/j.fusengdes.2007.07.054 C. Fuentes et al, ''Power transmission of the neutral beam heating beams at TJ-II'', Fusion Engineering and Design '''82''', Issues 5-14 (2007) 926-932]</ref> | <ref>[http://dx.doi.org/10.1016/j.fusengdes.2007.07.054 C. Fuentes et al, ''Power transmission of the neutral beam heating beams at TJ-II'', Fusion Engineering and Design '''82''', Issues 5-14 (2007) 926-932]</ref> | ||