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TJ-II:Neutral Beam Injection: Difference between revisions
→Calorimeter
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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]] | |||
A carbon fiber composite (CFC) target calorimeter has been installed to study in situ the power density distribution of the neutral beams. The thermographic print of the beam can be recorded and analysed in a reliable way due to the highly anisotropic thermal conductivity of the target material. Direct conversion from temperature to power density is possible due to the 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 in situ the power density distribution of the neutral beams. The thermographic print of the beam can be recorded and analysed in a reliable way due to the highly anisotropic thermal conductivity of the target material. Direct conversion from temperature to power density is possible due to the 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> | ||