In situ in-reactor testing of potential bolometer materials for ITER plasma diagnostics

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We present the results of in-reactor irradiation up to a total dose of 0.01 dpa (Al) of two prototype bolometers with a Pt-meander on AlN and Al2O3 ceramic substrates to test their radiation resistance. A dedicated vacuum capsule with a hot stainless steel holder for the bolometers was designed and fabricated in order to allow irradiation at 400°C in vacuum. The holder was heated with gamma-radiation. The Pt-meander and substrate electrical resistances were measured in situ. Direct electrical measurements show that the Pt-meander on both substrates will sustain radiation fluences up to 0.001 dpa (Al). Post-radiation inspection indicates that they will survive up to at least 0.01 dpa (Al).


Original languageEnglish
Pages (from-to)1179-1184
Journalfusion engineering and design
Issue number5-14
Publication statusPublished - Oct 2007
Event24th Symposium on Fusion Technology - SOFT, Warsaw, Poland
Duration: 11 Sep 200615 Sep 2006


  • ITER, bolometer, transmutation, radiation induced insulation degradation

ID: 120779