AbstractTo develop the divertor plates for the large helical device (LHD), several kinds of brazed modules (BM) and mechanical jointed modules (MJM) have been fabricated and their thermal properties evaluated using an electron beam facility. The MJM and BM will be used as divertor plates in low heat flux (≈5 MW m−2) and high heat flux (≈10 MW m−2) phases, respectively. Results of the high heat flux tests indicate that some types of BMs satisfy the requirements for the divertor plates. For MJM, the efforts to improve the thermal properties are now being made so as to satisfy the divertor plate requirements. To optimize the design and assembly procedures, divertor mockups of the MJM have been fabricated and installed inside a vacuum vessel mock-up of LHD. The developments of these divertor components and the results of the high heat flux tests are reviewed.
大型ヘリカル装置（LHD）用のダイバータ板を開発するため、数種類のろう付けモジュール（BM）および機械的接合モジュール（MJM）を製作し、電子ビーム施設を用いてそれらの熱特性を評価した。MJMおよびBMは、それぞれ低熱流束（約5 MW m−2）相および高熱流束（約10 MW m−2）相におけるダイバータ板として使用される予定である。高熱流束試験の結果は、数種類のBMがダイバータ板の要求を満たすことを示している。MJMについては、ダイバ