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Journal Articles

Development of reliable diamond window for EC launcher on fusion reactors

Takahashi, Koji; Illy, S.*; Heidinger, R.*; Kasugai, Atsushi; Minami, Ryutaro; Sakamoto, Keishi; Thumm, M.*; Imai, Tsuyoshi

Fusion Engineering and Design, 74(1-4), p.305 - 310, 2005/11

 Times Cited Count:13 Percentile:68.06(Nuclear Science & Technology)

A new diamond window with the copper-coated edge for an EC launcher is developed. The diamond window is designed to cool its disk edge. Since Cu is coated at the entire edge, ingress of cooling water into a transmission line in case of failure on the edge is negligible. In addition, corrosion of Al blaze between the edge and the Inconel cuffs can be avoided. A 170GHz, RF transmission experiment equivalent to a MW-level transmission was carried out to investigate the capability of the edge cooling. The transmission power and pulse are 55kW and 3sec, respectively. Temperature increase was 45$$^{circ}$$C and alomost became constant. Thermal calculation with tan$$delta$$ of 4.4$$times$$10$$^{-4}$$ and thermal conductivity of 1.9kW/m/K agrees with the experiment. Since tan$$delta$$ of the diamond is much higher than the actual one (tan$$delta$$=2$$times$$10$$^{-5}$$), the temperature increase corresponds to that of 1MW transmission. It concludes that the Cu coating dose not degrade the edge cooling capability and improves the reliability of the diamond window.

Oral presentation

Solidification test of B-C-Fe-O melt in the PLINIUS/VITI facility

Ikeuchi, Hirotomo; Piluso, P.*; Fouquart, P.*; Bailly, J. S.*; Brackx, E.*; David, C.*; Domenger, R.*; Excoffier, E.*

no journal, , 

In order to clarify chemical forms of boron after the solidification of the B-C-Fe-O melt with low oxygen concentration, small-scale experiments were performed at the PLINIUS/VITI facility in CEA-Cadarache under the framework of JAEA-CEA collaboration in 2015FY. The overview of the experiment will be presented briefly during the SARNET annual meeting.

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