Title :
High heat flux experiments at JAERI
Author :
Akiba, M. ; Araki, M. ; Dairaku, M. ; Fukaya, K. ; Horie, T. ; Iida, K. ; Ise, H. ; Mizuno, M. ; Ogawa, M. ; Ohara, Y. ; Okumura, Y. ; Seki, M. ; Takatsu, H. ; Tanaka, S. ; Watanabe, K. ; Yokoyama, K.
Author_Institution :
Plasma Heating Lab. I, JAERI, Ibaraki, Japan
Abstract :
Recent R&D results on high-heat flux components are presented, including construction of a new test stand. The test stand can extract an electron beam of 4.1 at 100 keV. E-folding divergence of the beam is 1.7 mrad, and the latest beam performance is also described. At the original test stand, which can produce hydrogen-ion beams of 50 A at 100 keV for 10 s, high-Z divertor armors, were tested. Tungsten plates brazed on copper blocks have been proven to have enough durability against heat flux under 10 MW/m2. Carbon-fiber-carbon (CFC) composites were tested at the new electron-beam test stand and an electron-beam welding machine. Under disruption-simulation conditions, evaporation weight loss of CFC was lower than that of isotropic graphite
Keywords :
fusion reactor materials; E-folding divergence; disruption-simulation conditions; electron-beam welding machine; high-Z divertor armors; high-heat flux components; isotropic graphite; test stand; Acceleration; Electron beams; Frequency; Inverters; Life estimation; Materials testing; Plasma accelerators; Power supplies; Voltage; Water heating;
Conference_Titel :
Fusion Engineering, 1989. Proceedings., IEEE Thirteenth Symposium on
Conference_Location :
Knoxville, TN
DOI :
10.1109/FUSION.1989.102275
