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Fusion Science and Technology
Latest News
The JT-60SA project
JT-60SA (Japan Torus-60 Super Advanced) is the world’s largest superconducting tokamak device. Its goal is the earlier realization of fusion energy (see Fig. 1). Fusion is the energy that powers the Sun, and just 1 gram of deuterium-tritium (D-T) fuel produces enormous energy—the equivalent of 8 tons of crude oil.
Last fall, the JT-60SA project announced an important milestone: the achievement of the tokamak’s first plasma. This article describes the objectives of the JT-60SA project, achievements in the operation campaign for the first plasma, and next steps.
A. G. Lipson, B. F. Lyakhov, A. S. Roussetski, T. Akimoto, T. Mizuno, N. Asami, R. Shimada, S. Miyashita, A. Takahashi
Fusion Science and Technology | Volume 38 | Number 2 | September 2000 | Pages 238-252
Technical Paper | doi.org/10.13182/FST00-A145
Articles are hosted by Taylor and Francis Online.
Low-intensity nuclear emissions (neutrons and charged particles) due to exothermic deuterium desorption from Au/Pd/PdO heterostructure loaded with deuterium by electrolysis have been studied by NE213 neutron detection as well as SSB and CR-39 charged-particle detectors in low-background conditions with large statistics. Similar measurements were performed with the Au/Pd/PdO:H heterostructure as a control. It has been established that in experiments with the Au/Pd/PdO:D system, the excessive 2.45-MeV neutrons and 3.0-MeV protons are better detected than with the Au/Pd/PdO:H system, where those detection rates for n and p did not exceed the cosmic background level. The levels of neutron and proton emissions for 40- to 60-m-thick samples are found to be close to one another and after subtracting background (Au/Pd/PdO:H count rate) consist of In = (19 ± 2)10-3 n/s and Ip = (4.0 ± 1.0)10-3 p/s in a 4 solid angle, respectively. These yields of D-D reaction products in Au/Pd/PdO heterostructure comply with the mean D-D reaction rate of dd ~ 10-23s-1 per D-D pair.