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Fusion Science and Technology
Latest News
Zap Energy hits 37-million-degree electron temperatures in compact fusion device
Zap Energy announced April 23 that it has reached 1-3 keV plasma electron temperatures—roughly the equivalent of 11 to 37 million degrees Celsius—using its sheared-flow-stabilized Z-pinch approach to fusion. Reaching temperatures above that of the sun’s core (which is 10 million degrees Celsius temperature) is just one hurdle required before any fusion confinement concept can realistically pursue net gain and fusion energy.
T. Sugie, T. Hatae, Y. Koide, T. Fujita, Y. Kusama, T. Nishitani, A. Isayama, M. Sato, K. Shinohara, N. Asakura, S. Konoshima, H. Kubo, H. Takenaga, Y. Kawano, T. Kondoh, A. Nagashima, T. Fukuda, H. Sunaoshi, O. Naito, S. Kitamura, Y. Tsukahara, A. Sakasai, Y. Sakamoto, T. Suzuki, K. Tobita, M. Nemoto, A. Morioka, M. Ishikawa, S. Ishida, N. Isei, N. Oyama, Y. Neyatani, K. Itami, S. Sakurai, H. Tamai, K. Tsuchiya, S. Higashijima, T. Nakano, S. Nagaya, S. Chiba, S. Lee, M. Shitomi
Fusion Science and Technology | Volume 42 | Number 2 | September-November 2002 | Pages 482-511
Technical Paper | doi.org/10.13182/FST02-A242
Articles are hosted by Taylor and Francis Online.
The diagnostic system of JT-60U (JT-60upgrade) is composed of about 50 individual diagnostic devices. Recently, the detailed radial profile measurements of plasma parameters have been improved, so that the internal structure of plasmas could be explored. The understanding of plasma confinement has been enhanced by density and temperature fluctuation measurements using a mm-wave reflectometer and electron cyclotron emission measurements, respectively. In addition, real-time control experiments of electron density, neutron yield, radiated power, and electron temperature gradient have been carried out successfully by corresponding diagnostic devices. These measurements and the real-time control contribute to improving plasma performance. Diagnostic devices for next generation fusion devices such as a CO2 laser interferometer/polarimeter and a CO2 laser collective Thomson scattering system have been developed.