TY - JOUR
T1 - Experimental studies towards long pulse steady state operation in LHD
JF - Nuclear Fusion
Y1 - 2001
A1 - Noda, N.
A1 - Nakamura, Y.
A1 - Takeiri, Y.
A1 - Mutoh, T.
A1 - Kumazawa, R.
A1 - Sato, M.
A1 - Kawahata, K.
A1 - Yamada, S.
A1 - Shimozuma, T.
A1 - Oka, Y.
A1 - Iiyoshi, A.
A1 - Sakamoto, R.
A1 - Kubota, Y.
A1 - Masuzaki, S.
A1 - Inagaki, S.
A1 - Morisaki, T.
A1 - Suzuki, H.
A1 - Ohyabu, N.
A1 - Adachi, K.
A1 - Akaishi, K.
A1 - Ashikawa, N.
A1 - Chikaraishi, H.
A1 - de Vries, P. C.
A1 - Emoto, M.
A1 - Funaba, H.
A1 - Goto, M.
A1 - Hamaguchi, S.
A1 - Ida, K.
A1 - Idei, H.
A1 - Ikeda, K.
A1 - Imagawa, S.
A1 - Inoue, N.
A1 - Isobe, M.
A1 - Iwamoto, A.
A1 - Kado, S.
A1 - Kaneko, O.
A1 - Kitagawa, S.
A1 - Khlopenkov, K.
A1 - Kobuchi, T.
A1 - Komori, A.
A1 - Kubo, S.
A1 - Liang, Y.
A1 - Maekawa, R.
A1 - Minami, T.
A1 - Mito, T.
A1 - Miyazawa, J.
A1 - Morita, S.
A1 - Murai, K.
A1 - Murakami, S.
A1 - Muto, S.
A1 - Nagayama, Y.
A1 - Nakanishi, H.
A1 - Narihara, K.
A1 - Nishimura, A.
A1 - Nishimura, K.
A1 - Nishizawa, A.
A1 - Notake, T.
A1 - Ohdachi, S.
A1 - Okamoto, M.
A1 - Osakabe, M.
A1 - Ozaki, T.
A1 - Pavlichenko, R. O.
A1 - Peterson, B. J.
A1 - Sagara, A.
A1 - Saito, K.
A1 - Sakakibara, S.
A1 - Sasao, H.
A1 - Sasao, M.
A1 - Sato, K.
A1 - Seki, T.
A1 - Shoji, M.
A1 - Sugama, H.
A1 - Takahata, K.
A1 - Takechi, M.
A1 - Tamura, H.
A1 - Tamura, N.
A1 - Tanaka, K.
A1 - Toi, K.
A1 - Tokuzawa, T.
A1 - Torii, Y.
A1 - Tsumori, K.
A1 - Watanabe, K. Y.
A1 - Watanabe, T.
A1 - Watari, T.
A1 - Yanagi, N.
A1 - Yamada, I.
A1 - Yamada, H.
A1 - Yamaguchi, S.
A1 - Yamamoto, S.
A1 - Yamamoto, T.
A1 - Yokoyama, M.
A1 - Yoshimura, Y.
A1 - Ohtake, I.
A1 - Akiyama, R.
A1 - Haba, K.
A1 - Iima, M.
A1 - Kodaira, J.
A1 - Tsuzuki, K.
A1 - Itoh, K.
A1 - Matsuoka, K.
A1 - Ohkubo, K.
A1 - Satoh, S.
A1 - Satow, T.
A1 - Sudo, S.
A1 - Tanahashi, S.
A1 - Yamazaki, K.
A1 - Motojima, O.
A1 - Hamada, Y.
A1 - Fujiwara, M.
AB - In the Large Helical Device, stable discharges lasting longer than one minute have been obtained using the complete heating scheme, including ECH. The plasma is sustained with NBI or ICRF of 0.5-1 MW. The central plasma temperature is higher than 1.5 keV with a density of (1-2) x 10(19) m(-3) maintained until the end of the pulse. Full installation of the carbon divertor has contributed to this achievement. This provides a sufficient basis for physics and technology studies for the next campaign. Long pulse operation opens new possibilities in diagnostics and in physics studies. Higher accuracy and reliability are obtained with a diagnostics parameter scan, longer integration of signals or two dimensional measurement. The mechanism of a slow oscillation called 'breathing' is discussed. Hydrogen recycling analysis has been carried out and preliminary results have been obtained. On the basis of these results, the future programme is divided into two categories: (i) physics and technology experiments utilizing long pulse discharges lasting up to 5 minutes, and (ii) extension of the pulse length up to one hour.
VL - 41
SN - 0029-5515; 1741-4326
U5 - 3347e2694d4225255b5acce27fce657c
ER -
TY - JOUR
T1 - Plasma diagnostics for INTER-FEAT
JF - Review of Scientific Instruments
Y1 - 2001
A1 - Ebisawa, K.
A1 - Costley, A. E.
A1 - Donne, A. J. H.
A1 - Janeschitz, G.
A1 - Kasai, S.
A1 - Malaquias, A.
A1 - Vayakis, G.
A1 - Walker, C. I.
A1 - Yamamoto, S.
A1 - Zaveriaev, V.
AB - A comprehensive set of diagnostics is planned for ITER-FEAT. The design of the systems is a substantial technical challenge because of the combination of the harsh environment with the demanding measurement requirements. Through a combination of careful choice of technique, materials, and design, supported by dedicated research and development, an extensive diagnostic set has been developed. The designs are based on existing techniques as much as possible but in some cases novel approaches have to be adopted. In the article the requirements for measurements are outlined and representative diagnostic designs are presented. Key issues in the design are identified and areas requiring further development are highlighted. (C) 2001 American Institute of Physics.
VL - 72
SN - 0034-6748
U5 - 48e59935beb594b9bf3ee9f247e930e1
ER -