Overview of large helical device diagnostics (invited)

S. Sudo, Y. Nagayama, M. Emoto, M. Goto, Y. Hamada, K. Ida, T. Ido, H. Iguchi, S. Inagaki, M. Isobe, K. Kawahata, K. Khlopenkov, S. Masuzaki, T. Minami, S. Morita, S. Muto, H. Nakanishi, K. Narihara, A. Nishizawa, S. OhdachiM. Osakabe, T. Ozaki, B.J. Peterson, S. Sakakibara, M. Sasao, K. Sato, M. Shoji, K. Tanaka, K. Toi, T. Tokuzawa, K. Watanabe, T. Watanabe, I. Yamada, N. Ashikawa, T. Kobuchi, Y. Liang, N. Tamura, H. Sasao, A. Ejiri, S. Okajima, A. Mase, S. Tsuji-lio, T. Akiyama, V. Zanza, G. Bracco, A. Sibio, B. Tilia, A.V. Krasilnikov, J.F. Lyon, L.N. Vyacheslavov, G.A. Wurden

Research output: Contribution to journalReview article

12 Citations (Scopus)


The Large Helical Device (LHD) is the largest helical machine with superconducting coils. Key diagnostics issues for LHD are: (a) capability for multidimensional measurements because of the nonaxisymmetric toroidal plasma; (b) measurements of the electric field; (c) cross check of fundamental parameters using different methods; (d) advanced measurements appropriate for steady-state operation; and (e) a satisfactory data acquisition system. The design and research and development of plasma diagnostics were carried out taking these issues into consideration. As a result, the present status of diagnostics is described: diagnostics for LHD operation, fundamental diagnostics for plasma performance, diagnostics for physics subjects, innovative diagnostics and diagnostics for long-pulse operation. The LHD experiment started in March, 1998. Since then, the development of diagnostics has kept pace with the experimental campaigns. © 2001 American Institute of Physics.
Original languageEnglish
Pages (from-to)483 - 491
Number of pages9
JournalReview of Scientific Instruments
Issue number1 II
Publication statusPublished - Jan 2001
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Instrumentation

Cite this

Sudo, S., Nagayama, Y., Emoto, M., Goto, M., Hamada, Y., Ida, K., ... Wurden, G. A. (2001). Overview of large helical device diagnostics (invited). Review of Scientific Instruments, 72(1 II), 483 - 491. https://doi.org/10.1063/1.1310581