SlimCS - Compact low aspect ratio DEMO reactor with reduced-size central solenoid

K. Tobita, S. Nishio, M. Sato, S. Sakurai, T. Hayashi, Y. K. Shibama, T. Isono, M. Enoeda, H. Nakamura, S. Sato, K. Ezato, T. Hayashi, T. Hirose, S. Ide, T. Inoue, Y. Kamada, Y. Kawamura, H. Kawashima, N. Koizumi, G. KuritaY. Nakamura, K. Mouri, T. Nishitani, J. Ohmori, N. Oyama, K. Sakamoto, S. Suzuki, T. Suzuki, H. Tanigawa, K. Tsuchiya, D. Tsuru

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68 Citations (Scopus)


The concept for a compact DEMO reactor named 'SlimCS' is presented. Distinctive features of the concept are low aspect ratio (A ≤ 2.6) and use of a reduced-size centre solenoid (CS) which has the function of plasma shaping rather than poloidal flux supply. The reduced-size CS enables us to introduce a thin toroidal field coil system which contributes to reducing the weight and perhaps lessening the construction cost. Low-A has merits of vertical stability for high elongation (κ) and high normalized beta (βN), which leads to a high power density with reasonable physics requirements. This is because high κ facilitates high nGW (because of an increase in Ip), which allows efficient use of the capacity of high βN. From an engineering aspect, low-A may ensure ease in designing blanket modules robust to electromagnetic forces acting on disruptions. Thus, a superconducting low-A tokamak reactor such as SlimCS can be a promising DEMO concept with physics and engineering advantages.

Original languageEnglish
Article number022
Pages (from-to)892-899
Number of pages8
JournalNuclear Fusion
Issue number8
Publication statusPublished - 2007 Aug 1
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Condensed Matter Physics


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