Author/Authors :
Bhattacharyay، نويسنده , , R. and Zushi، نويسنده , , H. and Nakashima، نويسنده , , K. and Shikama، نويسنده , , T. and Sakamoto، نويسنده , , M. and Ogawa، نويسنده , , M. and Nakamura، نويسنده , , K. and Yoshida، نويسنده , , N. and Kado، نويسنده , , S. and Sawada، نويسنده , , K. and Hirooka، نويسنده , , Y. and Hanada، نويسنده , , K. and Sato، نويسنده , , K.N. and Idei، نويسنده , , H. and Sasaki، نويسنده , , K. and Xu، نويسنده , , H. L. HASEGAWA، نويسنده , , M. and Uehara، نويسنده , , K. and Tsushima، نويسنده , , A. and Kimura، نويسنده , , N. and Nozaki، نويسنده , , Y. and Kawasaki، نويسنده , , S. and Nakashima، نويسنده , , H. and Higashijima، نويسنده , , A.، نويسنده ,
Abstract :
Tokamak operation has been performed under the localized plasma wall interaction conditions in TRIAM-1M, using a water cooled rail movable limiter (ML) made of Molybdenum. The limiter surface temperature dependence on hydrogen recycling and neutral molybdenum impurity production behaviour has been studied using visible as well as infrared spectroscopy during low power long pulse and high power short pulse discharges. In these experiments it is considered that escaped energetic electrons are lost mainly on ML and localised heat deposition makes a ‘hot spot’ on ML. It has been observed that H2, Hα and MoI intensities critically depend on the hot spot temperature (Thot) and enhanced recycling due to localized PWI on ML can fuel the discharge without any external fueling source.
