Session KP01 - Poster Session III.
POSTER session, Tuesday afternoon, March 23
Exhibit Hall, GWCC
In order to promote particle transport studies, the concept of a tracer-encapsulated cryogenic pellet : TECPEL has been proposed. The concept is based upon the production of a both poloidally and toroidally localized particle source as tracers. After this, a tracer-encapsulated solid pellet : TESPEL is proposed. While TECPEL consists of a hydrogen isotope as an outer part and low Z material as an inner core, TESPEL consists of polystyrene as an outer part and LiH as an inner core. Therefore, TESPEL can be handled at room temperature. For proving the concept of the new diagnostics, TESPEL is injected into a neutral-beam-heated plasma of the Compact Helical System. The results from CHS have shown the successful local deposition of the tracer, and the behavior of tracer particles deposited locally in the plasma core region is also observed by a method of charge exchange recombination spectroscopy. Therefore, our new diagnostic concept has been proven for the first time from the viewpoints of both the production method of TESPEL and the observation of the tracer particle behavior.