Title :
Unique diagnostic developments with tracer-encapsulated pellet injection
Author :
Sudo, Shunsuke ; Tamura, Naoki ; Kalinina, D. ; Goncharov, P. ; Sergeev, Vladimir ; Sato, Kiminori ; Muto, Salvatore ; Inagaki, Shun ; Kato, Shigeo
Author_Institution :
Nat. Inst. for Fusion Sci., Toki, Japan
Abstract :
Summary form only given, as follows. Unique diagnostic method has been developed with using tracer-encapsulated pellet (TESPEL) injection. TESPEL; consists of polystyrene as an outer shell and of specific material as a tracer. The amount of the trace varies from on ball with diameter of 100 /spl mu/m to 8 balls with the same diameter each. The special features of TESPEL injection into the plasma are(a) local deposition inside the plasma, (b) the deposited amount of the tracer in the plasma can be known precisely, (c) relatively wide selection of tracer material is possible. The achievements of TESPEL experiments on LHD are: impurity transport properties such as diffusion coefficient inward pinch velocity were obtained for the various conditions of the plasma.
Keywords :
plasma diagnostics; plasma impurities; plasma transport processes; stellarators; tracers; LHD; absolute intensity; cold pulse propagation; diffusion coefficient; heat diffusivity; high energy particle; impurity transport properties; inward pinch velocity; local deposition; magnetic island region; plasma diagnostic method; polystyrene outer shell; spectroscopic light; tracer-encapsulated pellet injection; Fluctuations; Instruments; Laboratories; Optical imaging; Optical scattering; Plasma density; Plasma materials processing; Plasma measurements; Plasma properties; Springs;
Conference_Titel :
Plasma Science, 2003. ICOPS 2003. IEEE Conference Record - Abstracts. The 30th International Conference on
Conference_Location :
Jeju, South Korea
Print_ISBN :
0-7803-7911-X
DOI :
10.1109/PLASMA.2003.1230096
