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

fYear

2003

fDate

5-5 June 2003

Firstpage

482

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Plasma Science, 2003. ICOPS 2003. IEEE Conference Record - Abstracts. The 30th International Conference on

Conference_Location

Jeju, South Korea

ISSN

0730-9244

Print_ISBN

0-7803-7911-X

Type

conf

DOI

10.1109/PLASMA.2003.1230096

Filename

1230096