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Diagnostics of fast dust particles in tokamak edge plasmas

被引：42
作者：
Castaldo, C.
Ratynskaia, S.
Pericoli, V.
de Angelis, U.
Rypdal, K.
Pieroni, L.
Giovannozzi, E.
Maddaluno, G.
Marmolino, C.
Rufoloni, A.
Tuccillo, A.
Kretschmer, M.
Morfill, G. E.
机构：
[1] ENEA Euratom Fus Assoc, I-100044 Frascati, Italy
[2] Max Planck Inst Extraterr Phys, D-85741 Garching, Germany
[3] Royal Inst Technol, EE, SE-10044 Stockholm, Sweden
[4] Univ Naples Federico 2, Dept Phys Sci, I-80126 Naples, Italy
[5] Ist Nazl Fis Nucl, Sez Napoli, I-80126 Naples, Italy
[6] Univ Tromso, Dept Phys & Technol, N-9037 Tromso, Norway
[7] Univ Molise, Dept STAT, I-86090 Pesche, IS, Italy
来源：
NUCLEAR FUSION | 2007年 / 47卷 / 07期
关键词：
SCRAPE-OFF LAYER; CARBON DUST; TURBULENCE; TRANSPORT; ACCELERATOR; DYNAMICS;
D O I：
10.1088/0029-5515/47/7/L02
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
The use of electrostatic probes as a diagnostic tool of the dust particles in the tokamak edge plasmas is investigated. Probe measurements of electrostatic fluctuations in the scrape-off layer of the Frascati Tokamak Upgrade revealed that some features of the signals can be explained only by a local non-propagating phenomenon. These signal features are shown to be both in qualitative and quantitative agreement with ionization, and consequent extra charge collected by the probes, due to the impact of micrometre-sized dust at a velocity of the order of 10 km s(- 1). Electron microscope analysis of the probe surface yielded direct support for such an interpretation.
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收藏
页码：L5 / L9
页数：5
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