Conceptual design of the collection optics for the edge Thomson scattering system in ITER

Journal Article · Fri Oct 15 04:00:00 EDT 2010 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.3492424· OSTI ID:22058676

Yatsuka, E; Hatae, T; Kusama, Y ^[1]; Suitoh, S; Aida, Y ^[2]

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1. Japan Atomic Energy Agency, Naka, Ibaraki 311-0193 (Japan)
2. Showa Optronics Co., Ltd., Yokohama, Kanagawa 226-0006 (Japan)

Neutron and gamma-ray irradiation complicates the design of the edge Thomson scattering (TS) system in ITER. The TS light is relayed through the relaying optics with labyrinth and fiber coupling optics. Electron density of 2x10{sup 19} m{sup -3} is sufficient to measure T{sub e} and n{sub e} within a 10% and 5% margin of error, respectively, with a spatial resolution of 5 mm. This system can cover from 0.85 to 1 of the normalized minor radius. The time resolution is 10 ms, which is determined by the repetition rate of the laser device. A super-Gaussian is the ideal laser profile for the laser injection optics to avoid a breakdown of the filling gas used in density calibration through Raman scattering.

• OSTI ID: 22058676
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 10 Vol. 81; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BEAM INJECTION
CALIBRATION
DESIGN
ELECTRON DENSITY
ERRORS
FIBER OPTICS
GAMMA RADIATION
ITER TOKAMAK
LASERS
NEUTRONS
RAMAN EFFECT
SPATIAL RESOLUTION
THOMSON SCATTERING
TIME RESOLUTION
VISIBLE RADIATION