Optimal geometry for neutral‐beam‐based optical diagnostics in tokamaks
作者:
Joshua E. Goldston,
Robert J. Goldston,
期刊:
Review of Scientific Instruments
(AIP Available online 1995)
卷期:
Volume 66,
issue 12
页码: 5638-5639
ISSN:0034-6748
年代: 1995
DOI:10.1063/1.1146033
出版商: AIP
数据来源: AIP
摘要:
The key to obtaining good spatial resolution for neutral‐beam‐based optical diagnostics in tokamak plasmas is that the narrow optical sightline must cross the wide neutral beam path at a point where the sightline is tangent to the toroidal direction. For a single one‐dimensional pinhole camera arrangement, this condition can be met at two points of interest in the plasma, such as the magnetic axis and the plasma edge. The camera location required to provide optimized spatial resolution is calculated. We find that the camera must be placed closer to the plasma edge as the neutral beam is aimed more tangentially. ©1995 American Institute of Physics.
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