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Title: Optics design for J-TEXT ECE imaging with field curvature adjustment lens

Significant progress has been made in the imaging and visualization of magnetohydrodynamic and microturbulence phenomena in magnetic fusion plasmas. Of particular importance has been microwave electron cyclotron emission imaging (ECEI) for imaging T{sub e} fluctuations. Key to the success of ECEI is a large Gaussian optics system constituting a major portion of the focusing of the microwave radiation from the plasma to the detector array. Both the spatial resolution and observation range are dependent upon the imaging optics system performance. In particular, it is critical that the field curvature on the image plane is reduced to decrease crosstalk between vertical channels. The receiver optics systems for two ECEI on the J-TEXT device have been designed to ameliorate these problems and provide good performance with additional field curvature adjustment lenses with a meniscus shape to correct the aberrations from several spherical surfaces.
Authors:
; ; ;  [1] ; ; ; ; ; ;  [2] ;  [3] ; ;  [4]
  1. School of Physics, University of Science and Technology of China, Anhui 230026 (China)
  2. University of California at Davis, Davis, California 95616 (United States)
  3. Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States)
  4. College of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074 (China)
Publication Date:
OSTI Identifier:
22303700
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 11; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 43 PARTICLE ACCELERATORS; ELECTRON CYCLOTRON-RESONANCE; ELECTRON TEMPERATURE; FLUCTUATIONS; FOCUSING; IMAGES; MICROWAVE RADIATION; OPTICAL EQUIPMENT; OPTICS; PLASMA; SPATIAL RESOLUTION; SPHERICAL CONFIGURATION; TEXT DEVICES