Inversion of infrared imaging bolometer based on one-dimensional and three-dimensional modeling in HL-2A

Journal Article · Tue Apr 15 00:00:00 EDT 2014 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4870408· OSTI ID:22254949

Liu, Y.; Li, W.; Cui, Z. Y.; Dong, Y. B.; Lu, J.; Xia, Z. W.; Yi, P.; Yang, Q. W. ^[1]

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1. Southwestern Institute of Physics, Chengdu 610041 (China)

Linear regularization has been applied to the HL-2A infrared imaging bolometer to reconstruct local plasma emission with one-dimensional (1D) and three-dimensional (3D) modeling under the assumption of toroidal symmetry. In the 3D modeling, a new method to calculate the detector point response function is introduced. This method can be adapted to an arbitrarily shaped pinhole. With the full 3D treatment of the detector geometry, up to 50% of the mean-squared error is reduced compared with the 1D modeling. This is attributed to the effects of finite detector size being taken into account in the 3D modeling. Meanwhile, the number of the bolometer pixels has been optimized to 20 × 20 by making a trade-off between the number of bolometer pixels and the sensitivity of the system. The plasma radiated power density distributions have been calculated as a demonstration using 1D modeling and 3D modeling, respectively.

• OSTI ID: 22254949
• Journal Information: Review of Scientific Instruments, Vol. 85, Issue 4; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
BOLOMETERS
ERRORS
GEOMETRY
PLASMA
POWER DENSITY
RESPONSE FUNCTIONS
SENSITIVITY
SIMULATION
SYMMETRY