Conceptual design of imaging bolometer for use of computed tomography in JT-60SA

Ryuichi Sano, Kiyofumi Mukai, Byron J. Peterson, Masakatsu Fukumoto, Kazuo Hoshino

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

An InfraRed imaging Video Bolometer (IRVB) system in JT-60SA has been designed for the two-dimensional (2D) Computed Tomography (CT) analysis of radiation. To achieve complete viewing of the whole poloidal cross section for plasmas having a low aspect ratio, a new IRVB concept, which has two sets of pin-hole camera systems viewing two different directions, has been introduced. Fields of view of the IRVB have been successfully designed by moving apertures to be sufficient for CT use without installation in tangential ports. The size of the aperture, which determines the width of the sightline of the IRVB channels, has also been optimized with respect to the reconstruction error with well-established solvers of tomography. The optimization indicates that the 7 mm square aperture is the best for this system, and the CT measurement without this optimization can become degraded. A synthetic image using an estimated radiation profile shows that the signal to noise (S/N) ratio of the designed IRVB is large enough to identify the incident radiation power. The result indicates that the designed IRVB can be used for the 2D CT measurement of radiation in JT-60SA.

Original languageEnglish
Article number053506
JournalReview of Scientific Instruments
Volume88
Issue number5
DOIs
Publication statusPublished - 2017 May 1
Externally publishedYes

Fingerprint

Bolometers
Infrared imaging
bolometers
Conceptual design
Tomography
tomography
Imaging techniques
Radiation
apertures
radiation
Pinhole cameras
pinhole cameras
low aspect ratio
optimization
incident radiation
installing
field of view
Aspect ratio
Signal to noise ratio
signal to noise ratios

ASJC Scopus subject areas

  • Instrumentation

Cite this

Conceptual design of imaging bolometer for use of computed tomography in JT-60SA. / Sano, Ryuichi; Mukai, Kiyofumi; Peterson, Byron J.; Fukumoto, Masakatsu; Hoshino, Kazuo.

In: Review of Scientific Instruments, Vol. 88, No. 5, 053506, 01.05.2017.

Research output: Contribution to journalArticle

Sano, Ryuichi ; Mukai, Kiyofumi ; Peterson, Byron J. ; Fukumoto, Masakatsu ; Hoshino, Kazuo. / Conceptual design of imaging bolometer for use of computed tomography in JT-60SA. In: Review of Scientific Instruments. 2017 ; Vol. 88, No. 5.
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