Fast Tangentially Viewed Soft X-Ray Imaging System Based on Image Intensifier with Microchannel Plate Detector on QUEST

Canbin Huang; Kazuaki Hanada; Kengoh Kuroda; Shinichro Kojima; Hiroaki Fujiyoshi; Hiroki Miura; Tomoki Yamada; Hiroshi Idei; Makoto Hasegawa; Takumi Onchi

doi:10.1585/pfr.14.1402128

Fast Tangentially Viewed Soft X-Ray Imaging System Based on Image Intensifier with Microchannel Plate Detector on QUEST

Canbin Huang, Kazuaki Hanada, Kengoh Kuroda, Shinichro Kojima, Hiroaki Fujiyoshi, Hiroki Miura, Tomoki Yamada, Hiroshi Idei, Makoto Hasegawa, Takumi Onchi

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

A two-dimensional (2D) soft X-ray (SXR) imaging system for obtaining tangential views of plasmaproduced SXR has been installed on the QUEST tokamak. The system comprises a chevron micro-channel plate (MCP) and a phosphor screen, which together serve as an SXR detector and image intensifier, along with a high-speed video camera for capturing and storing image data. The system can be used in imaging mode to obtain high spatial- and time-resolution images or in photon counting mode at an ultra-high framing rate of 100 kHz to obtain SXR energy spectra. Here, we propose a method of in situ energy calibration based on the transmission characteristics of a 25-μm Be filter. The proposed method was used to obtain SXR spectra in the energy range 1.5 - 3.5 keV with a core electron temperature in agreement with electron temperatures measured by the Thomson scattering method. Furthermore, oscillations based on the modification of plasma parameters and rapid increases in impurity radiation were detected in imaging mode. This dual-mode-compatible method for obtaining 2D SXR diagnostics is useful for the study of high temperature plasmas.

Original language	English
Pages (from-to)	1402128-1-1402128-8
Journal	Plasma and Fusion Research
Volume	14
DOIs	https://doi.org/10.1585/pfr.14.1402128
Publication status	Published - 2019

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

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10.1585/pfr.14.1402128

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@article{b486a9f9d18e4ac585d45ead21c10a04,

title = "Fast Tangentially Viewed Soft X-Ray Imaging System Based on Image Intensifier with Microchannel Plate Detector on QUEST",

abstract = "A two-dimensional (2D) soft X-ray (SXR) imaging system for obtaining tangential views of plasmaproduced SXR has been installed on the QUEST tokamak. The system comprises a chevron micro-channel plate (MCP) and a phosphor screen, which together serve as an SXR detector and image intensifier, along with a high-speed video camera for capturing and storing image data. The system can be used in imaging mode to obtain high spatial- and time-resolution images or in photon counting mode at an ultra-high framing rate of 100 kHz to obtain SXR energy spectra. Here, we propose a method of in situ energy calibration based on the transmission characteristics of a 25-μm Be filter. The proposed method was used to obtain SXR spectra in the energy range 1.5 - 3.5 keV with a core electron temperature in agreement with electron temperatures measured by the Thomson scattering method. Furthermore, oscillations based on the modification of plasma parameters and rapid increases in impurity radiation were detected in imaging mode. This dual-mode-compatible method for obtaining 2D SXR diagnostics is useful for the study of high temperature plasmas.",

author = "Canbin Huang and Kazuaki Hanada and Kengoh Kuroda and Shinichro Kojima and Hiroaki Fujiyoshi and Hiroki Miura and Tomoki Yamada and Hiroshi Idei and Makoto Hasegawa and Takumi Onchi",

note = "Publisher Copyright: {\textcopyright} 2019 The Japan Society of Plasma Science and Nuclear Fusion Research",

year = "2019",

doi = "10.1585/pfr.14.1402128",

language = "English",

volume = "14",

pages = "1402128--1--1402128--8",

journal = "Plasma and Fusion Research",

issn = "1880-6821",

publisher = "The Japan Society of Plasma Science and Nuclear Fusion Research (JSPF)",

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T1 - Fast Tangentially Viewed Soft X-Ray Imaging System Based on Image Intensifier with Microchannel Plate Detector on QUEST

AU - Huang, Canbin

AU - Hanada, Kazuaki

AU - Kuroda, Kengoh

AU - Kojima, Shinichro

AU - Fujiyoshi, Hiroaki

AU - Miura, Hiroki

AU - Yamada, Tomoki

AU - Idei, Hiroshi

AU - Hasegawa, Makoto

AU - Onchi, Takumi

PY - 2019

Y1 - 2019

N2 - A two-dimensional (2D) soft X-ray (SXR) imaging system for obtaining tangential views of plasmaproduced SXR has been installed on the QUEST tokamak. The system comprises a chevron micro-channel plate (MCP) and a phosphor screen, which together serve as an SXR detector and image intensifier, along with a high-speed video camera for capturing and storing image data. The system can be used in imaging mode to obtain high spatial- and time-resolution images or in photon counting mode at an ultra-high framing rate of 100 kHz to obtain SXR energy spectra. Here, we propose a method of in situ energy calibration based on the transmission characteristics of a 25-μm Be filter. The proposed method was used to obtain SXR spectra in the energy range 1.5 - 3.5 keV with a core electron temperature in agreement with electron temperatures measured by the Thomson scattering method. Furthermore, oscillations based on the modification of plasma parameters and rapid increases in impurity radiation were detected in imaging mode. This dual-mode-compatible method for obtaining 2D SXR diagnostics is useful for the study of high temperature plasmas.

AB - A two-dimensional (2D) soft X-ray (SXR) imaging system for obtaining tangential views of plasmaproduced SXR has been installed on the QUEST tokamak. The system comprises a chevron micro-channel plate (MCP) and a phosphor screen, which together serve as an SXR detector and image intensifier, along with a high-speed video camera for capturing and storing image data. The system can be used in imaging mode to obtain high spatial- and time-resolution images or in photon counting mode at an ultra-high framing rate of 100 kHz to obtain SXR energy spectra. Here, we propose a method of in situ energy calibration based on the transmission characteristics of a 25-μm Be filter. The proposed method was used to obtain SXR spectra in the energy range 1.5 - 3.5 keV with a core electron temperature in agreement with electron temperatures measured by the Thomson scattering method. Furthermore, oscillations based on the modification of plasma parameters and rapid increases in impurity radiation were detected in imaging mode. This dual-mode-compatible method for obtaining 2D SXR diagnostics is useful for the study of high temperature plasmas.

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Fast Tangentially Viewed Soft X-Ray Imaging System Based on Image Intensifier with Microchannel Plate Detector on QUEST

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