Design and initial result of time-resolved vertical soft x-ray imaging system in low-A RFP

Akio Sanpei; Kensuke Oki; Daisuke Fukahori; Kazuaki Deguchi; Seiya Nakaki; Kanae Nishimura; Haruhiko Himura; Sadao Masamune; Satoshi Ohdachi; Nobuhiro Nishino; Takumi Onchi

doi:10.1585/pfr.7.2402052

Design and initial result of time-resolved vertical soft x-ray imaging system in low-A RFP

Akio Sanpei, Kensuke Oki, Daisuke Fukahori, Kazuaki Deguchi, Seiya Nakaki, Kanae Nishimura, Haruhiko Himura, Sadao Masamune, Satoshi Ohdachi, Nobuhiro Nishino, Takumi Onchi

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

3 Citations (Scopus)

Abstract

A time-resolved vertical soft X-ray (SXR) imaging system was constructed. To identify the structure of the magnetic island using the obtained SXR images, we calculated the two-dimensional (2-D) image expected from low-aspect-ratio (low-A) reversed field pinch (RFP) plasmas. The 2-D image was found to reflect the change in the radiation power caused by the magnetic island. A preliminary experimental result in which we observed vertical SXR images fromthe quasi-periodic quasi-single helicity (QSH) state in low-A RFP plasmas is presented. We successfully obtained the time evolution of SXR images from the vertical port. By comparing the observed images with simulated images, we found that the evolution of the experimental SXR image suggests a rotating helical configuration.

Original language	English
Article number	2402052
Journal	Plasma and Fusion Research
Volume	7
Issue number	SPL.ISS.1
DOIs	https://doi.org/10.1585/pfr.7.2402052
Publication status	Published - 2012
Externally published	Yes

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

Access to Document

10.1585/pfr.7.2402052

Cite this

@article{2ae10cb0d36346b59e6a142cabfbcd06,

title = "Design and initial result of time-resolved vertical soft x-ray imaging system in low-A RFP",

abstract = "A time-resolved vertical soft X-ray (SXR) imaging system was constructed. To identify the structure of the magnetic island using the obtained SXR images, we calculated the two-dimensional (2-D) image expected from low-aspect-ratio (low-A) reversed field pinch (RFP) plasmas. The 2-D image was found to reflect the change in the radiation power caused by the magnetic island. A preliminary experimental result in which we observed vertical SXR images fromthe quasi-periodic quasi-single helicity (QSH) state in low-A RFP plasmas is presented. We successfully obtained the time evolution of SXR images from the vertical port. By comparing the observed images with simulated images, we found that the evolution of the experimental SXR image suggests a rotating helical configuration.",

author = "Akio Sanpei and Kensuke Oki and Daisuke Fukahori and Kazuaki Deguchi and Seiya Nakaki and Kanae Nishimura and Haruhiko Himura and Sadao Masamune and Satoshi Ohdachi and Nobuhiro Nishino and Takumi Onchi",

year = "2012",

doi = "10.1585/pfr.7.2402052",

language = "English",

volume = "7",

journal = "Plasma and Fusion Research",

issn = "1880-6821",

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

number = "SPL.ISS.1",

}

TY - JOUR

T1 - Design and initial result of time-resolved vertical soft x-ray imaging system in low-A RFP

AU - Sanpei, Akio

AU - Oki, Kensuke

AU - Fukahori, Daisuke

AU - Deguchi, Kazuaki

AU - Nakaki, Seiya

AU - Nishimura, Kanae

AU - Himura, Haruhiko

AU - Masamune, Sadao

AU - Ohdachi, Satoshi

AU - Nishino, Nobuhiro

AU - Onchi, Takumi

PY - 2012

Y1 - 2012

N2 - A time-resolved vertical soft X-ray (SXR) imaging system was constructed. To identify the structure of the magnetic island using the obtained SXR images, we calculated the two-dimensional (2-D) image expected from low-aspect-ratio (low-A) reversed field pinch (RFP) plasmas. The 2-D image was found to reflect the change in the radiation power caused by the magnetic island. A preliminary experimental result in which we observed vertical SXR images fromthe quasi-periodic quasi-single helicity (QSH) state in low-A RFP plasmas is presented. We successfully obtained the time evolution of SXR images from the vertical port. By comparing the observed images with simulated images, we found that the evolution of the experimental SXR image suggests a rotating helical configuration.

AB - A time-resolved vertical soft X-ray (SXR) imaging system was constructed. To identify the structure of the magnetic island using the obtained SXR images, we calculated the two-dimensional (2-D) image expected from low-aspect-ratio (low-A) reversed field pinch (RFP) plasmas. The 2-D image was found to reflect the change in the radiation power caused by the magnetic island. A preliminary experimental result in which we observed vertical SXR images fromthe quasi-periodic quasi-single helicity (QSH) state in low-A RFP plasmas is presented. We successfully obtained the time evolution of SXR images from the vertical port. By comparing the observed images with simulated images, we found that the evolution of the experimental SXR image suggests a rotating helical configuration.

UR - http://www.scopus.com/inward/record.url?scp=84870221527&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84870221527&partnerID=8YFLogxK

U2 - 10.1585/pfr.7.2402052

DO - 10.1585/pfr.7.2402052

M3 - Article

AN - SCOPUS:84870221527

SN - 1880-6821

VL - 7

JO - Plasma and Fusion Research

JF - Plasma and Fusion Research

IS - SPL.ISS.1

M1 - 2402052

ER -

Design and initial result of time-resolved vertical soft x-ray imaging system in low-A RFP

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this