Iron Kα measurement of LHD plasmas using a wide band and compact x-ray crystal spectrometer

I. Sakurai, Y. Tawara, C. Matsumoto, A. Furuzawa, S. Morita, M. Goto

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

X-ray spectra of Fe Kα transitions have been obtained on the Large Helical Device (LHD) using a wide band and compact x-ray spectrometer. The spectrometer consists of a Johann-type LiF(220) crystal with a curvature of 430 mm and a back-illuminated charge-coupled device (CCD) detector with a size of 26.6×6.7 mm2. A wide energy range of 6.4-7.0 keV can be observed with high brightness and high temporal resolution, which enables us the measurement of Kα transitions from all charge states of Fe ions. An energy resolution of the spectrometer was 10 eV at full width at half maximum. Time-developed Kα spectra after injection of Fe-coated impurity pellet were also measured with a time interval of 10 ms in the full binning mode of CCD in order to analyze the impurity transport at the central column of LHD plasmas. The system can be modified to have better time response up to 1 ms to analyze the ionization and recombination processes after the pellet injection.

Original languageEnglish
Article number10F328
JournalReview of Scientific Instruments
Volume77
Issue number10
DOIs
Publication statusPublished - 08-11-2006

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Plasma devices
pellets
Spectrometers
charge coupled devices
spectrometers
injection
Iron
broadband
x ray spectrometers
Charge coupled devices
iron
X rays
impurities
Crystals
time response
temporal resolution
Impurities
crystals
brightness
x rays

All Science Journal Classification (ASJC) codes

  • Instrumentation

Cite this

Sakurai, I. ; Tawara, Y. ; Matsumoto, C. ; Furuzawa, A. ; Morita, S. ; Goto, M. / Iron Kα measurement of LHD plasmas using a wide band and compact x-ray crystal spectrometer. In: Review of Scientific Instruments. 2006 ; Vol. 77, No. 10.
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Iron Kα measurement of LHD plasmas using a wide band and compact x-ray crystal spectrometer. / Sakurai, I.; Tawara, Y.; Matsumoto, C.; Furuzawa, A.; Morita, S.; Goto, M.

In: Review of Scientific Instruments, Vol. 77, No. 10, 10F328, 08.11.2006.

Research output: Contribution to journalArticle

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T1 - Iron Kα measurement of LHD plasmas using a wide band and compact x-ray crystal spectrometer

AU - Sakurai, I.

AU - Tawara, Y.

AU - Matsumoto, C.

AU - Furuzawa, A.

AU - Morita, S.

AU - Goto, M.

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