High efficiency extreme ultraviolet overview spectrometer: Construction and laboratory testing

Biel, W.; Greiche, Albert; Burhenn, R.; Jourdain, E.; Lepere, D.

doi:10.1063/1.2221659

Cited by 18 publications

(15 citation statements)

References 12 publications

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“…The supersonic helium beam [8] was deployed to investigate electron density and temperature in the vicinity of the last closed flux surface (LCFS). Impurity content in the core plasmas was investigated with the ultra-high resolution vacuum ultra-violet (VUV) spectrometer HEXOS [9]. Electron-cyclotron emission (ECE) diagnostic [10] was used to monitor the electron temperature in the core plasma.…”

Section: Experimental Planmentioning

confidence: 99%

Dust investigations in TEXTOR: Impact of dust on plasma–wall interactions and on plasma performance

Litnovsky

Rudakov

Bozhenkov

et al. 2013

Journal of Nuclear Materials

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Dust will have severe impact on ITER performance since the accumulation of tritium in dust represents a safety issue, a possible reaction of dust with air and steam imposes an explosion 2 hazard and the penetration of dust in core plasmas may degrade plasma performance by increasing radiative losses. Investigations were performed in TEXTOR where known amounts of pre-characterized carbon, diamond and tungsten dust were mobilized into plasmas using special dust holders.Mobilization of dust changed a balance between plasma-surface interactions processes, significantly increasing net deposition. Immediately after launch dust was dominating both core and edge plasma parameters. Remarkably, in about 100 milliseconds after the launch, the effect of dust on edge and core plasma parameters was vanished: no increase of carbon and tungsten concentrations in the core plasmas was detected suggesting a prompt transport of dust to the nearby plasma-facing components without further residence in the plasma. PSI 2012

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Section: Experimental Planmentioning

confidence: 99%

Dust investigations in TEXTOR: Impact of dust on plasma–wall interactions and on plasma performance

Litnovsky

Rudakov

Bozhenkov

et al. 2013

Journal of Nuclear Materials

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“…To achieve this aim, the VUV core survey spectrometer was designed as a five-channel spectral system. [3][4][5] To investigate the optimal design of multi-channel spectrometer, a twochannel prototype spectrometer has been developed with No. 3 (14.4-31.8 nm) and No.…”

Section: Introductionmentioning

confidence: 99%

Test of prototype ITER vacuum ultraviolet spectrometer and its application to impurity study in KSTAR plasmas

Seon

Hong

Jang

et al. 2014

Review of Scientific Instruments

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Articles you may be interested inEdge impurity rotation profile measurement by using high-resolution ultraviolet/visible spectrometer on J-TEXTa) Rev. Sci. Instrum. 85, 11E423 (2014) To optimize the design of ITER vacuum ultraviolet (VUV) spectrometer, a prototype VUV spectrometer was developed. The sensitivity calibration curve of the spectrometer was calculated from the mirror reflectivity, the grating efficiency, and the detector efficiency. The calibration curve was consistent with the calibration points derived in the experiment using the calibrated hollow cathode lamp. For the application of the prototype ITER VUV spectrometer, the prototype spectrometer was installed at KSTAR, and various impurity emission lines could be measured. By analyzing about 100 shots, strong positive correlation between the O VI and the C IV emission intensities could be found.

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“…Wide range crystal spectrometers at the equatorial and upper ports will measure impurity emission in the 0.05 -10 nm range. New developments in curved crystals and 2D detectors are emerging that will enable tomographic reconstruction with improved spectral resolution [11,12,13]. A high resolution X-ray spectrometer will be used to determine ion temperature from Doppler broadening.…”

Section: Iter Spectroscopic Diagnosticsmentioning

confidence: 99%

Atomic physics in the quest for fusion energy and ITER

Skinner

2009

Phys. Scr.

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The urgent quest for new energy sources has led developed countries, representing over half of the world population, to collaborate on demonstrating the scientific and technological feasibility of magnetic fusion through the construction and operation of ITER. Data on high-Z ions will be important in this quest. Tungsten plasma facing components have the necessary low erosion rates and low tritium retention but the high radiative efficiency of tungsten ions leads to stringent restrictions on the concentration of tungsten ions in the burning plasma. The influx of tungsten to the burning plasma will need to be diagnosed, understood and stringently controlled. Expanded knowledge of the atomic physics of neutral and ionized tungsten will be important to monitor impurity influxes and derive tungsten concentrations. Also, inert gases such as argon and xenon will be used to dissipate the heat flux flowing to the divertor. This article will summarize the spectroscopic diagnostics planned for ITER and outline areas where additional data is needed.

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High efficiency extreme ultraviolet overview spectrometer: Construction and laboratory testing

Cited by 18 publications

References 12 publications

Dust investigations in TEXTOR: Impact of dust on plasma–wall interactions and on plasma performance

Dust investigations in TEXTOR: Impact of dust on plasma–wall interactions and on plasma performance

Test of prototype ITER vacuum ultraviolet spectrometer and its application to impurity study in KSTAR plasmas

Atomic physics in the quest for fusion energy and ITER

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