A combined Thomson–Rayleigh scattering diagnostic using an intensified photodiode array

Sanden, van de Mcm Richard; Janssen, GM Ger; Regt, de Jm Hans; Schram, DC Daan; Mullen, van der Jjam Joost; Sijde, van der B Bart

doi:10.1063/1.1142554

Cited by 115 publications

(99 citation statements)

References 25 publications

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“…The n +/s + ratio turns out to be of the right order of magnitude [compare the outcome of Eq. (5) to Fig. 9 13.…”

Section: A Thomson-rayleigh Scattering Resultsmentioning

confidence: 99%

“…The arc channel has a diameter of 4 mm. The are produces a thermal plasma at subatmospheric pressure, characterized by a relatively high heavy particle temperature (Tt, =T, =l eV) and high electron densities (10 -10 m Figure 2 shows the combined Thomson-Rayleigh diagnostic, which is described in detail elsewhere [5]. The Usually, every lateral scan consists of 80 measurements, covering a lateral range of 100 mm.…”

Section: Methodsmentioning

confidence: 99%

“…1, the experiment is sketched [5]. The cascaded arc plasma source consists of three cathodes, three electrically isolated copper plates, and an end anode plate.…”

Section: Methodsmentioning

confidence: 99%

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Argon-hydrogen plasma jet investigated by active and passive spectroscopic means

et al. 1994

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A supersonically expanding argon cascaded arc plasma, with difFerent amounts of hydrogen added (0, 0.7, and 1. 4 vol % H2), was studied using Thomson-Rayleigh scattering and optical emission spectroscopy. %'ith hydrogen added, the electron density profile as a function of the distance from the onset of the expansion shows a large extra ionization loss {compared to the pure argon case), especially after the stationary shock front. This anomalous loss of ionization is attributed to molecular processes, such as associative charge transfer between Ar+ and H2, and dissociative recombination of the resulting ArH+ molecular ion. Spatially resolved emission spectroscopy shows that in the expansion the radial hydrogen emission profiles are broader than the argon profiles. The addition of hydrogen appears to change the characteristic shock behavior of pure argon. For both the argon and the hydrogen system it is shown that the uppermost levels are in Saha equilibrium with their adjacent continuum.

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“…The n +/s + ratio turns out to be of the right order of magnitude [compare the outcome of Eq. (5) to Fig. 9 13.…”

Section: A Thomson-rayleigh Scattering Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Argon-hydrogen plasma jet investigated by active and passive spectroscopic means

et al. 1994

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“…[4] for an extended description of the device), currently under constructions at FOM Rijnhuizen, The Netherlands, will employ a high-pressure cascaded arc source [5]. A prototype of the source has successfully been tested at the Pilot-PSI machine [6], the forerunner of MAGNUM-PSI and proved the plasma parameters anticipated for MAGNUM-PSI and listed in Table 2.…”

Section: Magnum-psimentioning

confidence: 99%

New linear plasma devices in the trilateral euregio cluster for an integrated approach to plasma surface interactions in fusion reactors

Unterberg¹,

Jaspers

Koch³

et al. 2011

Fusion Engineering and Design

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a b s t r a c tNew linear plasma devices are currently being constructed or planned in the Trilateral Euregio Cluster (TEC) to meet the challenges with respect to plasma surface interactions in DEMO and ITER: i) MAGNUM-PSI (FOM), a high particle and power flux device with super-conducting magnetic field coils which will reach ITER-like divertor conditions at high magnetic field, ii) the newly proposed linear plasma device JULE-PSI (FZJ), which will allow to expose toxic and neutron activated target samples to ITER-like fluences and ion energies including in vacuo analysis of neutron activated samples, and iii) the plasmatron VISION I, a compact plasma device which will be operated inside the tritium lab at SCK-CEN Mol, capable to investigate tritium plasmas and moderately activated wall materials. This contribution shows the capabilities of the new devices and their forerunner experiments (Pilot-PSI at FOM and PSI-2 Jülich at FZJ) in view of the main objectives of the new TEC program on plasma surface interactions.

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“…a plasma with high density and low temperature with hydrogen/deuterium as a process gas. The choice was made to use a highpressure plasma source, the so-called cascaded arc source [15], which typically operates at pressures around 10 4 Pa, which is to be compared with the pressure of a few Pa in typical LaB 6 assisted arc discharges [3].…”

Section: Design Criteriamentioning

confidence: 99%

High heat flux capabilities of the Magnum-PSI linear plasma device

Temmerman

Berg

Scholten

et al. 2013

Fusion Engineering and Design

108

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Magnum-PSI is an advanced linear plasma device uniquely capable of producing plasma conditions similar to those expected in the divertor of ITER both steady-state and transients. The machine is designed both for fundamental studies of plasma-surface interactions under high heat and particle fluxes, and as a high-heat flux facility for the tests of plasma-facing components under realistic plasma conditions. To study the effects of transient heat loads on a plasma-facing surface, a novel pulsed plasma source system as well as a high power laser are available. In this article, we will describe the capabilities of Magnum-PSI for high-heat flux tests of plasma-facing materials.

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A combined Thomson–Rayleigh scattering diagnostic using an intensified photodiode array

Cited by 115 publications

References 25 publications

Argon-hydrogen plasma jet investigated by active and passive spectroscopic means

Argon-hydrogen plasma jet investigated by active and passive spectroscopic means

New linear plasma devices in the trilateral euregio cluster for an integrated approach to plasma surface interactions in fusion reactors

High heat flux capabilities of the Magnum-PSI linear plasma device

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