Measurement of the ion feature of collective Thomson scattering in collisionless plasmas

Olivares, I.; Kunze, H.‐J.

doi:10.1063/1.2207830

Cited by 4 publications

(3 citation statements)

References 6 publications

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“…3-5 shows clearly that the width of the ion feature spectra is dominated by the mass of the species of the plasma, demonstrating the ability to distinguish between different species in plasma mixtures. 21 The spectra show some fluctuations caused by the stray light fluctuations.…”

Section: à3mentioning

confidence: 99%

Collective Thomson scattering system for determination of ion properties in a high flux plasma beam

Meiden

Vernimmen

Bystrov

et al. 2016

Applied Physics Letters

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A collective Thomson scattering system has been developed for measuring ion temperature, plasma velocity and impurity concentration in the high density magnetized Magnum-PSI plasma beam, allowing for measurements at low temperature (<5 eV) and high electron density >4 × 1020 m−3, while avoiding laser plasma heating caused by inverse Bremsstrahlung. The collective Thomson scattering system is based on the fundamental mode of a seeded Nd:YAG laser and equipped with an LIVAR M506 camera (EBABS technology). The first collective Thomson scattering measurements are taken at the linear plasma generator Pilot-PSI, 40 mm downstream of the cascaded arc source. At this location, the ion temperature is about equal to the electron temperature in the bulk of the plasma beam.

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Section: à3mentioning

confidence: 99%

Collective Thomson scattering system for determination of ion properties in a high flux plasma beam

Meiden

Vernimmen

Bystrov

et al. 2016

Applied Physics Letters

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“…Comparison of Figs. 15, 16 and 17 shows clearly that the width of the ion feature spectra is dominated by the mass of the species of the plasma, which demonstrates the ability to distinguish between different species in plasma mixtures [18,24].…”

Section: Cts In Pilot-psimentioning

confidence: 99%

Incoherent and Collective Thomson Scattering for the Determination of Electron and Ion Properties in Low-Temperature Plasma

et al. 2020

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“…The ion feature is in principle ideal for the identification of impurities or to measure the evolution of test amounts of particles in time and space [9,21,22]; CTS on plasmas containing high mass particles results in high amplitude ion feature peaks, because the width of the spectrum is inversely proportional to the square root of the mass ratio of the ionized particle to be distinguished. However, for the low temperature plasmas (<6 eV) it is impossible to distinguish other masses due to the limited spectral resolving power of the spectrometer.…”

Section: Measurement Of Ionized Impuritiesmentioning

confidence: 99%

Collective Thomson scattering for ion temperature and velocity measurements on Magnum-PSI: a feasibility study

Meiden

2010

Plasma Phys. Control. Fusion

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In this paper, collective Thomson scattering (CTS) is proposed for measuring the ion temperature and axial/rotational velocity of a plasma jet in the linear plasma generator Magnum-PSI, where ITER-relevant plasma conditions will be simulated. CTS is feasible at Magnum-PSI, because high electron densities (n e ) can be obtained at low electron temperatures, which means that small Debye lengths are achievable. Calculations show that CTS is possible at the fundamental wavelength (1064 nm) of a Nd : YAG laser. At this wavelength, a scattering angle of 17-35 • is sufficiently small to achieve a scattering parameter 1 < α < 3. The estimated observational error in the ion temperature T i is expected to be below 10% at n e = 5.0 × 10 20 m −3 and T i = 2.5 eV, for a scattering volume with a length of 2.4 mm using an accumulated scattering energy of 12 J (10 pulses of 1.2 J at 10 Hz). The accuracy in the determination of axial velocity is expected to be about 15%. Setting the required accuracy for ion temperature measurements at 15%, single pulse CTS is expected to be feasible for n e > 1.5 × 10 21 m −3 . The design considerations of the CTS diagnostic are described in this paper.

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Measurement of the ion feature of collective Thomson scattering in collisionless plasmas

Cited by 4 publications

References 6 publications

Collective Thomson scattering system for determination of ion properties in a high flux plasma beam

Collective Thomson scattering system for determination of ion properties in a high flux plasma beam

Incoherent and Collective Thomson Scattering for the Determination of Electron and Ion Properties in Low-Temperature Plasma

Collective Thomson scattering for ion temperature and velocity measurements on Magnum-PSI: a feasibility study

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