An Enhanced Plasma Control for Asdex Upgrade

Neu, G.; Aubanel, C.; Mertens, V.; Raupp, G.; Richter, H.; Zasche, D.; Zehetbauer, T.

doi:10.1016/b978-0-444-82220-8.50136-9

Cited by 4 publications

(3 citation statements)

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“…INTRODUCTION and successfully operated [4]. It is able to perfonn a number of independent single variable control algorithms, which has also been done by other experiments [5,6, 71.…”

mentioning

confidence: 88%

Management of real time processes for plasma parameter optimization at ASDEX upgrade

Zehetbauer

Aubanel

Mertens

et al. 1996

IEEE Trans. Nucl. Sci.

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Beyond optimization of position and shape control, producing high performance plasmas relies on precise and coordinated control of plasma parameters. This requires a universal platform, into which control algorithms can flexibly be integrated to adapt to interesting discharge scenarios. With the multitude of processes expected to be implemented, management of real time processes becomes crucial. In this paper we shall demonstrate how this issue is raised by the requirement specification of the controller and how it influences its design, implementation and operation.

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“…INTRODUCTION and successfully operated [4]. It is able to perfonn a number of independent single variable control algorithms, which has also been done by other experiments [5,6, 71.…”

mentioning

confidence: 88%

Management of real time processes for plasma parameter optimization at ASDEX upgrade

Zehetbauer

Aubanel

Mertens

et al. 1996

IEEE Trans. Nucl. Sci.

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“…To control the power flux through the pedestal independently from the divertor heat flux, multispecies impurity seeding has to be applied. Initial experiments have been performed with combined N and Ar injection [39].…”

Section: High-power Exhaust Experimentsmentioning

confidence: 99%

Overview of ASDEX Upgrade results

Kallenbach¹,

Adámek²,

Aho-Mantila³

et al. 2011

Nucl. Fusion

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“…Over the last decade the 3d 10 -3d 9 4s E2 and M3 lines in Ni-like W 46+ have been a subject of extensive analysis, in part due to importance of tungsten for ITER research (e.g., [8]). The low-resolution tokamak and EBIT measurements [9,10] recorded an unresolved spectral feature due to an overlap of these two close lines near 0.74 nm.…”

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confidence: 99%

Infrared and visible laser spectroscopy for highly-charged Ni-like ions

Ralchenko

2017

Nuclear Instruments and Methods in Physics Research Section B:

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Application of visible or infrared (IR) lasers for spectroscopy of highlycharged ions (HCI) has not been particularly extensive so far due to a mismatch in typical energies. We show here that the energy difference between the two lowest levels within the first excited configuration 3d 9 4s in Ni-like ions of heavy elements from Z N =60 to Z N =92 is within the range of visible or near-IR lasers. The wavelengths of these transitions are calculated within the relativistic model potential formalism and compared with other theoretical and limited experimental data. Detailed collisional-radiative simulations of non-Maxwellian and thermal plasmas are performed showing that photopumping between these levels using relatively moderate lasers is sufficient to provide a two-order of magnitude increase of the pumped level population. This accordingly results in a similar rise of the x-ray line intensity thereby allowing control of x-ray emission with visible/IR lasers. Keywords: Ni-like ions, visible and infrared lasers, spectroscopyLaser spectroscopy [1] has become one of the most exciting and successful fields of research. Its ubiquitous applications extend from laser-induced breakdown spectroscopy (LIBS) to laser cooling of atoms and molecules to optical lattices, to name a few. In practically all applications it is the neutral or lowcharge atoms (or molecules) that are the subject of visible or infrared (IR) laser

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An Enhanced Plasma Control for Asdex Upgrade

Cited by 4 publications

References 0 publications

Management of real time processes for plasma parameter optimization at ASDEX upgrade

Management of real time processes for plasma parameter optimization at ASDEX upgrade

Overview of ASDEX Upgrade results

Infrared and visible laser spectroscopy for highly-charged Ni-like ions

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