A multi-purpose manipulator system for W7-X as user facility for plasma edge investigation

Nicolai, D.; Borsuk, V.; Drews, P.; Grulke, O.; Hollfeld, K. P.; Krings, Th.; Liang, Y.; Linsmeier, Ch.; Neubauer, O.; Satheeswaran, G.; Schweer, B.; Offermanns, Guido

doi:10.1016/j.fusengdes.2017.03.013

Cited by 46 publications

(43 citation statements)

References 4 publications

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“…Additional comparisons with other flow diagnostics can further confirm the quality of the CIS measurements [25]. Suitable candidates are the Mach probes, mounted on the Multi-Purpose Manipulator (MPM) of W7-X [34,37,38]. Good agreement between CIS and Mach probes has already been observed in a recent investigation on the role of plasma currents for the SOL dynamics in W7-X, where similar changes of the plasma flow caused by increasing plasma currents has been found [39].…”

Section: Diagnostic Comparisonmentioning

confidence: 99%

Coherence imaging spectroscopy at Wendelstein 7-X for impurity flow measurements

Perseo

Gradic

König

et al. 2020

Review of Scientific Instruments

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In the last decade, Coherence Imaging Spectroscopy (CIS) has shown distinctive results in measuring ion flow velocities in the edge of magnetically confined plasma devices. Its 2D spatially resolved measurement capabilities and its high optical throughput are ideal for investigating the impurity behavior in the complex 3D magnetic island topology edge of Wendelstein 7-X (W7-X). However, a highly precise and stable calibration method is required for a reliable diagnostic operation. A new level of precision and stability has been achieved for the two CIS systems installed at W7-X with the use of a new calibration source, a continuous tunable laser commercially available only since 2015. A specific prototype model was successfully adapted to the challenging requirements of W7-X, granting high accuracy (±0.01 pm) and flexibility (spectral range: 450-650 nm) in the wavelength calibration required for measuring low-Z impurity ion flow velocities. These features opened up new investigation possibilities on temperature stability and wavelength response of the CIS components, allowing to fully characterize and validate the W7-X systems. The CIS diagnostic was operational throughout the last W7-X experimental campaign. Measured velocities on the order of ∼20-30 km/s were observed, corroborated by comparisons to measurements with Mach probes.

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Section: Diagnostic Comparisonmentioning

confidence: 99%

Coherence imaging spectroscopy at Wendelstein 7-X for impurity flow measurements

Perseo

Gradic

König

et al. 2020

Review of Scientific Instruments

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“…2a. The MPM features a mounting flange made of stainless steel with 6 fixing bolts, a multi-pin connector and a gas feeding connection [3], as shown in Fig. 2b.…”

Section: Engineering Designmentioning

confidence: 99%

“…A multi-purpose manipulator (MPM) system has been developed and installed on the W7-X vessel to investigate the edge plasmas of the stellarator [3] [4]. It is a flexible tool for integration of a variety of different diagnostics as e. g. electrical probes, magnetic coils, material collection, or material exposition probes, and gas injection [5] [6].…”

Section: Introductionmentioning

confidence: 99%

Design of a High Resolution Probe Head for Electromagnetic Turbulence Investigations in W7-X

Agostinetti¹,

Spolaore²,

Brombin³

et al. 2018

IEEE Trans. Plasma Sci.

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An insertable probe head called High Resolution Probe (HRP) has been developed at Consorzio RFX in the framework of the EUROfusion S1 work program and in collaboration with IPP Greifswald, to study the electrostatic and electromagnetic features of turbulence in the edge region of Wendelstein 7-X using the Multi-Purpose Manipulator (MPM). The paper reports the design development of the HRP diagnostic head, from the choice of the sensors to the engineering design. The assumptions and evaluations supporting the main design choices, together with the R&D tests carried out to check the most critical parts, are described in detail.Index Terms-insertable probe, electromagnetic fluctuations, stellarator, W7-X

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“…The PLC sends the voltage and the current which the capacitors will be loaded and receives the actual voltage of the capacitors and further status signals of the power supply. The signals of the Langmuir probes are amplified and conditioned on a printed circuit board which was developed by the IEK-4 of FZJ [5]. The amplifying factor and the measure source (voltage, current) can be selected with digital outputs of the PLC for each channel on the PCB (Printed Circuit Board).…”

Section: Middle Ear Potential [Fast Movement]mentioning

confidence: 99%

“…The optimised magnetic field structure is produced by superconducting coils positioned in a cryostat, which surrounds the inner plasma vessel. Electrical probes and material targets must be transported through the cryostat for investigation of the plasma and plasma-surface interaction near the wall of the inner vessel [4], [5]. The Multi-Purpose Manipulator system is situated at the AEK40 Fig.…”

Section: Introductionmentioning

confidence: 99%

A PCS7-based control and safety system for operation of the W7-X Multi-Purpose Manipulator facility

Satheeswaran

Hollfeld

Drews

et al. 2017

Fusion Engineering and Design

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A multi-purpose manipulator system for W7-X as user facility for plasma edge investigation

Cited by 46 publications

References 4 publications

Coherence imaging spectroscopy at Wendelstein 7-X for impurity flow measurements

Coherence imaging spectroscopy at Wendelstein 7-X for impurity flow measurements

Design of a High Resolution Probe Head for Electromagnetic Turbulence Investigations in W7-X

A PCS7-based control and safety system for operation of the W7-X Multi-Purpose Manipulator facility

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