A5001137697- Magnetic confinement fusion research
- Laser-induced spectroscopy and plasma
- Plasma Diagnostics and Applications
- Fusion materials and technologies
- Laser-Plasma Interactions and Diagnostics
- Atomic and Molecular Physics
- Ionosphere and magnetosphere dynamics
- Particle Detector Development and Performance
- Particle accelerators and beam dynamics
- Solar and Space Plasma Dynamics
- Superconducting Materials and Applications
- Astronomical Observations and Instrumentation
- Radiation Detection and Scintillator Technologies
- Nuclear Physics and Applications
- Photocathodes and Microchannel Plates
- Analytical chemistry methods development
- Nuclear Materials and Properties
- Mass Spectrometry Techniques and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Advanced Theoretical and Applied Studies in Material Sciences and Geometry
- Electric Power Systems and Control
- Nuclear reactor physics and engineering
- Calibration and Measurement Techniques
- Aerospace Engineering and Control Systems
- Dust and Plasma Wave Phenomena
Institute of Plasma Physics and Laser Microfusion
2016-2024
Max Planck Society
2016
Max Planck Institute for Plasma Physics - Greifswald
2016
Australian National University
2016
Oak Ridge National Laboratory
2016
Physikalisch-Technische Bundesanstalt
2016
University of Opole
2016
CEA Cadarache
2016
National Institute for Fusion Science
2016
Culham Science Centre
2016
Abstract Fusion energy research has in the past 40 years focused primarily on tokamak concept, but recent advances plasma theory and computational power have led to renewed interest stellarators. The largest most sophisticated stellarator world, Wendelstein 7-X (W7-X), just started operation, with aim show that earlier weaknesses of this concept been addressed successfully, intrinsic advantages persist, also at parameters approaching those a future fusion plant. Here we first physics...
The provision of a particle and power exhaust solution which is compatible with first-wall components edge-plasma conditions key area present-day fusion research mandatory for successful operation ITER DEMO. work package plasma-facing (WP PFC) within the European programme complements laboratory experiments, i.e. in linear plasma devices, electron ion beam loading facilities, studies performed toroidally confined magnetic such as JET, ASDEX Upgrade, WEST etc. connection both groups done via...
Wendelstein 7-X, a superconducting optimized stellarator built in Greifswald/Germany, started its first plasmas with the last closed flux surface (LCFS) defined by 5 uncooled graphite limiters December 2015. At end of 10 weeks long experimental campaign (OP1.1) more than 20 independent diagnostic systems were operation, allowing detailed studies many interesting plasma phenomena. For example, fast neutral gas manometers supported video cameras (including one fast-frame camera frame rates...
Abstract Recently, experiments on basic plasma physics issues for solving future problems in fusion energy have been performed a Large Helical Device. There are several to be solved devices energy. Emerging burning are: alpha-channeling (ion heating by alpha particles), turbulence and transport electron dominant helium ash exhaust, reduction of the divertor heat load. To solve these problems, understanding (1) wave–particle interaction through (inverse) Landau damping, (2) characteristics...
Abstract After a long device enhancement phase, scientific operation resumed in 2022. The main new components are the water cooling of all plasma facing and water-cooled high heat flux divertor units. Water allowed for first long-pulse campaign. A maximum discharge length 8 min was achieved with total heating energy 1.3 GJ. Safe demonstrated attached detached mode. Stable detachment is readily some magnetic configurations but requires impurity seeding small pitch angle within edge islands....
Laser Induced Breakdown Spectroscopy (LIBS) provides chemical information from atomic and ionic plasma emissions generated by laser vaporization of a sample. At the ENEA research center, in collaboration with IPPLM, an equipment has been set up to qualitatively quantitatively determine composition impurities deposited on Plasma Facing Components (PFC). The strength LIBS, for its capability light elements detection, is fully exploited deuterium content since this element can be considered as...
Observations on confinement in the first experimental campaign optimized Stellarator Wendelstein 7-X are summarized. In this phase W7-X was equipped with five inboard limiters only and thus discharge length restricted to avoid local overheating. Stationary plasmas limited low densities <2–3 · 1019 m−3. With available 4.3 MW ECR Heating core Te ~ 8 keV, Ti 1–2 keV achieved routinely resulting energy time τE between 80 ms 150 ms. For these conditions show characteristics of electron root...
This work relates to development of diagnostics for radiation power (Prad) and soft x-ray (SXR) intensity measurements in DEMO. A modular, multi-chamber, multi-channel SXR detection system based on gas electron multiplier technology lateral configuration is currently conceptual design phase. The high magnetic fields expected at the planned detector positions diagnostic ports tokamak must be considered design. present study examines two contributions its influence. first one pertained...
The paper reports on the optimization process of soft X-ray pulse height analyzer installed Wendelstein 7-X (W7-X) stellarator. It is a 3-channel system that records spectra in range from 0.6 to 19.6 keV. spectra, with temporal and spatial resolution 100 ms 2.5 cm (depending selected slit sizes), respectively, are line integrated along line-of-sight crosses near plasma center. In second W7-X operation phase carbon test divertor unit, light impurities, e.g., oxygen, were observed as well mid-...
Abstract This work describes the progress of development total core radiation power and soft X-ray (SXR) diagnostic system designed in accordance with DEMO control requirements. Monitoring energy loss through separatrix is necessary for reliable plasma control. Data gathered by this could also be helpful studying spatial distribution heavy impurities, MHD modes their localization, shape position. Gas electron multiplier (GEM) technology assessed as a base new radiated SXR measurement system....
The “C/O Monitor” system for the Wendelstein 7-X (W7-X) stellarator is a dedicated spectrometer with high throughput and time resolution (order of 1 ms) fast monitoring content low-Z impurities in plasma. observed spectral lines are fixed to Lyman-α H-like atoms carbon (3.4 nm), oxygen (1.9 nitrogen (2.5 boron (4.9 nm). quality wall condition will be monitored by measurements being released from walls during experiments. strong presence an indication enhanced plasma-wall interaction or...
The Pulse Height Analysis (PHA) system at Wendelstein 7-X (W7-X) is a broad energy range spectrometer dedicated to the observation of impurity behaviour during plasma discharges. measures spectra in between 0.5 and 20 keV, from integrated signals along three lines sight that pass close center. During recent operational phase W7-X, TESPEL (Tracer-Encapsulated Solid PELlet) injector has been commissioned. By this injector, polystyrene pellets with single tracer as well multiple impurities have...
The purpose of this research is to design and construct a plasma radiation imaging system for fusion devices which focused on soft X-ray region from about 2 15 keV photon energy. proposed 2D diagnostic system, as opposed conventional 1D systems, expected benefit tangential field view deliver new data toroidal phenomena observations. This contribution relates the introductory development such laying out details overall detecting unit (based GEM technology) well its acquisition module. results...