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Review of Scientific Instruments, ISSN 0034-6748, 11/2016, Volume 87, Issue 11, p. 11E729
This paper describes the design of the Thomson scattering system at the Wendelstein 7-X stellarator. For the first operation campaign we installed a 10 spatial... 
INSTRUMENTS & INSTRUMENTATION | PHYSICS, APPLIED | Raman spectra | Plasma | Hydrogen storage | Temperature profiles | Calibration | Helium | Density | YAG lasers | Semiconductor lasers | Avalanche diodes | Organic light emitting diodes | Digitization | Thomson scattering | Analog to digital converters | Neodymium lasers
Journal Article
Review of Scientific Instruments, ISSN 0034-6748, 10/2018, Volume 89, Issue 10, p. 10C115
This paper presents the approach of the dual-laser wavelength Thomson scattering (TS) system for the Wendelstein 7-X stellarator. The dual-laser wavelength TS... 
CALIBRATION | INSTRUMENTS & INSTRUMENTATION | PHYSICS, APPLIED | Plasma | Design parameters | YAG lasers | Semiconductor lasers | Lasers | High power lasers | Spectra | Calibration | Thomson scattering | Electrons | Neodymium lasers
Journal Article
Physical Review Letters, ISSN 0031-9007, 01/2019, Volume 122, Issue 3, p. 035002
Electron temperature gradient (ETG)-driven turbulence, despite its ultrafine scale, is thought to drive significant thermal losses in magnetic fusion... 
PHYSICS, MULTIDISCIPLINARY | MODES | SIMULATIONS | Turbulence | Turbulent flow | Computer simulation | Temperature gradients | Ultrafines | Stellarators | Transport | Electron energy
Journal Article
Review of Scientific Instruments, ISSN 0034-6748, 03/2019, Volume 90, Issue 3, p. 033505
A new method for in situ spectral calibration of Thomson scattering diagnostics is proposed. The idea of the method is to apply a wavelength tunable optical... 
INSTRUMENTS & INSTRUMENTATION | PHYSICS, APPLIED | DISPERSION | Plasma | Parametric amplifiers | Rayleigh scattering | Laboratories | Optical Parametric Oscillators | Gas pressure | Spectra | Calibration | Laboratory tests | Stray light | Dependence | Spectral sensitivity | Diagnostic systems | Thomson scattering
Journal Article
Review of Scientific Instruments, ISSN 0034-6748, 10/2018, Volume 89, Issue 10, p. 10H115
A passive phased array Doppler reflectometry system has recently been installed in the Wendelstein-7X stellarator. In contrast to conventional Doppler... 
INSTRUMENTS & INSTRUMENTATION | PHYSICS, APPLIED | PROFILE | Reflectometry | Product design | Steering | Balances (scales) | Doppler effect | Antenna arrays
Journal Article
Nuclear Fusion, ISSN 0029-5515, 12/2011, Volume 51, Issue 12, pp. 123010 - 12
Disruption mitigation is mandatory for ITER in order to reduce forces, to mitigate heat loads during the thermal quench and to avoid runaway electrons (REs). A... 
PHYSICS, NUCLEAR | ITER | ALCATOR C-MOD | PHYSICS, FLUIDS & PLASMAS | TOKAMAKS | Halos | Nuclear fusion | Asymmetry | Valves | Disruption | Gas injection | Displacement | Loads (forces)
Journal Article
Physical Review Letters, ISSN 0031-9007, 06/2008, Volume 100, Issue 25, p. 255003
The generation of runaway electrons in the international fusion experiment ITER disruptions can lead to severe damage at plasma facing components. Massive gas... 
LOSSES | PHYSICS, MULTIDISCIPLINARY | PLASMAS | TOKAMAKS | TEXTOR TOKAMAK | RUNAWAY ELECTRONS | 70 PLASMA PHYSICS AND FUSION TECHNOLOGY | ITER TOKAMAK | PERTURBATION THEORY | VACUUM SYSTEMS | GAS INJECTION | FIRST WALL | ARGON
Journal Article
Nuclear Fusion, ISSN 0029-5515, 03/2017, Volume 57, Issue 3, p. 36021
The results of a first systematic assessment of plasma edge transport processes for the limiter startup configuration at Wendelstein 7-X are presented. This... 
radiative cooling | 3D modeling | impurity transport | stellarator | power exhaust | plasma edge physics | Wendelstein 7-X | PHYSICS, FLUIDS & PLASMAS | ISLAND DIVERTOR | MONTE-CARLO | TORE-SUPRA | JET | MAGNETIC-FIELD | PHYSICS | W7-AS | CONFIGURATIONS | Physics
Journal Article
Nuclear Fusion, ISSN 0029-5515, 09/2017, Volume 57, Issue 12, p. 126030
In the first campaign Wendelstein 7-X was operated with five poloidal graphite limiters installed stellarator symmetrically. In an ideal situation the power... 
error fields | stellarator fields | limiter symmetry | limiter | Wendelstein 7-X | PHYSICS, FLUIDS & PLASMAS | FLUX | 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Journal Article
Nuclear Fusion, ISSN 0029-5515, 02/2019, Volume 59, Issue 2, p. 26004
In this paper, vacuum flux surface mapping is used to measure the 1/1 error field in Wendelstein 7-X. Two methods for discriminating the 1/1 perturbation from... 
error fields | error field correction | island divertor | Wendelstein 7-X | PHYSICS, FLUIDS & PLASMAS | MAGNETIC-FIELD | PHYSICS | PROGRAM | 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Journal Article
Fusion Engineering and Design, ISSN 0920-3796, 11/2013, Volume 88, Issue 11, pp. 2997 - 3006
Service oriented architecture based on web-services is a universal method of combining software components. SOAP web-services chosen for W7-X are characterized... 
Web-service | W7-X | SOA | Island divertor | Field line tracing | Integrated modeling | SOAP | WEB SERVICES | NUCLEAR SCIENCE & TECHNOLOGY | EQUATIONS | WORKFLOW | Tracers (Biology) | Design engineering | Software | Architecture (computers) | Soaps | Standards | Tracers | Computer programs
Journal Article
Nuclear Fusion, ISSN 0029-5515, 06/2016, Volume 56, Issue 7, pp. 76002 - 76011
Wendelstein 7-X is an optimized helical axis stellarator that came into operation at the end of 2015. A m/n = 5/5 island chain is used in most of its... 
error fields | island divertor | W7-X | flux surface mapping | OPERATION | PHYSICS, FLUIDS & PLASMAS | PHYSICS, NUCLEAR | Errors | Nuclear fusion | Error analysis | Flux | Chains | Diagnostic systems | Stellarators | Islands
Journal Article
Plasma Physics and Controlled Fusion, ISSN 0741-3335, 10/2008, Volume 50, Issue 10, p. 105007
Runaway electrons represent a serious problem for the reliable operation of the future experimental tokamak ITER. Due to the multiplication factor of exp(50)... 
AVALANCHE | JT-60U TOKAMAK | PHYSICS, FLUIDS & PLASMAS | SYNCHROTRON-RADIATION | JET | DYNAMICS | FAST PLASMA SHUTDOWN | PHYSICS, NUCLEAR | ITER | DIII-D | TERMINATION | DISCHARGES
Journal Article
Nuclear Fusion, ISSN 0029-5515, 08/2018, Volume 58, Issue 10, p. 106029
Global confinement properties of the limiter plasmas of the first operational campaign of W7-X are investigated with special focus on the energy confinement... 
energy confinement | stellarator | Wendelstein 7-X | TRANSPORT-COEFFICIENTS | TOROIDAL PLASMAS | REACTOR | PHYSICS, FLUIDS & PLASMAS | ENGINEERING DESIGN | DENSITY LIMIT | INTERNATIONAL-STELLARATOR-DATABASE | PHYSICS | 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Journal Article
Nuclear Fusion, ISSN 0029-5515, 08/2011, Volume 51, Issue 8, pp. 83033 - 10
Fuelling efficiency is an important parameter in designing a massive gas injection system for suppression of runaway electrons in ITER. In this work... 
OPERATIONAL LIMITS | JT-60U | LOW-DENSITY PLASMA | PHYSICS, FLUIDS & PLASMAS | RUNAWAY CURRENT TERMINATION | CHAPTER 3 | PROFILE MEASUREMENTS | PHYSICS, NUCLEAR | DISRUPTION MITIGATION | TOKAMAK DISCHARGES | ELECTRON-DENSITY | MHD STABILITY | Nuclear fusion | Fuelling | Gas flow | Dynamics | Valves | Unsteady | Gas injection | Dynamical systems
Journal Article
Nuclear Fusion, ISSN 0029-5515, 03/2011, Volume 51, Issue 3, p. 033007
A new disruption mitigation valve, the DMV-30, has been developed and tested. The orifice output area of the valve is a factor of 2.4 and 12.25 times larger... 
OPERATIONAL LIMITS | RUNAWAY ELECTRONS | THERMAL LOAD DISTRIBUTION | ALT-II LIMITER | ALCATOR C-MOD | PHYSICS, FLUIDS & PLASMAS | CHAPTER 3 | ASDEX UPGRADE | PHYSICS, NUCLEAR | DIII-D | PLASMA TERMINATION | MHD STABILITY
Journal Article
Journal of Nuclear Materials, ISSN 0022-3115, 2009, Volume 390, Issue 1, pp. 740 - 746
Runaway electrons generated during ITER disruptions are of concern for the integrity of the plasma facing components. It is expected that a power of up to 8 GW... 
JT-60U | ELECTRONS | MATERIALS SCIENCE, MULTIDISCIPLINARY | DIII-D | PLASMAS | AVALANCHE | NUCLEAR SCIENCE & TECHNOLOGY | MINING & MINERAL PROCESSING | GAS | MITIGATION | TERMINATION | MAJOR DISRUPTIONS | TOKAMAK | Plasma physics | Analysis
Journal Article
Nuclear Fusion, ISSN 0029-5515, 08/2016, Volume 56, Issue 10, p. 106005
Error fields have been detected and quantified using the flux surface mapping diagnostic system on Wendelstein 7-X (W7-X). A low-field 't =1/2' magnetic... 
error fields | W7-X | PHYSICS, FLUIDS & PLASMAS | stellarator | flux surface mapping | 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Journal Article
Journal of Instrumentation, ISSN 1748-0221, 10/2017, Volume 12, Issue 10, pp. P10004 - P10004
The optimized stellarator Wendelstein 7-X started operation in December 2015 with a 10 week limiter campaign. Divertor experiments will begin in the second... 
Data processing methods | Plasma diagnostics - interferometry, spectroscopy and imaging | RAMAN CALIBRATION | DESIGN | INSTRUMENTS & INSTRUMENTATION | PHYSICS
Journal Article
Combustion and Flame, ISSN 0010-2180, 04/2003, Volume 133, Issue 1-2, pp. 133 - 146
An analysis of the ignition of H - and CH - containing mixtures at high temperatures under the action of a nanosecond high-voltage discharge has been performed... 
Combustible mixture | Nanosecond discharge | Ignition
Journal Article
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