M. Chernyshova
A5075603806- Particle Detector Development and Performance
- Magnetic confinement fusion research
- Radiation Detection and Scintillator Technologies
- Nuclear Physics and Applications
- Fusion materials and technologies
- Superconducting Materials and Applications
- Magnetic Field Sensors Techniques
- CCD and CMOS Imaging Sensors
- Magnetic properties of thin films
- Laser-Plasma Interactions and Diagnostics
- Advanced Data Storage Technologies
- Plasma Diagnostics and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Chalcogenide Semiconductor Thin Films
- Atomic and Subatomic Physics Research
- Nuclear reactor physics and engineering
- Electron and X-Ray Spectroscopy Techniques
- ZnO doping and properties
- Quantum Dots Synthesis And Properties
- Ion-surface interactions and analysis
- Parallel Computing and Optimization Techniques
- Physics of Superconductivity and Magnetism
- Magnetic and transport properties of perovskites and related materials
- Copper-based nanomaterials and applications
- Semiconductor materials and devices
Institute of Plasma Physics and Laser Microfusion
2015-2024
CEA Cadarache
2020-2024
Institut de Recherche sur la Fusion par Confinement Magnétique
2024
Culham Science Centre
2024
Culham Centre for Fusion Energy
2024
Royal Military Academy
2020
Kuban State Technological University
2020
Warsaw University of Technology
2020
European Organization for Nuclear Research
2020
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2020
Abstract WEST is an MA class superconducting, actively cooled, full tungsten (W) tokamak, designed to operate in long pulses up 1000 s. In support of ITER operation and DEMO conceptual activities, key missions are: (i) qualification high heat flux plasma-facing components integrating both technological physics aspects relevant particle exhaust conditions, particularly for the monoblocks foreseen divertor; (ii) integrated steady-state at confinement, with a focus on power issues. During phase...
Two Triple Gas Electron Multiplier (Triple-GEM) detectors were developed for high-resolution X-ray spectroscopy measurements tokamak plasma to serve as evolution monitoring in soft region (SXR). They provide energy resolved fast dynamic radiation imaging the SXR with 0.1 kHz frequency. Detectors designed and constructed continuous data-flow precise position measurement of emitted by metal impurities, W46+ Ni26+ ions, at 2.4 keV 7.8 photon energies, respectively. High counting rate capability...
To study the impact of strong impurity radiation on energy confinement and discharge stability at JET-ILW, dedicated high-density, highly heated experiments with neon seeding have been performed. In these an increase in core especially pedestal region plus a characteristic X-point radiator inside confined observed. The increased separatrix had no confinement. Only highest puff rates heating powers () weak H-mode without back-transitions to L-mode (M-mode) could be achieved, while lower or...
Abstract We present an overview of results from a series L–H transition experiments undertaken at JET since the installation ITER-like-wall (JET-ILW), with beryllium wall tiles and tungsten divertor. Tritium, helium deuterium plasmas have been investigated. Initial in tritium show ohmic transitions low density power threshold for ( P LH ) is lower than ones densities, while we still lack contrasted data to provide scaling high densities. In there notable shift which minimum <?CDATA...
Abstract The recent deuterium–tritium campaign in JET-ILW (DTE2) has provided a unique opportunity to study the isotope dependence of L-H power threshold an ITER-like wall environment (Be and W divertor). Here we present results from dedicated transition experiments at JET-ILW, documenting tritium plasmas, comparing them with matching deuterium hydrogen datasets. From earlier it is known that as plasma isotopic composition changes deuterium, through varying deuterium/hydrogen concentrations,...
Integrating the plasma core performance with an edge and scrape-off layer (SOL) that leads to tolerable heat particle loads on wall is a major challenge. The new European medium size tokamak task force (EU-MST) coordinates research ASDEX Upgrade (AUG), MAST TCV. This multi-machine approach within EU-MST, covering wide parameter range, instrumental progress in field, as ITER DEMO core/pedestal SOL parameters are not achievable simultaneously present day devices. A two prong adopted. On one...
The high resolution X-Ray crystal spectrometer at the JET tokamak has been upgraded with main goal of measuring tungsten impurity concentration. This is important for understanding accumulation in plasma after installation ITER-like wall (main chamber: Be, divertor: W). contribution provides details a focus on aspects spectral analysis and parameter calculation. In particular, we describe determination sensitivity: concentration determination.
Implementing tungsten as a plasma facing material in ITER and future fusion reactors will require effective monitoring of not just its level the but also distribution. That can be successfully achieved using detectors based on Gas Electron Multiplier (GEM) technology. This work presents conceptual design detecting unit for poloidal tomography to tested at WEST project tokamak. The current stage development is discussed covering aspects which include detector's spatial dimensions, gas...
X-ray absorption near edge structure (XANES) at the cadmium ${L}_{3}$ and oxygen $K$ edges for CdO thin films grown by pulsed laser deposition method, is interpreted within real-space multiple scattering formalism, FEFF code. The features in experimental spectra are well reproduced calculations a cluster of about six ten coordination shells around absorber Cd O, respectively. calculated projected electronic density states found to be good agreement with unoccupied data allows conclude that...
This article presents a fast charge histogramming method for the position sensitive X-ray GEM detector. The energy resolved measurements are carried out simultaneously 256 channels of whole process is performed in 21 FPGA chips (Spartan-6 series from Xilinx) . results stored an external DDR3 memory. structure electronic measuring equipment and firmware functionality implemented FPGAs described. Examples test presented.
This article debates about data fast acquisition and histogramming method for the X-ray GEM detector. The whole process of is performed by FPGA chips (Spartan-6 series from Xilinx). results are stored in an internal memory then sent to PC. In PC merged processed MATLAB. structure firmware functionality implemented FPGAs described. Examples test measurements presented.
The and 3p–4d inner shell excitation lines in addition to 2p–3s have been identified from the spectrum taken by an upgraded high-resolution x-ray spectrometer. It is found analysis of absolute intensities that W Mo concentrations are range , respectively, with a ratio ∼5% JET ITER-like wall configuration for ELMy H-mode plasmas plasma current 2.0–2.5 MA, toroidal magnetic field 2.7 T neutral beam injection power 14–18 MW. For purpose checking self-consistency, it confirmed concentration...
Abstract The mission of WEST (tungsten-W Environment in Steady-state Tokamak) is to explore long pulse operation a full tungsten (W) environment for preparing next-step fusion devices (ITER and DEMO) with focus on testing the ITER actively cooled W divertor tokamak conditions. Following successful completion phase 1 (2016-2021), 2 started December 2022 lower made entirely ITER-grade mono-blocks. A boronization prior first plasma attempt allowed smooth startup new divertor. Despite reduced...
A novel approach to the Gas Electron Multiplier<sup>1</sup> (GEM) detector readout is presented. Unlike commonly used methods, based on discriminators, and analogue FIFOs,[ method developed uses simultaneously sampling high speed ADCs advanced FPGA-based processing logic estimate energy of every single photon. Such applied GEM strip signal. It especially useful in case crystal-based spectrometers for soft X-rays, where higher order reflections need be identified rejected. For purpose...
The measurement system based on GEM—Gas Electron Multiplier detector is developed for X-ray diagnostics of magnetic confinement tokamak plasmas. paper focused the subject and describes fundamental data processing to obtain reliable characteristics (histograms) useful physicists. required have two steps: 1—processing in time domain, i.e. events selections bunches coinciding clusters, 2—processing planar space cluster identification given structure. So, it software part project between...
JT-60SA, the largest tokamak that will operate before ITER, has been designed and built jointly by Japan Europe, is due to start operation in 2020.Its main missions are support ITER exploitation contribute demonstration fusion reactor machine scenario design.Peculiar properties of JT-60SA its capability produce long-pulse, high-β, highly shaped plasmas.The preparation Research Plan, plasma scenarios, producing physics results not only relevant future experiments, but often constitute...
The presented work is related to the Gas Electron Multiplier (GEM) detector soft X-ray spectroscopy system for tokamak applications. used GEM has one-dimensional, 128 channel readout structure. channels are connected radiation-hard electronics with configurable analog stage and fast ADCs, supporting speeds of 125 MSPS each channel. digitalized data sent directly FPGAs using serial links. preprocessing algorithms implemented in FPGAs, buffering made on-board 2Gb DDR3 memory chips. After...
A comprehensive experimental study on the antiferromagnetic interlayer exchange coupling in high quality epitaxial all-semiconducting $\mathrm{EuS}∕\mathrm{PbS}∕\mathrm{EuS}$ trilayers is reported. The influence of substrates, thickness nonmagnetic $\mathrm{PbS}$ spacer layer, and temperature was investigated by means SQUID magnetometry. In with a between 4 $12\phantom{\rule{0.3em}{0ex}}\AA{}$ low hysteresis loops showed signature coupling. value energy determined simulating data based...
The Triple Gas Electron Multiplier (T-GEM) is presented as soft X-ray (SXR) energy and position sensitive detector for high-resolution diagnostics of magnetic confinement fusion plasmas. Multi-channel measurement system serial data acquisition recognition described. Fundamental characteristics are two dimensional structure. Typical signals ADC – Analog to Digital Converter considered charge value estimation. Coinciding high flux radiation cause the problem cluster identification. amplifier...