A5089349262- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Nuclear Physics and Applications
- Magnetic confinement fusion research
- Magnetic Field Sensors Techniques
- Fusion materials and technologies
- Advanced Data Storage Technologies
- Plasma Diagnostics and Applications
- CCD and CMOS Imaging Sensors
- Sensor Technology and Measurement Systems
- Parallel Computing and Optimization Techniques
- Atomic and Subatomic Physics Research
- X-ray Spectroscopy and Fluorescence Analysis
- Radiation Effects in Electronics
- Electrostatic Discharge in Electronics
- Embedded Systems Design Techniques
- Wireless Sensor Networks for Data Analysis
- Electron and X-Ray Spectroscopy Techniques
- Superconducting Materials and Applications
- Advanced X-ray and CT Imaging
- Real-Time Systems Scheduling
- Nuclear reactor physics and engineering
- Advanced Data Processing Techniques
- Real-time simulation and control systems
- Advanced Computational Techniques and Applications
Warsaw University of Technology
2015-2024
European Organization for Nuclear Research
2020
Institute of Plasma Physics and Laser Microfusion
2020
Institut de Recherche sur la Fusion par Confinement Magnétique
2016
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...
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 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...
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 Gaseous Electron Multiplier (GEM)-based detector is being developed for soft X-ray diagnostics on tokamaks. Its main goal to facilitate transport studies of impurities like tungsten. Such are very relevant ITER, where the excessive accumulation in plasma core should be avoided. This contribution provides details preliminary tests at ASDEX Upgrade (AUG) with a focus most important aspects operation harsh radiation environment. It was shown that both spatially and spectrally resolved data...
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...
This work refers to the soft X-Ray (SXR) plasma diagnostics system being developed. The goal is compute SXR spectra − energetically and topologically with means of Gas Electron Multiplier (GEM) detector. has two sections: analog signal acquisition part (installed at GEM detector), processing (located in rack). PCI-Express Gen2 interface DDR3 memory are used for data transmission, storage buffering. Xilinx Artix7 FPGAs perform functions. One module (DQM) capable up 64 input channels...
In tokamaks equipped with metallic walls and in particular tungsten, the interplay between particle transport MagnetoHydroDynamic (MHD) activity might lead to impurities accumulation finally sudden plasma termination called disruption. Studying such phenomena is thus essential if stationary discharges are be achieved. On WEST a new SXR diagnostic developed collaboration IPPLM (Poland) Warsaw University of Technology, based on triple Gas Electron Multiplier (GEM) detector. Potential...
The measurement system based on gas electron multiplier detector is developed for soft X-ray diagnostics of tokamak plasmas. multi-channel setup designed estimation the energy and position distribution an source. focal measuring issue charge cluster identification by its value estimation. fast accurate mode serial data acquisition applied dynamic plasma diagnostics. clusters are counted in space determined 2D position, value, time intervals. Radiation source characteristics presented...
A novel approach to two dimensional Gas Electron Multiplier (GEM) detector readout is presented. Unlike commonly used methods, based on discriminators and analogue FIFOs, the method developed uses simulta- neously sampling high speed ADCs with fast hybrid integrator advanced FPGA-based processing logic estimate energy of every single photon. Such a applied GEM strip / pixel signal. It especially useful in case crystal-based spectrometers for soft X-rays, 2D imaging plasma tomography all...
The GEM based detecting system is currently being developed for poloidal tomography to be used at WEST project tokamak. It consists of two detectors planar and cylindrical geometry the vertical horizontal ports, respectively. Several laboratory tests were conducted assess performance prototype verify proposed design. For that, measurements with 55Fe source X-ray generator performed. detector's behavior was tested gas mixtures: Ar/CO2 Ar/CO2/CF4 detector amplification dependencies on high...
This paper presents the results of energy resolution simulation for triple GEM-based detector x-ray quantum 5.9 keV . Photons this are emitted by 55Fe source, which is a standard calibration marker type detectors. The calculations were made in Garfield++ two stages. In first stage, distribution amount primary electrons generated drift volume was simulated using Heed program. Secondly, resulting quantitative treated as source electron avalanches propagated through whole detector. obtained...
This work refers to the measurement system for soft-X-ray radiation (SXR) diagnostics using gaseous electron multiplier (GEM) detectors. In terms of tokamak plasma parameter control and optimization, it is important determine level SXR generated by plasma. describes whole including GEM detector, electronic modules, data acquisition (DAQ) path. The structure DAQ presented in hardware, firmware, software architecture. currently developed hardware allows sampling detector signals with 125-MHz...
Abstract Soft X-ray (SXR) radiation emitted from tokamak plasmas contains very useful information about plasma stability, shape and impurity content, all key parameters to improve performance. In the deuterium-tritium phase of ITER, high neutron fluxes, gamma hard emission will constitute too harsh an environment permit use classical semiconductor detectors. New SXR detector technologies, more robust such environments, should thus be investigated. First GEM (Gas Electron Multiplier)...
This paper describes current status of electronics, firmware and software development for new plasma measurement system use in WEST facility. The allows to perform two dimensional visualization (in time) with spectrum measurement. analog front-end is connected Gas Electron Multiplier detector (GEM detector). architecture have high data throughput due PCI-Express interface, Gigabit Transceivers sampling frequency ADC integrated circuits. hardware based on several years experience building...
This article proposes new method of storing data and transferring it to PC in the X-ray GEM detector system. The whole process is performed by FPGA chips (Spartan-6 series from Xilinx). Comparing previous methods, approach allows store much more New, improved implementation communication algorithm significantly increases transfer rate between system PC. In merged processed MATLAB. structure firmware implemented FPGAs described.
This article is an assessment of potential parallelization histogramming algorithms in GEM detector system. Histogramming and preprocessing MATLAB were analyzed with regard to adding parallelism. Preliminary implementation parallel strip resulted speedup. Analysis parallelizability presented. Overview hardware software support implement algorithm discussed.
The tokamak WEST (Tungsten Environment in Steady-State Tokamak) will start operating by the end of 2016 as a test bed for ITER divertor components long pulse operation. In this context, radiative cooling heavy impurities like tungsten (W) Soft X-ray (SXR) range [0.1 keV; 20 keV] is critical issue plasma core performances. Thus reliable tools are required to monitor local impurity density and avoid W accumulation. SXR diagnostic be equipped with two new GEM (Gas Electron Multiplier) based...
An increased attention to tungsten material is related a fact that it became main candidate for the plasma facing in ITER and future fusion reactor. The proposed work refers studies of W influence on performances by developing new detectors based Gas Electron Multiplier GEM) technology tomographic transport ITER-oriented tokamaks, e.g. WEST project. It presents current stage design cylindrically bent SXR GEM detector construction horizontal port implementation. Concept overcome an...
Soft X-ray (SXR) measurement systems working in tokamaks or with laser generated plasma can expect high photon fluxes. Therefore it is necessary to focus on data processing algorithms have the best possible efficiency term of processed events per second. This paper refers recently designed algorithm and data-flow for implementation charge acquisition FPGA. The are currently stage soft diagnostics system. In this despite also described general firmware overview, storage methods other key...
This article concerns optimization methods for data analysis the X-ray GEM detector system. The offline of collected samples was optimized MATLAB computations. Compiled functions in C language were used with MEX library. Significant speedup received both ordering-preprocessing and histogramming samples. Utilized techniques obtained results are presented.