J. Eriksson
A5054238313- Magnetic confinement fusion research
- Fusion materials and technologies
- Nuclear Physics and Applications
- Laser-Plasma Interactions and Diagnostics
- Ionosphere and magnetosphere dynamics
- Nuclear reactor physics and engineering
- Particle accelerators and beam dynamics
- Ion-surface interactions and analysis
- Superconducting Materials and Applications
- Atomic and Subatomic Physics Research
- Radiation Detection and Scintillator Technologies
- Silicon Carbide Semiconductor Technologies
- Laser-induced spectroscopy and plasma
- Mass Spectrometry Techniques and Applications
- Plasma Diagnostics and Applications
- Polymer Nanocomposite Synthesis and Irradiation
- Diamond and Carbon-based Materials Research
- Semiconductor materials and interfaces
- Nuclear physics research studies
- Fullerene Chemistry and Applications
- Solar and Space Plasma Dynamics
- Radiation Effects in Electronics
- Force Microscopy Techniques and Applications
- Radio Frequency Integrated Circuit Design
- Semiconductor materials and devices
Uppsala University
2015-2024
CEA Cadarache
2024
Linköping University
2024
Lund University
2023
Stora Enso (Germany)
2023
Mälardalen University
2022
Linköping University Hospital
2022
Lawrence Livermore National Laboratory
2021
Royal Military Academy
2020
University of York
2018
Abstract In JET deuterium-tritium (D-T) plasmas, the fusion power is produced through thermonuclear reactions and between thermal ions fast particles generated by neutral beam injection (NBI) heating or accelerated electromagnetic wave in ion cyclotron range of frequencies (ICRFs). To complement experiments with 50/50 D/T mixtures maximizing reactivity, a scenario dominant non-thermal reactivity has been developed successfully demonstrated during second campaign DTE2, as it was predicted to...
Abstract The JET hybrid scenario has been developed from low plasma current carbon wall discharges to the record-breaking Deuterium-Tritium plasmas obtained in 2021 with ITER-like Be/W wall. development started pure Deuterium refinement of current, and toroidal magnetic field choices succeeded solving heat load challenges arising 37 MW injected power ITER like environment, keeping radiation edge core controlled, avoiding MHD instabilities reaching high neutron rates. have re-run Tritium...
Remarkable progress has been made in diagnosing energetic particle instabilities on presentday machines and establishing a theoretical framework for describing them.This overview describes the much improved diagnostics of Alfvén modelling tools developed world-wide, discusses interpreting observed phenomena.A multi-machine comparison is presented giving information performance both different plasma conditions outlining expectations ITER based our present knowledge.
Abstract Ion cyclotron resonance frequency (ICRF) heating has been an essential component in the development of high power H-mode scenarios Jet European Torus ITER-like wall (JET-ILW). The ICRF performance was improved by enhancing antenna-plasma coupling with dedicated main chamber gas injection, including preliminary minimization RF-induced plasma-wall interactions, while RF where optimized for core impurity screening terms ion position and minority hydrogen concentration. impact on...
The JET exploitation plan foresees D–T operations in 2020 (DTE2). With respect to the first campaign 1997 (DTE1), when was equipped with a carbon wall, experiments will be conducted presence of beryllium–tungsten ITER-like wall and benefit from an extended improved set diagnostics higher additional heating power (32 MW neutral beam injection + 8 ion cyclotron resonance heating). There are several challenges presented by new wall: general deterioration pedestal confinement; risk heavy...
This paper summarizes the physical principles behind novel three-ion scenarios using radio frequency waves in ion cyclotron range of frequencies (ICRF). We discuss how to transform mode conversion electron heating into a new flexible ICRF technique for and fast-ion generation multi-ion species plasmas. The theoretical section provides practical recipes selecting plasma composition realize scenarios, including two equivalent possibilities choice resonant absorbers that have been identified....
Abstract ITER is of key importance in the European fusion roadmap as it aims to prove scientific and technological feasibility a future energy source. The EUROfusion consortium labs within Europe contributing preparation exploitation operation aspires exploit outcomes view DEMO. paper provides an overview major progress obtained recently, carried out frame new (initiated 2021) work-package called ‘ Pr eparation I TER O peration’ (PrIO). directly supported by eleven PrIO contributions given...
Observations made in a JET experiment aimed at accelerating deuterons to the MeV range by third harmonic radiofrequency (RF) heating coupled into deuterium beam are reported.Measurements based on set of advanced neutron and gamma-ray spectrometers that, for first time, observe plasma simultaneously along vertical oblique lines sight.Parameters fast ion energy distribution, such as high cut-off deuteron distribution function RF coupling constant, determined from data within uniform analysis...
We demonstrate the measurement of a 2D MeV-range ion velocity distribution function by velocity-space tomography at JET. Deuterium ions were accelerated into third harmonic cyclotron resonance heating. made measurements with three neutron emission spectrometers and high-resolution γ-ray spectrometer detecting γ-rays released in two reactions. The tomographic inversion based on these five spectra is excellent agreement numerical simulations ASCOT–RFOF SPOT–RFOF codes. length measured fast-ion...
The fast-ion distribution from third harmonic ion cyclotron resonance frequency (ICRF) heating on the Joint European Torus is studied using neutron emission spectroscopy with time-of-flight spectrometer TOFOR. energy dependence of fast deuteron function inferred measured spectrum neutrons born in DD fusion reactions, and compared theoretical models for ICRF heating. Good agreements between modelling measurements are seen clear features function, that due to finite Larmor radius resonating...
Neutron emission spectrometry (NES) measures the energies of neutrons produced in fusion reactions. Here we present velocity-space weight functions for NES and neutron yield measurements. Weight show sensitivity as well accessible regions velocity space a given range energy spectrum. Combined with calculated fast-ion distribution function, they determine part function producing detectable range. Furthermore, construct forward model based on capable rapidly calculating spectra. This can be...
This study reports the feasibility of adopting a total endovascular approach for treatment complex abdominal aortic aneurysms (AAAs) at European center and compares short- midterm results against those from large multicenter studies.All patients treated repair (EVAR) juxta/pararenal AAAs or thoracoabdominal (TAAAs), both elective acute, as well reoperations, 2010 to 2015 were included. Treatment was fenestrated (FEVAR) branched (BEVAR), outcomes analyzed technical success mortality 30 90...
Dedicated experiments to generate energetic D ions and fusion-born alpha particles were performed at the Joint European Torus (JET) with ITER-like wall (ILW). Using 3-ion radio frequency (RF) heating scenario, deuterium from neutral beam injection (NBI) accelerated in core of mixed plasmas higher energies ion cyclotron resonance (ICRF) waves, turn leading a core-localized source particles. The fast-ion distribution RF-accelerated D-NBI was controlled by varying ICRF NBI power ( 4–6 MW, 3–20...
Hempseed protein concentrate (HPC) was extracted from hempseed press cake with a content of 85.7% and co-extruded oat fibre residue (OFR) to produce high-moisture meat analogues (HMMA) at different moisture contents (60, 63, 66%), screw speeds (500, 700, 900) temperature profiles (40-70-110-130 °C 40-70-120-150 °C). The effect extrusion processing parameters such as content, speed, on the properties extrudates investigated. produced had fibrous structure brown colour, which may be due...
Abstract The reference ion cyclotron resonance frequency (ICRF) heating schemes for ITER deuterium–tritium (D-T) plasmas at the full magnetic field of 5.3 T are second harmonic and 3 He minority heating. wave-particle location these coincide central a wave 53 MHz T. Experiments have been carried out in major D-T campaign (DTE2) JET, its prior D campaigns, to integrate ICRF scenarios JET high-performance compare their performance with commonly used hydrogen (H) In 50:50 D:T plasmas, up 35% 5%...
Abstract The fast-ion phase-space distribution function in axisymmetric tokamak plasmas is completely described by the three constants of motion: energy, magnetic moment and toroidal canonical angular momentum. In this work, observable regions constants-of-motion phase-space, given a diagnostic setup, are identified explained using projected velocities fast ions along lines-of-sight as proxy for several diagnostics, such <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"...
Abstract Tomographic reconstructions of a 3D fast-ion constants-of-motion phase-space distribution function are computed by inverting synthetic signals based on projected velocities the fast ions along diagnostic lines sight. A spectrum is key element formation in D-alpha spectroscopy, collective Thomson scattering, and gamma-ray neutron emission it can hence serve as proxy for any these. The functions parameterised three constants motion, kinetic energy, magnetic moment toroidal canonical...
Abstract The fusion reaction between deuterium and tritium, D ( T,n ) 4 He is the main source of energy in future thermonuclear reactors. Alpha-particles -ions) born with an average 3.5 MeV transferring to thermal plasma during their slowing down, should provide self-sustained D–T burn. adequate confinement α -particles essential efficient heating bulk steady burning a reactor plasma. That why fusion-born -particle studies have been priority task second experiments (DTE2) on Joint European...
Abstract Data from the MPRu high-resolution neutron spectrometer has been used to estimate two fusion plasma quantities, rotation and thermonuclear emission. This paper presents a framework for this method current results selection of discharges JET DTE3 campaign. collection during was preceded by hardware upgrade in form new digitizers, an update data reduction software. The involves simulations with TRANSP code, DRESS detector response function. emission are estimated through fit simulated...
Abstract We present a method to analytically compute gamma-ray spectra generated via two-step fusion reactions, where is emitted from the excited nucleus in first step of reaction. If one reactant energetic and other at rest, reaction can be treated analytically. The second step, which emission nucleus, always model we derive tested against established forward-model code GENESIS, obtaining very satisfactory results.&#xD;Our fully analytic treatment far less expensive technique than...
Abstract The fast-ion distribution function in fusion plasmas can be inferred by inverting Doppler-shifted measurements from diagnostics. full parametrised three constants of motion with the addition a binary index. However, limited number measurements, cogent prior information must added to regularise inverse problem, enabling reconstruction function. In this paper, we demonstrate how incorporate wave-particle interactions ion cyclotron range frequencies (ICRF) as future ITER tokamak test...
In DT plasmas, toroidal Alfvén eigenmodes (TAEs) can be made unstable by the alpha particles resulting from fusion reactions, and may induce a significant redistribution of fast ions. Recent experiments have been conducted in JET deuterium plasmas order to prepare scenarios aimed at observing alpha-driven TAEs future campaign. Discharges low density, large core temperatures associated with presence internal transport barriers characterised good energetic ion confinement performed. ICRH has...