A5050459195- Particle accelerators and beam dynamics
- Magnetic confinement fusion research
- Plasma Diagnostics and Applications
- Particle Accelerators and Free-Electron Lasers
- Atomic and Molecular Physics
- Superconducting Materials and Applications
- Gyrotron and Vacuum Electronics Research
- Laser-induced spectroscopy and plasma
- Fusion materials and technologies
- Nuclear Physics and Applications
- Mass Spectrometry Techniques and Applications
- Atomic and Subatomic Physics Research
- Advanced Chemical Physics Studies
- Microbial Natural Products and Biosynthesis
- Spectroscopy and Laser Applications
- Muon and positron interactions and applications
- Plasma Applications and Diagnostics
- Ionosphere and magnetosphere dynamics
- Synthetic Organic Chemistry Methods
- Laser-Plasma Interactions and Diagnostics
- Algal biology and biofuel production
- Advanced Synthetic Organic Chemistry
- Chemical Synthesis and Analysis
- Radiation Therapy and Dosimetry
- Big Data Technologies and Applications
Max Planck Institute for Plasma Physics
2015-2024
École Nationale Supérieure d'Électrotechnique, d'Électronique, d'Informatique, d'Hydraulique et des Télécommunications
2023
Institut National Polytechnique de Toulouse
2023
Laboratoire Plasma et Conversion d'Energie
2023
Max Planck Society
2012-2021
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro
2021
National Agency for New Technologies, Energy and Sustainable Economic Development
2021
University of Padua
2021
Institute of Plasma Physics
2018
Laboratoire de Physique des Gaz et des Plasmas
2013-2018
The development of a large-area RF source for negative hydrogen ions, an official EFDA task agreement, is aiming at demonstrating ITER-relevant ion parameters. This implies current density 200 A m−2 accelerated D− ions filling pressure ⩽0.3 Pa and electron-to-ion ratio ⩽1 from extraction area similar to the positive-ion based sources JET ASDEX Upgrade pulse lengths up 1 h. work progressing along three lines in parallel: (i) optimization densities low electron/ion ratio, utilizing small areas...
The development of negative hydrogen ion sources for neutral beam systems is closely linked with an optimization formation in plasmas, which requires knowledge the plasma parameters. Emission spectroscopy introduced as a non-invasive and situ diagnostic tool line sight averaged Diagnostic lines simplified analysis methods variety parameters, such electron density temperature, gas atomic molecular density, caesium densities (atoms ions), are identified prepared direct application. Emphasis...
The ITER neutral beam system will be equipped with radio-frequency (RF) negative ion sources, based on the IPP Garching prototype source design. Up to 100 kW at 1 MHz is coupled RF driver, out of which plasma expands into main chamber. Compared arc driven sources are maintenance free and without evaporation tungsten. modularity driver concept permits supply large volumes. (one driver) demonstrated operation in hydrogen deuterium up one hour relevant parameters. ELISE test facility operating...
For heating and current drive the neutral beam injection (NBI) system for ITER requires a 1 MeV deuterium up to h pulse length. In order inject required 17 MW large area source (1.9 m × 0.9 m) has deliver 40 A of negative ion at specified pressure 0.3 Pa. 2007, IPP RF driven hydrogen was chosen by board as new reference NBI due to, in principle, its maintenance free operation progress development. The performance analysis sources is strongly supported an extensive diagnostic program...
IPP Garching has successfully developed a RF-driven negative ion source for the ITER neutral beam injection system. The RF is now an interesting alternative to reference design with filamented sources due its in principle maintenance-free operation. Current densities of 330 A m−2 and 230 have been achieved hydrogen deuterium, respectively, at pressure 0.3 Pa electron/ion ratio 1 small extraction area (7.0 × 10−3 m2) short pulses (<4 s). Reliable deuterium operation more than 150 required...
For heating and current drive the neutral beam injection system for ITER requires a deuterium with an energy of 1 MeV up to h. In order inject required 17 MW ion source has deliver 40 A negative current. accelerated density 200 m−2 at specified pressure 0.3 Pa extraction area is 0.2 m2 resulting in large 1.5 × 0.6 m2. Two types sources have been under discussion, filamented arc inductively driven RF source, latter now having chosen reference design. The development sources, which fulfil...
Powerful negative hydrogen ion sources are required for heating and current drive at ITER.The physics of production extraction high currents is much more complex than positive ions.One the most relevant parameters shape plasma sheath, which determines velocity surface produced ions thus probability to reach system.In order investigate influence atoms, caesium on a 1d3v PIC code close system has been developed.For typical such sources, conversion impinging atoms main channel, while plays...
The neutral beam injection systems for the international fusion experiment ITER used heating, current drive, and diagnostic purposes are based on RF-driven negative hydrogen ion sources with a source area of roughly 0.9 m × 1.9 m. operate at 0.3 Pa in deuterium using total available RF generator power 800 kW per frequency 1 MHz. In order to fulfill challenging requirements beyond (like DEMOnstration plant, DEMO), worldwide developments underway addressing topics plasma generation, extraction...
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...
Abstract The vibrationally resolved ground state Yacora model for H2 (Yacora H2(X1, v)) has&#xD;been used to calculate the vibrational distribution and thus from cross-sections of the&#xD;Yacora v) effective rate coefficients molecular processes relevant to&#xD;detachment. A reduced extended implementation was constructed&#xD;to form EIRENE-style databases use in SOLPS-ITER. implementation&#xD;utilises same as EIRENE, but with updated cross-sectional data, whilst...
A new diagnostic method for the determination of negative hydrogen ion densities H− (D−), namely Hα/Hβ line ratio method, is presented and applied to high power (P≈100 kW) sources operating at low pressure (p < 1 Pa). The basis mutual neutralization process which enhances Balmer radiation selectively. Detailed parameter studies carried out with a collisional radiative model show that very well suited obtain in temperature plasmas typical plasma parameters Te ≈ 1–5 eV ne 1016–5 × 1018 m−3....
The ITER neutral beam system requires a negative hydrogen ion of 48 A with an energy 0.87 MeV and deuterium 40 1 MeV. is extracted from large RF driven source the dimension 1.9 × 0.9 m 2 . An important role for transport ions to extractor suppression co-extracted electrons magnetic filter field in front extractor. For will be generated by current up 4 kA flowing through first grid extrapolation results obtained small IPP prototype source, where has different 3D structure as it permanent...
Large and powerful negative hydrogen ion sources are required for the neutral beam injection (NBI) systems of future fusion devices. Simplicity maintenance-free operation favors RF sources, which developed intensively at Max-Planck-Institut für Plasmaphysik (IPP) since many years. The ions generated by caesium-enhanced surface conversion atoms positive on plasma grid surface. With a small scale prototype high current density low fraction co-extracted electrons pressure as well stable pulses...
The primary structure of a 13.6 kDa single heavy chain camelid antibody (V(H)H) was determined by matrix-assisted laser desorption ionization-time-of-flight/time-of-flight (MALDI-TOF/TOF) top-down sequence analysis. majority the obtained mass spectrometric de novo sequencing, with N-terminal 14 amino acid residues being using T(3)-sequencing and database interrogation. confirmed liquid chromatography-tandem spectrometry (LC-MS/MS) analysis tryptic digest, which also provided high-energy...
High power negative hydrogen ion sources operating at 0.3 Pa are a key component of the neutral beam injection systems for international fusion experiment ITER. To achieve required large current tolerable number co-extracted electrons source is equipped with magnetic filter field (up to 10 mT). The IPP prototype (1/8 area ITER source) has been flexible frame perform studies (position, polarity, strength). Axial profiles plasma parameters measured two Langmuir probes, positioned in upper and...
The Max-Planck-Institut für Plasmaphysik test facility ELISE is an important intermediate step towards the in-time realization of ITER neutral beam injection system (NBI). equipped with a large radio-frequency (RF) driven negative hydrogen ion source (1 × 0.9 m2) half size NBI source. paper reports on main results very first operation caesium, but low RF power, both for and deuterium, pulse lengths up to 500 s. are rather encouraging achievement required parameters, especially in hydrogen,...
Hydrogen and nitrogen containing discharges emit intense radiation in a broad wavelength region the VUV. The measured radiant power of individual molecular transitions atomic lines between 117 nm 280 are compared to those obtained visible spectral range moreover RF supplied ICP discharge. In hydrogen plasmas driven at 540 W up 110 radiated VUV, whereas less than 2 is emitted VIS. level about 25 both VUV hydrogen–nitrogen mixtures, NH increases amount. analysis emission supported by...
Population models are a prerequisite for performing qualitative analysis of population densities measured in plasmas or predicting the dependence plasma emission on parameter variations. Models atomic helium and hydrogen as well molecular low-pressure introduced. The cross-sections transition probabilities used input known very accurately, thus benchmark these against experiments is successful. For H2, contrast, significant deviations exist between reaction taken from different literature...
SPIDER is one of the two projects ITER Neutral Beam Test Facility (NBTF) under construction in Padova, Italy, at Consorzio RFX premises; it will have a 100 keV beam source with full-size prototype radiofrequency (RF) ion for Injector (NBI), designed to operate pulse length up 3600 s, featuring ITER-like filter field configuration, caesium oven layout and wide set diagnostics.These features allow reproducing operation like as cannot be done any other existing test facility.SPIDER realization...