Philippe Jacquet
A5102728318- Magnetic confinement fusion research
- Mobile Ad Hoc Networks
- Wireless Networks and Protocols
- Cooperative Communication and Network Coding
- Fusion materials and technologies
- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- Opportunistic and Delay-Tolerant Networks
- Algorithms and Data Compression
- Ionosphere and magnetosphere dynamics
- Laser-Plasma Interactions and Diagnostics
- Cellular Automata and Applications
- Plasma Diagnostics and Applications
- Wireless Communication Networks Research
- Advanced Wireless Network Optimization
- Complex Network Analysis Techniques
- DNA and Biological Computing
- Caching and Content Delivery
- semigroups and automata theory
- Network Traffic and Congestion Control
- Data Management and Algorithms
- Blockchain Technology Applications and Security
- Peer-to-Peer Network Technologies
- Nuclear reactor physics and engineering
- Energy Efficient Wireless Sensor Networks
Institut Néel
2024-2025
Culham Science Centre
2015-2024
United Kingdom Atomic Energy Authority
2020-2024
Institut national de recherche en informatique et en automatique
2004-2024
Inria Saclay - Île de France
2009-2024
École Polytechnique
2005-2024
Centre National de la Recherche Scientifique
2006-2024
Université Grenoble Alpes
2024
Culham Centre for Fusion Energy
2011-2023
Nokia (France)
2016-2020
The LHCb experiment is dedicated to precision measurements of CP violation and rare decays B hadrons at the Large Hadron Collider (LHC) CERN (Geneva). initial configuration expected performance detector associated systems, as established by test beam simulation studies, described.
information, vitesse, performances.
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...
An exact analysis is given of the main parameters that characterize properties Capetanakis-Tsybakov-Mikhailov collision resolution algorithm with free-access (continuous input) protocol. In particular, distributions interval, delay experienced by a packet, and state top level stack maintained are determined.
The W-transport in the core plasma of JET is investigated experimentally by deriving W-concentration profiles from modelling signals soft x-ray cameras. For case pure neutral beam heating W accumulates (r/a < 0.3) approaching W-concentrations 10−3 between sawtooth crashes, which flatten W-profile to a concentration about 3 × 10−5. When central Ion cyclotron resonant additionally applied decays phases that exhibit changed mode activity, while also electron temperature increases and density...
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...
This paper reports the progress made at JET-ILW on integrating requirements of reference ITER baseline scenario with normalized confinement factor 1, a pressure 1.8 together partially detached divertor whilst maintaining these conditions over many energy times. The 2.5 MA high triangularity ELMy H-modes are studied two different configurations D-gas injection and nitrogen seeding. power load reduction N seeding is reported. relationship between an increase in pedestal investigated....
Abstract After the second Deuterium–Tritium Campaign (DTE2) in JET tokamak with ITER-Like Wall (ILW) and full tritium campaigns that preceded followed after DTE2, a sequence of fuel recovery methods was applied to promote removal from wall components. The started several days baking main chamber walls at 240 °C 320 °C. Subsequently, superimposed Ion-Cyclotron Conditioning (ICWC) Glow Discharge (GDC) cleaning cycles deuterium. Diverted plasma operation deuterium different strike point...
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,...
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%...
We investigate the basic question of information theory, namely, evaluation Shannon entropy, and a more general Renyi (1961) for some discrete distributions (e.g., binomial, negative etc.). aim at establishing analytic methods (i.e., those in which complex analysis plays pivotal role) such computations often yield estimates unparalleled precision. The main tool used here is that poissonization depoissonization. illustrate our approach on entropy binomial distribution, is, we prove (n, p)...
We study the benefits of multicast routing in performance mobile ad hoc networks. In particular we show that if a node wishes to communicate with n distinct destinations, can reduce overall network load by factor O (radicn), when used instead unicast. One implications this scaling property consists significant increase total capacity for data delivery. discuss how these results be taken into consideration operation protocol using overlay trees
This paper summarizes the operational experience of ion cyclotron resonant frequency (ICRF) ITER-like antenna on JET aiming at substantially increasing power density in range requirements for ITER combined with load resiliency. An in-depth description its commissioning, aspects and achieved performances is presented.
Abstract Experiments have been performed under the coordination of International Tokamak Physics Activity (ITPA) on several tokamaks, including ASDEX Upgrade (AUG), JET and DIII-D, to characterize increased Ion cyclotron range frequency (ICRF) antenna loading achieved by optimizing position gas injection relative RF antennas. On AUG (with ITER-Like Wall) a 50% increase in was observed when injecting deuterium ELMy H-mode plasmas using mid-plane inlets close powered antennas instead divertor...
The goal of this paper is to increase our understanding the fundamental performance limits mobile and delay tolerant networks (DTNs), where end-to-end multi-hop paths may not exist communication routes only be available through time mobility. We use analytical tools derive generic theoretical upper bounds for information propagation speed in large scale intermittently connected networks. In other words, we upper-bound optimal performance, terms delay, that can achieved using any routing...
Ion cyclotron resonance heating (ICRH) in the hydrogen minority scheme provides central ion and acts favorably on core tungsten transport. Full wave modeling shows that, at medium power level (4 MW), after collisional redistribution, ratio of transferred to ions electrons vary little with (hydrogen) concentration nH/ne but high-Z impurity screening provided by fast temperature increases concentration. The radiated JET discharges has been analyzed a large database covering 2013–2014 campaign....
Classical routing strategies for mobile ad hoc networks operate in a hop by "push mode" basis: packets are forwarded on pre-determined relay nodes, according to previously and independently established link performance metrics (e.g., using hellos or route discovery messages). Conversely, recent research has highlighted the interest developing opportunistic schemes, operating "pull mode": next can be selected dynamically each packet hop, basis of actual network performance. This allows take...