A5051930917- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- Particle Detector Development and Performance
- Particle physics theoretical and experimental studies
- Atomic and Molecular Physics
- Plasma Diagnostics and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Distributed and Parallel Computing Systems
- Muon and positron interactions and applications
- Radiation Therapy and Dosimetry
- Electron and X-Ray Spectroscopy Techniques
- High-Energy Particle Collisions Research
- Ion-surface interactions and analysis
- Magnetic confinement fusion research
- Quantum Chromodynamics and Particle Interactions
- Mass Spectrometry Techniques and Applications
- International Science and Diplomacy
- Advanced Data Storage Technologies
- X-ray Diffraction in Crystallography
- Nuclear Physics and Applications
- Neutrino Physics Research
- Radiation Effects in Electronics
- Atomic and Subatomic Physics Research
- Quantum Mechanics and Applications
European Organization for Nuclear Research
2008-2022
GANIL
2017
Technische Universität Dresden
1995-2000
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
1994
CEA Grenoble
1993
The physics programme and the design are described of a new collider for particle nuclear physics, Large Hadron Electron Collider (LHeC), in which newly built electron beam 60 GeV, up to possibly 140 energy collides with intense hadron beams LHC. Compared HERA, kinematic range covered is extended by factor twenty negative four-momentum squared, $Q^2$, inverse Bjorken $x$, while luminosity $10^{33}$ cm$^{-2}$s$^{-1}$ LHeC projected exceed integrated HERA two orders magnitude. devoted an...
Elastic scattering of electrons from heavy, multiply charged ions has been studied at collision energies below 50 eV. Differential cross sections have measured angles between 30\ifmmode^\circ\else\textdegree\fi{} and 90\ifmmode^\circ\else\textdegree\fi{} for the ${\mathrm{Xe}}^{6+}$, ${\mathrm{Xe}}^{8+}$, ${\mathrm{Ba}}^{2+}$. In angular range considered, experimental values deviate strongly Rutherford section, revealing importance short-range contributions to amplitude. The agree well with...
The Neutrino Factory is a new concept for an accelerator that produces high-intensity, high-energy beam of electron and muon neutrinos – the ultimate tool neutrino oscillation studies only machine conceived up today could help detect CP violation leptons. basic production from decay muons. Due to their short lifetime, these muons have be accelerated very fast. Several techniques, like high-intenstiy proton linac, high-power targets, ionization cooling or recirculating linacs are required....
The ion-induced desorption experiment, installed in the CERN Heavy-Ion Accelerator LINAC 3, has been used to measure molecular yields for $4.2\text{ }\text{ }\mathrm{MeV}/\mathrm{u}$ lead ions impacting under grazing incidence on different accelerator-type vacuum chambers. Desorption ${\mathrm{H}}_{2}$, $\mathrm{C}{\mathrm{H}}_{4}$, CO, and $\mathrm{C}{\mathrm{O}}_{2}$, which are of fundamental interest future accelerator applications, reported stainless steel surface treatments. In order...
As part of the CERN accelerator complex upgrade, a new linear for H− (Linac4) will start its operation in 2014. The source this linac be 2 MHz rf driven which is copy very successful from DESY. In paper design and first results commissioning are reported. has progressed successfully, no major obstacles have been identified prevent reaching goal 80 mA beam current, 45 keV energy, 0.4 ms pulse length, Hz repetition rate. producing up until now stable 23 mA, 35 keV, with rate 0.83 Hz.
The ion charge state distribution in EBIS and EBIT as well the corresponding current outputs from this devices are modelled for different possible trap operating modes. Thereby, a model was developed calculation of distributions considering single double ionization exchange processes, radiative recombination strong cooling. A detailed description is given. computer code based on able to calculate basic parameters: spectrum, temperatures output beam currents. Simulation results given...
This report sums up in two volumes the first 50 years of operation CERN Proton Synchrotron. After an introduction on genesis machine, and a description its magnet powering systems, volume focuses some many innovations accelerator physics instrumentation that it has pioneered, such as transition crossing, RF gymnastics, extractions, phase space tomography, or transverse emittance measurement by wire scanners. The second describes other machines PS complex: proton linear accelerators, Booster,...
The effect of double frequency heating on the performance CERN GTS-LHC 14.5 GHz Electron Cyclotron Resonance (ECR) ion source in afterglow mode is reported. secondary microwave was operated both pulsed and continuous wave (CW) modes within range 12--18 GHz. results demonstrate that addition can significantly impact extracted beam currents temporal stability during discharge. For example, up to a factor 2.6 increase achieved for ${^{208}\mathrm{Pb}}^{35+}$ 3.1 ${^{208}\mathrm{Pb}}^{37+}$...
The major infrastructures of nuclear physics in Europe adopted the technology electron cyclotron resonance (ECR) ion sources for production heavy-ion beams. Most them use 14GHz (ECRISs), except at INFN-LNS, where an 18GHz superconducting ECRIS is operation. In past five years it was demonstrated, frame EU-FP5 RTD project called “Innovative ECRIS,” that further enhancement performances requires a higher frequency (28GHz and above) magnetic field (above 2.2T) hexapolar field. Within EU-FP6...
Intense heavy ion beam production with electron cyclotron resonance (ECR) sources is a common requirement for many of the accelerators under construction in Europe and elsewhere. An average increase about one order magnitude per decade performance ECR was obtained up to now since time pioneering experiment R. Geller at CEA, Grenoble, this trend not deemed get saturation least next decade, according increased availability powerful magnets microwave generators. Electron density above 10(13)...
Future requirements on higher beam intensity and brightness will need an upgrade of the present CERN accelerator chain. Linac4 be essential part proton facility. The source for this H(-) linac based a copy DESY rf driven source. New possible radio frequency quadrupole alternatives (with different injection energies) pressing schedule made it necessary to develop flexible two-source design.
CERN’s Linac4 is a 160 MeV linear accelerator currently under construction. It will inject negatively charged hydrogen ions into PS-Booster. Its ion source noncesiated rf driven H− volume directly inspired from the one of DESY and aimed to deliver pulses 80 mA during 0.4 ms at 2 Hz repetition rate. The Superconducting Proton Linac (SPL) project part luminosity upgrade Large Hadron Collider. consists an extension up 5 GeV foreseen protons future 50 synchrotron (PS2). For SPL high power option...
Using a high-resolution x-ray crystal diffraction spectrometer, line widths of the Kα1,2 lines Fe, Co, Ni and Cu were analysed. Thereby, an evolutionary strategy was used for spectrum deconvolution to determine life-time governed contributions widths. On this basis, L2–L3X Coster–Kronig are calculated assumptions about energetics radiationless transitions derived. © 1998 John Wiley & Sons, Ltd.
The Superconducting Proton Linac (SPL) is a novel linear accelerator concept currently studied at CERN. As part of this study, new Cs‐free, RF‐driven external antenna H− plasma generator has been developed to withstand an average thermal load 6 kW. magnetic configuration the includes dodecapole cusp field and filter separating heating production regions. Ferrites surrounding RF serve in enhancing coupling plasma. Due space requirements chamber cooling circuit, magnets are pushed outwards...