A5062779921- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- Particle Detector Development and Performance
- Plasma Diagnostics and Applications
- Gyrotron and Vacuum Electronics Research
- Magnetic confinement fusion research
- Muon and positron interactions and applications
- Radiation Therapy and Dosimetry
- Engineering Applied Research
- Advancements in Photolithography Techniques
- Microwave Engineering and Waveguides
- Nuclear and radioactivity studies
- Radio Frequency Integrated Circuit Design
- Semiconductor materials and devices
- Advanced Power Amplifier Design
- Wireless Power Transfer Systems
- Vehicle Dynamics and Control Systems
- Radiation Effects in Electronics
- Semiconductor Lasers and Optical Devices
- Magnetic Bearings and Levitation Dynamics
- Acoustic Wave Resonator Technologies
- Advanced MEMS and NEMS Technologies
- Environmental Monitoring and Data Management
- Quantum optics and atomic interactions
European Organization for Nuclear Research
2010-2023
CERN's Linac4 45 kV H− ion sources prototypes are installed at a dedicated source test stand and in the tunnel. The operation of pulsed hydrogen injection, RF sustained plasma, high voltages described. first experimental results two relying on 2 MHz RF-plasma heating presented. plasma is ignited via capacitive coupling, by inductive coupling. light emitted from collected viewports pointing to chamber wall middle solenoid axis. Preliminary measurements optical emission spectroscopy photometry...
CERN’s 160 MeV H− linear accelerator (Linac4) is a key constituent of the injector chain upgrade Large Hadron Collider that being installed and commissioned. A cesiated surface ion source prototype tested has delivered beam intensity 45 mA within an emittance 0.3 π ⋅ mm mrad. The optimum ratio co-extracted electron- to ion-current below 1 best production efficiency, defined as current 2 MHz RF-power transmitted plasma, reached 1.1 mA/kW. first tests new optics, electron-dump, front end...
Two volume sources equipped with DESY and CERN plasma generators a low voltage electron dump were operated at 45 kV in the Linac4 tunnel on dedicated test stand. These delivered approximately 20 mA ensured commissioning of Radio Frequency Quadrupole accelerator first section Drift Tube Linac. CERN's prototype cesiated surface source this was continuously from November 2013 to April 2014 ion stand is being commissioned tunnel. Before cesiation, conditioned mode provided up 30 H− beam. Short...
Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation J. Lettry, D. Aguglia, Y. Coutron, E. Chaudet, A. Dallocchio, Gil Flores, Hansen, Mahner, S. Mathot, Mattei, O. Midttun, P. Moyret, Nisbet, M. O'Neil, Paoluzzi, C. Pasquino, H. Pereira, Sanchez Arias, Schmitzer, R. Scrivens, Steyaert; H− ion sources for CERN's Linac4. AIP Conference Proceedings 8 February 2013;...
Numerical simulation of the CERN LINAC4 H(-) source 2 MHz RF system has been performed taking into account a realistic geometry from 3D Computer Aided Design model using commercial FEM high frequency code. The effect plasma added to by approximation homogenous electrically conducting medium. Electric and magnetic fields, power losses, impedance circuit have calculated for different values conductivity. Three regimes found depending on conductivity: (1) Zero or low conductivity results in...
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.
Linac4 cesiated surface H− sources are routinely operated for the commissioning of CERN's and on an ion source test stand. Stable current 40-50 mA achieved but transmission through LEBT 80% was below expectations triggered additional beam simulation characterization. The profile is not Gaussian emittance measurements larger than simulation. status ongoing development work described; 36 20 D− beams were produced with a 5.5 mm aperture source. emittances measured at stand presented. During...
Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation M. Paoluzzi, Haase, J. Marques Balula, D. Nisbet; CERN LINAC4 H− Source SPL plasma generator RF systems, power coupling impedance measurements. AIP Conference Proceedings 26 September 2011; 1390 (1): 265–271. https://doi.org/10.1063/1.3637396 Download citation file: Ris (Zotero) Reference Manager EasyBib...
The lead-lead physics program of LHC relies on major changes the CERN ion injector chain. In this framework, conversion LEAR (low energy antiproton ring) into Low Energy Ion Ring (LEIR) is central and implies a new accelerating system covering wide frequency range (0.35 - 5 MHz) with moderate voltage (4 kV). For purpose two wide-bandwidth cavities, loaded Finemet® magnetic alloy cores, have been built in collaboration KEK. Two 60 kW RF power amplifiers also systems are now installed LEIR...
The potential for a superconducting proton linac (SPL) at CERN started to be seriously considered the end of 1990s. In first conceptual design report (CDR), published in 2000 [1], most 352 MHz RF equipment from LEP was re-used an 800 m long linac, and beam energy limited 2.2 GeV. During following years, revisited optimized better match needs high-power driver neutrino physics. result more compact (470 long) accelerator capable delivering 5 MW power 3.5 GeV, using state-of-the-art cavities...
A simplified scheme for the provision of antiprotons at 100 MeV/c based on fast extraction is described. The uses existing p~ production target area and modified Antiproton Collector Ring in their current location. physics programme largely capturing storing Penning traps spectroscopy antihydrogen. machine modifications necessary to deliver batches 1/spl times/10/sup 7/ p~/min are Details layout experimental AAC Hall given.
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...
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...
The H− source for the Linac4 accelerator at CERN uses an RF driven plasma production of H−. is supplied by a 2 MHz tube amplifier with maximum power output 100 kW and pulse duration up to ms. low-level signal generation measurement system has been developed using standard controls electronics in VME form factor. frequency amplitude reference signals are generated separate arbitrary waveform generator channels. both freely programmable over pulse, which allows fine-tuning excitation....
Linac4 is a normal conducting 160 MeV Hlinear accelerator presently being installed and progressively commissioned at CERN. It will replace the ageing 50 Linac2 as injector of PS Booster (PSB), increasing same time its brightness by factor two thanks to higher injection energy. This be first step program increase beam in LHC injectors for needs High-Luminosity project. After series measurements on dedicated test stand 3 front-end, including ion source, RFQ chopping line, has been...