A5088362538- Particle Accelerators and Free-Electron Lasers
- Gyrotron and Vacuum Electronics Research
- Particle accelerators and beam dynamics
- Pulsed Power Technology Applications
- Superconducting Materials and Applications
- Electrostatic Discharge in Electronics
- Particle Detector Development and Performance
- Genetic factors in colorectal cancer
- Cancer Immunotherapy and Biomarkers
- Human-Automation Interaction and Safety
- HVDC Systems and Fault Protection
- Microscopic Colitis
- Colorectal Cancer Treatments and Studies
- Particle physics theoretical and experimental studies
- Military Strategy and Technology
- Electromagnetic Launch and Propulsion Technology
- Microgrid Control and Optimization
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Silicon Carbide Semiconductor Technologies
- Electromagnetic Simulation and Numerical Methods
- High-Voltage Power Transmission Systems
- Power Quality and Harmonics
- Power System Optimization and Stability
- Magnetic Field Sensors Techniques
European Organization for Nuclear Research
2016-2025
Monash University
2001-2022
Istituto Nazionale di Fisica Nucleare, Galileo Galilei Institute for Theoretical Physics
2022
DEVCOM Army Research Laboratory
1996-2020
Roche (United States)
2019
ABB (Switzerland)
2017
University of Manchester
2002-2017
Swedish Academy
2014
Lund University
2014
Instituto de Física Corpuscular
2014
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBall and Socket Nanostructures: New Supramolecular Chemistry Based on CyclotriveratryleneJonathan W. Steed, Peter C. Junk, Jerry L. Atwood, Michael J. Barnes, Colin Raston, Robert S. BurkhalterCite this: Am. Chem. Soc. 1994, 116, 22, 10346–10347Publication Date (Print):November 1, 1994Publication History Published online1 May 2002Published inissue 1 November...
Abstract Ferrites are an essential material in modern industry due to their exceptional magnetic properties and high resistivity. Many applications of ferrites necessitate exposure energy electrons, particularly space science particle accelerators, where charging, multipacting, electron clouds (ECs) major issues. ECs particular concern around the Ni/Zn soft ferrite kicker magnets as large hadron collider (LHC) undergoes its luminosity upgrade. Here, laser engineered surface structures (LESS)...
Two electrical models of a lead–acid battery, short-term discharge model and long-term integrated model, were used to investigate the system performance battery-supported dynamic voltage restorer (DVR). The provides simple but effective description when DVR compensates sags over short period. can predict accurately terminal voltage, state charge, battery capacity gassing current. It gives good response during both charge. Parameters be determined easily from measured output voltages obtained...
Excess cyclotriveratrylene (CTV) and C60 in toluene results micelle-like aggregation of the fullerenes arising from CTV polarisation fullerene, leading to a one-dimensional zigzag polymeric array solid state, each cavity molecule.
Abstract Technological advances and environmental pressures are driving the interconnection of renewable energy sources to distribution network. The large amounts non-traditional generation however causes problems in a network designed for 'conventional' operation. use power electronics interfaces 'bundling' micro-generation loads into so-called Microgrids, offers potential solution. Each Microgrid is operate as 'good citizen' or near ideal conventional load. This paper discusses various...
This study investigated antecedents of the human grief response which was associated with death a pet cat or dog. The sample included 207 voluntary subjects who experienced this type loss within one-year time period prior to participating in study. Data for predictor variables were obtained from two validated instruments and questionnaire developed by author. outcome another instrument on three clinical validity scales. results indicated that level attachment deceased pet, perceived...
In this paper, the analytical and practical design issues of a software phase-locked loop (SPLL) for DVR are presented. A SPLL model that uses lag/lead controller, is derived in order to analyse system performance filtering characteristic by use bode diagrams root-locus methods. applications, parameters controller not only dependent on steady state dynamic state, but also conditions such as utility unbalance, voltage sag/swell magnitude, harmonics, phase jumps frequency variations....
Modular Multilevel Converters (MMC) are presently the converter topology of choice for Voltage Source Converter High DC (VSC-HVDC) transmission schemes due to their very high efficiency. Accurate models these complex MMC-HVDC systems therefore required research and development. There numerous publications in this area; however tend focus on a particular component within scheme, rather than overall system. A key objective paper is act as guide modelling by giving an overview process...
This paper describes the design strategy for a new Marx generator, based on SiC metal-oxide-semiconductor field-effect transistors (MOSFETs), proposed Kicker magnet applications. As starting point, possible replacement of thyratron tube associated with an existing kicker system, at CERN, is considered. The specifications output pulse are: 40-kV, 3.2-kA, 3-μs flat top duration, 30-ns rise-and fall-time, and 1-Hz repetition rate. A theoretical study generator topology, using 50 stages, each...
A dynamic voltage restorer (DVR) based on the space vector PWM (VSVPWM) algorithm is presented. Phase jump compensation achieved using a software phase-locked loop (SPLL). battery charging control technique DVR itself also described. To validate of DVR, three-phase prototype with potential power rating 10 kVA has been successfully developed. Simulation and experimental results are shown to methods.
The mean life of the positive muon has been measured to a precision 11 ppm using low-energy, pulsed beam stopped in ferromagnetic target, which was surrounded by scintillator detector array. result, tau(micro)=2.197 013(24) micros, is excellent agreement with previous world average. new average 019(21) micros determines Fermi constant G(F)=1.166 371(6)x10(-5) GeV-2 (5 ppm). Additionally, measurement positive-muon lifetime needed determine nucleon pseudoscalar coupling g(P).
This article is devoted to saturable pulse transformers (SPTs), combining the functions of a transformer and magnetic switch. Two nanocrystalline cores are investigated in SPT an inductive energy storage (IES) pulsed power system based on semiconductor opening switch (SOS). The first core has square hysteresis loop (Br/Bsat <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$>$ </tex-math></inline-formula>...
Dynamic voltage restorers (DVRs) are used to protect sensitive loads from the effects of sags on distribution feeder. This paper presents and verifies a novel sag detection technique for control system DVR. In some cases it may be necessary DVR not only detect start end but also determine depth any associated phase shift. The DVR, which is placed in series with load, must able respond quickly if users equipment experience no fluctuations. A problem arises when fast evaluation these...
The Compact Linear Collider (CLIC) study is exploring the scheme for an electron-positron collider with high luminosity and a nominal center-of-mass energy of 3 TeV. CLIC predamping rings damping (DRs) will produce, through synchrotron radiation, ultralow emittance beam bunch charge. To avoid increase, DR kicker systems must provide extremely flat, high-voltage, pulses. specifications extraction kickers DRs are particularly demanding: flattops pulses be ±12.5 kV combined ripple droop not...
An international collaboration plans to measure the lifetime of muon a precision 1 part per million . The "MuLan" experiment will take place at Paul Scherrer Institut (PSI) in Northern Switzerland. MuLan requires fast beam line kicker, which can turn on and off, invoke an artificial time structure continuous has 50.6-MHz microstructure. kicker needs run with standard "on-off cycle" or "Muon Request" mode. consists two pairs deflector plates mechanically series, driven by four modulators....
This paper assesses the impact of commonly used cable modelling techniques on accuracy and simulation speed detailed VSC-HVDC models for a range typical studies. The results show that choice model can have significant employing higher fidelity does not necessarily increase overall model's time. parameters DC-XLPE submarine are also derived. concludes with set recommendations.
Unmanned air and ground vehicles are an integral part of military operations. However, the use robot goes beyond moving platform from point A to B. The operator who is responsible for robots will have a multitude tasks complete; route planning robot, monitoring during mission, interpreting sensor information received by communicating that with others. As result, addition robotics can be considered burden on if not integrated appropriately into system. goal US Army Research Laboratory's Human...
In the framework of design study future linear colliders, Compact Linear Collider (CLIC) aims for electron-positron collisions with high luminosity at a nominal center-of-mass energy 3 TeV. To achieve requirements, predamping rings (PDRs) and damping (DRs) are required: they reduce beam emittance before is accelerated in main linac. Several kicker systems needed to inject extract from PDRs DRs. order both low coupling impedance reasonable broadband matching electrical circuit, striplines...
The electrochemical reduction of microcrystals (C60)x(CTV) (x = 1, 1.5; CTV cyclotriveratrylene) complexes adhered to electrode surfaces in contact with CH3CN (0.10 mol L-1 Bu4NClO4) results initial formation (C60-)x(CTV) which is followed by the liberation reduced fullerene anion from cavity. released then reacts Bu4N+ electrolyte cation form surface-confined (Bu4N)C60 species can turn be further solid-state and/or solution-phase multi-charged anions or oxidized C60(solid). expelled...
Line-type modulators, for example pulse forming lines and networks, which use thyratron switches, are currently used in many power systems at CERN. Solid-state modulators implemented with inductive adder technology could replace based designs applications potentially improve dynamic range, maintainability reliability of the systems. This paper will discuss application an modulator both a future circular collider as upgrade to existing, 45 year old, kicker system.
Abstract The CERN SPS injection kicker magnets (MKP) were developed in the 1970’s, before beam power deposition was considered an issue. There are two types of these SPS: MKP-S (small aperture) and MKP-L (large versions. very lossy from a impedance perspective: this would be issue during operation with higher intensity beams needed future for HL-LHC. Hence, screen has been developed, which is inserted aperture each module. consists silver fingers applied to alumina U-shaped chambers: have...