A5102933770- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- Particle accelerators and beam dynamics
- Magnetic confinement fusion research
- Particle Detector Development and Performance
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Adaptive optics and wavefront sensing
- Gyrotron and Vacuum Electronics Research
- Optical Systems and Laser Technology
- Physics of Superconductivity and Magnetism
- Advanced X-ray Imaging Techniques
- Quantum Chromodynamics and Particle Interactions
- Experimental and Theoretical Physics Studies
- Spacecraft and Cryogenic Technologies
- Radiation Therapy and Dosimetry
- Laser-Plasma Interactions and Diagnostics
- Stellar, planetary, and galactic studies
- Advanced optical system design
- Radiation Detection and Scintillator Technologies
- Crystallography and Radiation Phenomena
- Advanced Chemical Physics Studies
- Photocathodes and Microchannel Plates
- Geographic Information Systems Studies
- Pulsed Power Technology Applications
RadiaBeam Technologies (United States)
2015-2021
SLAC National Accelerator Laboratory
1992-2017
The Langton Grammar School for Boys
2014-2015
Brookhaven National Laboratory
2000-2011
Fermi National Accelerator Laboratory
1987-2011
Institut National de Physique Nucléaire et de Physique des Particules
2011
Centre National de la Recherche Scientifique
2011
Institute of High Energy Physics
2011
High Energy Accelerator Research Organization
2011
Durham University
2006-2010
In 2004, the US DOE established LHC Accelerator Research Program (LARP) with goal of developing a technology base for future upgrades LHC. The focus magnet program, which is collaboration three laboratories, BNL, FNAL and LBNL, on development high gradient quadrupoles using <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$ Nb_3 Sn$</tex> superconductor. Other program components address issues regarding design, radiation-hard materials, long...
The nonlinear dynamics of transverse particle oscillations in the Fermilab Tevatron is studied experimentally and compared with prediction. Accurate measurements various phase-space features are obtained. A theoretically expected metastable state accelerator, particles captured on resonance islands, demonstrated experimentally, stability investigated.
EAGLE is a multi-object 3D spectroscopy instrument currently under design for the 42-metre European Extremely Large Telescope (E-ELT). Precise requirements are still being developed, but it clear that will require (~100 x 100 actuator) adaptive optics correction of ~20 - 60 spectroscopic subfields distributed across ~5 arcminute diameter field view. It very likely LGS be required to provide wavefront sensing with necessary sky coverage. Two alternative implementations considered, one which...
Terahertz accelerators can achieve potential gradients beyond 200 MV/m. Gyrotrons are the only power sources capable of producing megawatt-level, microsecond-long pulses in this frequency range, yet nanosecond-long required for breakdown-free operation. The authors explore possibility using a single GaAs wafer to enable production pulse widths, with rise and fall times that closely track illuminating laser's length. They demonstrate quantify reflective properties laser-induced...
Code division multiple access (CDMA) is a common scheme among all major proposals for third generation cellular standards. The objective of this paper to show the performance benefits open loop (which do not adapt transmission based on channel mobile) and closed transmit diversity methods CDMA. We examine orthogonal (OTD) (an method), adaptive arrays (TXAA) (a method).
▪ Abstract This review discusses the design and initial operation of Relativistic Heavy Ion Collider (RHIC), noting novel features a heavy ion collider that are distinct from conventional hadron colliders. These reflect experimental requirements with variety species over wide energy range, including collisions between ions unequal energies polarized protons. Other unique aspects RHIC include intrabeam scattering, interaction-region error compensation, transition crossing slow ramp rate. The...
We report a new sample transfer system, developed for combined reflection absorption infrared spectroscopy/low-energy electron diffraction/Auger apparatus, which enables single crystal samples to be transferred under ultrahigh vacuum (UHV) conditions while still retaining the facility varying and monitoring temperature. The important feature of this design is that direct temperature measurement at not sacrificed in order gain transferability. This advance will allow moved from preparation...
After the LHC operates for several years at nominal parameters, it will be necessary to upgrade higher luminosity. Replacing low-/spl beta/ insertions with a performance design based on advanced superconducting magnets is one of most straightforward steps in this direction. Preliminary studies show that, magnet technology that expected developed by early next decade, factor 2 5 reduction /spl beta/* could achieved new insertions, as part an aimed 10 luminosity increase. In paper we survey...
The dynamics of a metastable beam particles ``injected'' into artificially excited resonance islands in the Fermilab Tevatron is studied. Evolution captured distribution measured by an externally detectable coherent signal. Dynamical partitions observed control space amplitude and tune focusing modulation are consistent with equivalent mode ensemble driven gravity pendula. model's single parameter, island ${\mathit{Q}}_{\mathit{I}}$ small oscillations, inferred as central frequency resonant...
The problem of bacterial contamination vegetable seed sprouts produced for human consumption is reviewedbriefly. potential controlling pathogens on alfalfa used in the production by dielectricheating was studied experimental exposure artificially contaminated with Salmonella, Escherichia coliO157:H7, and Listeria monocytogenes to radiofrequency (RF) dielectric heating treatments at 39 MHz different electricfield intensities varying times exposure. Moisture content final temperatures...
A neutrino oscillation experiment using the J-PARC SO GeV 0.75 MW proton beam is planned as a successor to K2K project currently being operated at KEK.A superconducting magnet system required for arc section of primary line be within space available site.A with 28 combined function magnets proposed simplify and optimize cost.The fields are 2.6 T dipole 19 T/m quadrupole.The also have large aperture, 173.4 mm diameter, accommodate emittance.The will protected by cold diodes cooled forced flow...
Superconducting combined function magnets will be utilized for the 50 GeV, 750 kW proton beam line J-PARC neutrino experiment. The magnet is designed to provide a dipole field of 2.6 T with quadrupole 19 T/m in coil aperture 173.4 mm at nominal current 7345 A. Two full-scale prototype verify performance were successfully developed. first experienced no training quench during excitation test and good quality was confirmed.
This paper presents a summary of the design, construction and test results common coil dipole DCC017 made using ldquoreact & windrdquo Nb <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> Sn technology. It reached computed short sample field 10.2 T at 10.8 kA after number quenches. In order to build high magnets with brittle pre-reacted superconductors one must develop magnet designs, tooling techniques that keep conductor degradation due...
The Langton Ultimate Cosmic ray Intensity Detector (LUCID) experiment is a satellite-based device that will use five Timepix hybrid silicon pixel detectors to make measurements of the radiation environment at an altitude approximately 635 km, i.e. in Low Earth Orbit (LEO). due launch aboard Surrey Satellite Technology Limited's (SSTL's) TechDemoSat-1 2014. detectors, developed by Medipix Collaboration, are arranged form sides cube enclosed 0.7 mm thick aluminium "dome", and be operated...
We present results on the commissioning of two-module RadiaBeam / SLAC dechirper system at LCLS. This is first installation and measurement a corrugated high energy (4.4 - 13.3 GeV), short pulses (< 200 fs) while observing its effect an operational FEL. Both transverse longitudinal wakefields allow more flexible electron beam tailoring. verify that, for single module given gap, strength wake axis dipole near agree well with theoretical values. Using direct phase space mapping X-ray FEL...
Extremely high radiation, levels with accumulated doses comparable to those in nuclear reactors than accelerators, and very heat loads (/spl sim/15 kW) make the quadrupole magnets fragment separator one of most challenging elements proposed Rare Isotope Accelerator (RIA). Removing large loads, protecting superconducting coils against quenching, long term survivability magnet components, particular, insulation that can retain its functionality such a harsh environment, are major challenges...
The Langton Ultimate Cosmic ray Intensity Detector (LUCID) experiment is a satellite-based device that uses five Timepix hybrid silicon pixel detectors to make measurements of the radiation environment at an altitude approximately 630 km, i.e. in Low Earth Orbit (LEO) . launched aboard Surrey Satellite Technology Limited's (SSTL's) TechDemoSat-1 on Tuesday 8th July 2014. detectors, developed by Medipix2 Collaboration, are arranged form sides cube enclosed 0.7 mm thick aluminium covering, and...
The J-PARC Neutrino Experiment, the construction of which starts in JFY 2004, will use a superconducting magnet system for its primary proton beam line. system, bends 50 GeV 0.75 MW by about 80 degrees, consists 28 combined function magnets. magnets utilize single layer left/right asymmetric coils that generate dipole field 2.6 T and quadrupole 18.6 T/m with operation current 7.35 kA. also contains few conduction cooled corrector serve as vertical horizontal steering All are designed to...
The RadiaBeam/SLAC dechirper, a structure consisting of pairs flat, metallic, corrugated plates, has been installed just upstream the undulators in Linac Coherent Light Source (LCLS). As with beam passing between plates on axis, longitudinal wakefields are induced that can remove unwanted energy chirp beam. However, off strong transverse wakes also induced. This mode operation already used for production intense, multicolor photon beams using fresh-slice technique, and is being to develop...
High temperature superconductors (HTS) have the potential to change design and operation of future particle accelerators beginning with high performance interaction regions. HTS offers two distinct advantages over conventional low (LTS)-they retain a large fraction their current carrying capacity (a) at fields (b) elevated temperatures. The Superconducting Magnet Division Brookhaven National Laboratory (BNL) has embarked on new R & D program for developing technology needed building...