A5064556567- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- Magnetic confinement fusion research
- Gyrotron and Vacuum Electronics Research
- Particle Detector Development and Performance
- Magnetic Properties and Applications
- Nuclear Physics and Applications
- Radiation Detection and Scintillator Technologies
- Electromagnetic Launch and Propulsion Technology
- Magnetic properties of thin films
- Particle physics theoretical and experimental studies
- Parallel Computing and Optimization Techniques
- Atomic and Molecular Physics
- Ultrasonics and Acoustic Wave Propagation
- Numerical methods for differential equations
- Lightning and Electromagnetic Phenomena
- Radiation Therapy and Dosimetry
- Distributed and Parallel Computing Systems
- Electromagnetic Simulation and Numerical Methods
- Geophysics and Sensor Technology
- Dark Matter and Cosmic Phenomena
- Mathematics, Computing, and Information Processing
- High voltage insulation and dielectric phenomena
- Advanced Data Storage Technologies
Fermi National Accelerator Laboratory
2014-2024
United States Department of Energy
2015
Fermi Research Alliance
2002-2006
SLAC National Accelerator Laboratory
2002
KMS Fusion (United States)
1989
McGill University
1985
Hydro-Québec
1981
The MARS code is under continuous development and has recently undergone substantial improvements that further increase its reliability predictive power in numerous shielding, accelerator, detector space applications. major developments new features of the MARS15 (2004) version described this paper concern an extended list elementary particles arbitrary heavy ions their interaction cross sections, inclusive exclusive nuclear event generators, module for modelling particle electromagnetic...
We have made a direct determination of the diffusion rates in stored, coasting antiproton beam by observing decay associated with echoes longitudinal plane. The echoes, similar to those observed other fields physics, are generated sequential impulse excitation at harmonics revolution frequency. echo envelope follows characteristic response which, however, can be modified presence even very weak scattering process, permitting sensitive rate beam.
The anomalous magnetic moment of the muon is one most precisely measured quantities in experimental particle physics. Its latest measurement at Brookhaven National Laboratory deviates from Standard Model expectation by approximately 3.5 standard deviations. goal new experiment, E989, now under construction Fermilab, a fourfold improvement precision. Here, we discuss details future and its current status.
The Project X Injector Experiment (PXIE), a test bed for the front end, will be completed at Fermilab FY12-16. One of challenging goals PXIE is demonstration capability to form 1 mA H- beam with an arbitrary selected bunch pattern from initially 5 162.5 MHz CW train. selection made in Medium Energy Beam Transport (MEBT) 2.1 MeV by diverting undesired bunches absorber. This paper presents MEBT scheme and describes development its elements, including kickers
To improve the luminosity of Fermilab Tevatron proton-antiproton collider in post Main-Injector era, most straightforward approach is to increase intensity antiproton beam. A number schemes based on fixed energy storage rings have been suggested accomplish this goal. ring can be used accumulate freshly produced antiprotons and/or recycle at end a store. For reasons cost and reliability, permanent magnets are strong contenders for magnet assemblies, with ceramic ferrite material choice. Since...
Permanent magnets built using strontium ferrite bricks have been tested for stability against demagnetization. Ten test dipoles were to monitor behavior under a variety of stressing conditions, including irradiation, mechanical shock, extreme thermal excursions, and long term magnetization stability. The geometrically similar to, but much shorter than, the 8 GeV transfer line at FNAL. No loss was observed exposed proton beam, magnet several Gigarads Co/sup 60/ gamma radiation suffered no...
Estimates indicate that the electron cloud effect could be a limiting factor for Main Injector intensity upgrades, with or without presence of new 8 GeV superconducting Linac injector. The may turn out to an issue operational relevance other parts Fermilab accelerator complex as well. To improve our understanding situation, two sections specially made vacuum test pipe outfitted detection ANL provided retarding field analyzers (RFAs) were installed in Tevatron and Injector. In this report we...
The Main Injector project at Fermilab requires a dipole with good field quality from 0.1 T to 1.73 ramps full up 2.4 T/s over an aperture of 10 cm*5 cm. Operation this magnet for the variety purposes proposed results in design low inductance, large copper cross section, and uniformity sufficient high-intensity injection efficient slow resonant extraction. resulting is presented, along measurement prototype emphasizing uniformity.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML"...
The design of permanent magnets for use in the Fermilab Main Injector "Recycler" ring is described. are a hybrid with field shape determined from accurately machined pole tips and driven by strontium ferrite blocks. choice magnetic material discussed. A temperature compensation scheme has been demonstrated which uses low Curie-temperature alloy to null out intrinsic coefficient ferrite. 1.2 m prototype have constructed achieve goal dB/B<10-4 over an aperture 3.5"(h)/spl times/2"(v).
Production of positron emitting radioactive isotopes /sup 18/F, 15/O, 11/C and 13/N for use in emission tomography is important medical imaging. The present state the production art to cyclotrons accelerate deuterons an energy range 10's MeV impinge on appropriate targets. An alternative approach a cascade RFQ's 3/He ions 10-MeV as bombarding particles. Due lower background radiation, accelerator requires far less shielding than cyclotron, addition other advantages. This paper will discuss...
The 8 GeV transfer line feeding protons into the new Fermilab Main Injector has been built using strontium ferrite permanent magnets. This article addresses design and manufacture of 67 combined function magnets; horizontal vertical bend dipoles quadrupoles were also built. magnets with a mean integrated strength at midaperture 0.56953 T-m (central field nominally 0.15 T), gradient 3.23% per cm relative to dipole (nominal gradient=0.48 T/m). Thermal compensation these bricks was effected by...
During the course of last decade, traveling wave accelerating structures for a future Linear Collider have been object intense R&D efforts. An important problem is efficient computation long range wakefield with ability to include small alignment and tuning errors. To that end, SLAC has developed an RF circuit model demonstrated reproduce experimentally measured wakefields. The involves repeated solution deterministic system equations over frequencies. By taking maximum advantage...
Fermilab is working on the design of an 8 GeV superconducting RF H <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-</sup> linac called Proton Driver. The energy beam will be order magnitude higher than existing ones. This brings up a number technical challenges to transport and injection ions. paper focus subjects stripping losses (including by blackbody radiation, field residual gas) carbon foil efficiency, along with brief discussion other...
The upcoming Proton Improvement Plan-II (PIP-II), designated for enhancements to the Fermilab accelerator complex, features a Beam Transfer Line (BTL) that channels beam from linac exit booster.In absence of longitudinal focusing beyond superconducting linac, experiences an elevated momentum spread, primarily due nonlinear space-charge forces, surpassing allowable limit 2.1e-4.This study presents detailed examination space-charge-induced spread and outlines mitigative strategies.The...
As part of an effort to better understand potential losses and emittance blow-up in the Booster, we have been conducting full cycle 6D simulations using code PyOrbit.The simulation include space charge, wall impedance transition crossing.We discuss our experience with present representative results for possible operational scenarios.We focus on longitudinal blowup.
The Preisach hysteresis model is implemented into the finite element method. It demonstrated that this well suited to a scalar potential representation of field, fact has not been fully appreciated so far. Although clearly eliminates possibility dealing exactly with problems involving eddy currents in hysteretic subregions, computation magnetic field when both and nonmagnetic current-carrying subregions are present simultaneously can be handled by adopting hybrid formulation. This allows...
Hybrid permanent magnet quadrupoles for specialized portions of the 8 GeV transfer line from Fermilab Booster to new Main Injector have been built, tested and installed. These magnets use a 0.635 m long iron shell provide an integrated gradient 1.48 T-m/m with pole tip radius 0.0416 m. length 0.508 Bricks 0.0254 thick strontium ferrite supply flux back produce desired 2.91 T/m gradient. For temperature compensation, Ni-Fe alloy strips are interspersed between bricks subtract in dependent...
We report the current status and our plans for completion of CHEF, an interactive application performing optics calculations in accelerator physics. CHEF uses high level graphical user interfaces to facilitate exploitation lower tools incorporated into a hierarchy C++ class libraries, making them usable by those not familiar with programming.