A5073921258- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- Magnetic confinement fusion research
- Nuclear Physics and Applications
- Plasma Diagnostics and Applications
- Particle Detector Development and Performance
- Gyrotron and Vacuum Electronics Research
- Radiation Therapy and Dosimetry
- Particle physics theoretical and experimental studies
- Atomic and Molecular Physics
- Atomic and Subatomic Physics Research
- Electron and X-Ray Spectroscopy Techniques
- Ion-surface interactions and analysis
- X-ray Spectroscopy and Fluorescence Analysis
- Photocathodes and Microchannel Plates
- Boron Compounds in Chemistry
- Solar and Space Plasma Dynamics
- Neutrino Physics Research
- Graphite, nuclear technology, radiation studies
- High-Energy Particle Collisions Research
- Fusion materials and technologies
- Pulsed Power Technology Applications
- Experimental and Theoretical Physics Studies
- Mass Spectrometry Techniques and Applications
Brookhaven National Laboratory
2015-2024
Massachusetts Institute of Technology
2018-2023
Thomas Jefferson National Accelerator Facility
2018-2023
RIKEN BNL Research Center
2001-2007
Spallation Neutron Source
2006
Brookhaven College
1997-2004
University of Houston
1989-2003
Oak Ridge National Laboratory
2003
South Dakota School of Mines and Technology
1985-2003
University of Pennsylvania
1985-2003
A new experiment is described to detect a permanent electric dipole moment of the proton with sensitivity $10^{-29}e\cdot$cm by using polarized "magic" momentum $0.7$~GeV/c protons in an all-electric storage ring. Systematic errors relevant are discussed and techniques address them presented. The measurement sensitive physics beyond Standard Model at scale 3000~TeV.
Static electric dipole moments of nondegenerate systems probe mass scales for physics beyond the Standard Model well those reached directly at high energy colliders. Discrimination between different models, however, requires complementary searches in atomic-molecular-and-optical, nuclear and particle physics. In this report, we discuss current status prospects near future a compelling suite such experiments, along with developments needed encompassing theoretical framework.
Abstract The Extended Electron Beam Ion Source (EEBIS) has been installed and commissioned at Brookhaven National Laboratory (BNL) hadron accelerator complex in the spring of 2023. EEBIS replaced its predecessor, RhicEBIS, which provided ions for BNL facilities over a decade since 2009. motivations source upgrade are to provide higher intensities Au 32+ ion beam Relativistic Heavy Collider (RHIC) an intense polarized 3 He 2+ future (EIC) BNL. is will continue be primary variety different...
This paper summarizes the low-loss design for Spallation Neutron Source accumulator ring [``Spallation Design Manual'' (unpublished)]. A hybrid lattice consisting of FODO arcs and doublet straights provides optimum matching flexibility injection collimation. For this lattice, optimization focuses on six goals: a space-charge tune shift low enough (below 0.15) to avoid strong resonances, adequate transverse momentum acceptance efficient beam collimation, optimized desired target shape minimal...
As part of a new heavy ion preinjector that will supply beams for the Relativistic Heavy Ion Collider and National Aeronautics Space Administration Radiation Laboratory, construction electron beam source (EBIS) is now being completed. This source, based on successful prototype Brookhaven Laboratory Test EBIS, designed to produce milliampere level currents all species, with q/m=(1/6)−(1/2). Among major components this are 5 T, 2-m-long, 204 mm diameter warm bore superconducting solenoid, an...
RHIC EBIS will be used for producing multicharged ions from helium to uranium using primary various external ion sources. The is followed by an RFQ and short linac, forming the new preinjector which produce beams physics at NASA Space Radiation Laboratory, design of based on BNL Test EBIS, was a successful 10A electron current prototype. Improvements have been made in increase capacity trap, repetition frequency operation, current, acceptance injected ions, improve vacuum conditions...
A new optically pumped polarized H− ion source (OPPIS) was developed for the RHIC polarization program and successfully used first beam commissioning at RHIC. The OPPIS produces in excess of 1.0 mA current about 80% polarization. An ECR primary proton development a 29 GHz microwave power supply are described. type sodium-jet ionizer cell is biased to −32 kV produce 35 keV ready injection RFQ. Higher higher were also obtained with jet-cell comparison an old oven-type cell.
A novel polarization technique had been successfully implemented for the Relativistic Heavy Ion Collider (RHIC) polarized H− ion source upgrade to higher intensity and polarization. In this technique, a proton beam inside high magnetic field solenoid is produced by ionization of atomic hydrogen (from external source) in He-gaseous ionizer cell. Further process electron capture from optically pumped Rb vapor. The use high-brightness primary large cross sections charge-exchange resulted...
Projections of charged particle beam current density (profiles) are frequently used as a measure position and size. In conventional practice only two projections, usually horizontal vertical, measured. This puts severe limit on the detail information that can be achieved. A third projection provides significant improvement. The Algebraic Reconstruction Technique (ART) uses three or more projections to reconstruct 3-dimensional profiles. At 200 MeV H/sup -/ linac, we have this technique...
We describe a mechanism using clearing electrodes and solenoids to remove the electron cloud in Spallation Neutron Source's accumulator ring. Simulation indicates that strong multipacting could happen at median fields. A similar phenomenon was reported an experimental study Los Alamos Laboratory's Proton Storage Ring. weak solenoid is proven be good remedy for suppressing by confining electrons near chamber wall's surfaces. investigated both solenoids.
Increasing the current density of electron beam in ion trap Electron Beam Ion Source (EBIS) BNL's Relativistic Heavy Collider facility would confer several essential benefits. They include increasing ions’ charge states, and therefore, energy out Booster for NASA applications, reducing influx residual ions trap, lowering average power load on collector, possibly also emittance extracted beam. Here, we discuss our findings from a computer simulation an gun with electrostatic compression up to...
We describe a proposal to search for an intrinsic electric dipole moment (EDM) of the proton with sensitivity \targetsens, based on vertical rotation polarization stored beam. The New Physics reach is order $10^~3$TeV mass scale. Observation EDM provides best probe CP-violation in Higgs sector, at level that may be inaccessible electron-EDM experiments. improvement $\theta_{QCD}$, parameter crucial axion and dark matter physics, about three orders magnitude.
The AGS-RHIC pre-injector complex includes a high-intensity (magnetron type) H− ion source, an Optically Pumped Polarized Ion Source (OPPIS); 750 keV RFQ and 200 MeV Linac. In this paper we will focus on the recent Linac upgrade with three sources: two magnetron sources OPPIS. We also present development to higher duty factor reliability. Both produce 120-130 mA current (maximum 150 mA, 600-1000 us pulse duration, 7 Hz repetition rate). LEBT improvement resulted in beam intensity increase...
The Oak Ridge Spallation Neutron Source comprises a 1 GeV, 1.5 MW linear accelerator followed by an accumulator ring and liquid mercury target. To manage the beam loss caused ${H}^{0}$ excited states created during ${H}^{\ensuremath{-}}$ charge-exchange injection into ring, stripper foil is located inside one of chicane dipoles. This has some interesting consequences that were not fully appreciated until power reached about 840 kW. One consequence was sudden failure system due to convoy...
Electron diode guns, which have strongly varying magnetic or electric fields in a cathode-anode gap, were investigated order to generate laminar electron beams with high current density using magnetically immersed guns. By creating radial field gap of the gun, it was demonstrated that optical properties gun can be significantly altered, allows generation laminar, high-current beam relatively low on cathode. The compression achieved by this method is important for producing density. A similar...
The results of investigation and comparison a series transverse phase space painting schemes for the injection SNS accumulator ring is reported. In this computer simulation study, focus on creation closed orbit bumps that give desired distributions at target. Space charge effects such as tune shift, emittance growth beam losses are considered. pseudo end-to-end simulations from to target through Ring Target Beam Transfer (RTBT) system presented discussed.