A5006132276- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- Particle physics theoretical and experimental studies
- Muon and positron interactions and applications
- High-Energy Particle Collisions Research
- Nuclear Physics and Applications
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Computational Physics and Python Applications
- Magnetic confinement fusion research
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Gyrotron and Vacuum Electronics Research
- Atomic and Subatomic Physics Research
- Photocathodes and Microchannel Plates
- Radiation Therapy and Dosimetry
- Electron and X-Ray Spectroscopy Techniques
- Plasma Diagnostics and Applications
- Electrostatic Discharge in Electronics
- Physics of Superconductivity and Magnetism
- Noncommutative and Quantum Gravity Theories
- Astrophysics and Cosmic Phenomena
- Smart Agriculture and AI
- Pulsed Power Technology Applications
Huaibei Normal University
2024
Brookhaven National Laboratory
2008-2019
Brookhaven College
1993-2013
RIKEN BNL Research Center
2006-2007
National Library of Luxembourg
2007
Yale University
2003
Boston University
2002
Oak Ridge National Laboratory
2001
We present the final report from a series of precision measurements muon anomalous magnetic moment, ${a}_{\ensuremath{\mu}}=(g\ensuremath{-}2)/2$. The details experimental method, apparatus, data taking, and analysis are summarized. Data obtained at Brookhaven National Laboratory, using nearly equal samples positive negative muons, were used to deduce ${a}_{\ensuremath{\mu}}(\mathrm{\text{Expt}})=11659208.0(5.4)(3.3)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}10}$, where...
The anomalous magnetic moment of the negative muon has been measured to a precision 0.7 ppm (ppm) at Brookhaven Alternating Gradient Synchrotron. This result is based on data collected in 2001, and over an order magnitude more precise than previous measurement for muon. a(mu(-))=11 659 214(8)(3) x 10(-10) (0.7 ppm), where first uncertainty statistical second systematic, consistent with measurements anomaly positive average a(mu)(exp)=11 208(6) (0.5 ppm).
A precise measurement of the anomalous g value, a(mu) = (g-2)/2, for positive muon has been made at Brookhaven Alternating Gradient Synchrotron. The result a(mu+) 11 659 202(14) (6) x 10(-10) (1.3 ppm) is in good agreement with previous measurements and an error one third that combined data. current theoretical value from standard model a(mu)(SM) 159.6(6.7) (0.57 a(mu)(exp) - 43(16) which world average experimental value.
Three independent searches for an electric dipole moment (EDM) of the positive and negative muons have been performed, using spin precession data from muon g-2 storage ring at Brookhaven National Laboratory. Details on experimental apparatus three analyses are presented. Since individual results muon, as well combined result, d=-0.1(0.9)E-19 e-cm, all consistent with zero, we set a new EDM limit, |d| < 1.9E-19 e-cm (95% C.L.). This represents factor 5 improvement over previous best limit EDM.
A higher precision measurement of the anomalous g value, a(mu)=(g-2)/2, for positive muon has been made at Brookhaven Alternating Gradient Synchrotron, based on data collected in year 2000. The result a(mu(+))=11 659 204(7)(5)x10(-10) (0.7 ppm) is good agreement with previous measurements and an error about one-half that combined data. present world average experimental value a(mu)(expt)=11 203(8)x10(-10) ppm).
Received 22 August 2002DOI:https://doi.org/10.1103/PhysRevLett.89.129903©2002 American Physical Society
This document presents BNL's plan for an electron-ion collider, eRHIC, a major new research tool that builds on the existing RHIC facility to advance long-term vision Nuclear Physics discover and understand emergent phenomena of Quantum Chromodynamics (QCD), fundamental theory strong interaction binds atomic nucleus. We describe scientific requirements such facility, following up community-wide 2012 white paper, 'Electron-Ion Collider: Next QCD Frontier', present design concept incorporates...
The muon anomalous magnetic moment has been measured in a new experiment at Brookhaven. Polarized muons were stored superferric ring, and the angular frequency difference, ${\ensuremath{\omega}}_{a}$, between spin precession orbital frequencies was determined by measuring time distribution of high-energy decay positrons. ratio $R$ ${\ensuremath{\omega}}_{a}$ to Larmor free protons, ${\ensuremath{\omega}}_{p}$, storage-ring field measured. We find...
The spin precession frequency of muons stored in the $(g-2)$ storage ring has been analyzed for evidence Lorentz and CPT violation. Two violation signatures were searched for: a nonzero $\Delta\omega_{a}$ (=$\omega_{a}^{\mu^{+}}-\omega_{a}^{\mu^{-}}$); sidereal variation $\omega_{a}^{\mu^{\pm}}$. No significant effect is found, following limits on standard-model extension parameters are obtained: $b_{Z} =-(1.0 \pm 1.1)\times 10^{-23}$ GeV; $(m_{\mu}d_{Z0}+H_{XY}) = (1.8 6.0 \times 10^{-23})$...
A new measurement of the positive muon's anomalous magnetic moment has been made at Brookhaven Alternating Gradient Synchrotron using direct injection polarized muons into superferric storage ring. The angular frequency difference ${\ensuremath{\omega}}_{a}$ between spin precession ${\ensuremath{\omega}}_{s}$ and orbital ${\ensuremath{\omega}}_{c}$ is measured as well free proton NMR ${\ensuremath{\omega}}_{p}.$ These determine...
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...
Errors in delivering a uniformly distributed radiation dose to biological and material samples exposed charged particle beams are significant problem for experimenters. In this paper, we discuss data collected on the uniform beam distributions produced NASA's Space Radiation Laboratory (NSRL) at Brookhaven National (BNL), using method that was conceived theoretically tested experimentally BNL. This [N. Tsoupas et al., Nucl. Sci. Eng. 126, 71 (1997)] of generating plane normal beam's...
In polarized proton collision experiments, it is highly advantageous to flip the spin of each bunch protons during stores reduce systematic errors. Experiments done at energies less than 2 GeV have demonstrated a spin-flip efficiency over 99%. At high energy colliders with Siberian snakes, single magnet flipper does not work because large tune spread and generation multiple, overlapping resonances. A more sophisticated flipper, constructed nine-dipole magnets, was used in BNL Relativistic...
We report progress on the R&D program for electron-cooling of Relativistic Heavy Ion Collider (RHIC). This electron cooler is designed to cool 100 GeV/nucleon at storage energy using 54 MeV electrons. The source will be a superconducting RF photocathode gun. accelerator recovery linac. frequency set 703.75 MHz. maximum bunch 9.38 MHz, with charge 20 nC. has following components: photoinjector and its photocathode, linac cavity, start-to-end beam dynamics magnetized electrons, cooling...
Next generation light-sources, electron coolers, high-power FELs, Compton X-ray sources and many other accelerators were made possible by the emerging technology of high-power, high-brightness beams. In order to get anticipated performance level ampere-class currents, technological barriers are yet be broken. BNL's Collider-Accelerator Department is pursuing some these technologies for its cooling RHIC application, as well a future electron-hadron collider. We will describe work on CW,...
We present the design and parameters of an energy recovery linac (ERL) facility, which is under construction in Collider-Accelerator Department at BNL. This R&D facility has goal demonstrating CW operation ERL with average beam current range 0.1 - 1 ampere very high efficiency recovery. The possibility a future upgrade to two-pass also being considered. heart 5-cell 703.75 MHz super-conducting RF strong Higher Order Mode (HOM) damping. flexible lattice provides test-bed for exploring issues...
The physics interest in a luminosity upgrade of RHIC requires the development cooling-frontier facility. Detailed calculations were made electron cooling stored beams. This has been followed by beam dynamics simulations to establish feasibility creating necessary beam. accelerator will be superconducting Energy Recovery Linac (ERL). An intensive experimental R&D program engages various elements accelerator, as described 24 contributions 2007 PAC.
The future electron-ion collider (eRHIC) at Brookhaven National Laboratory demands a high-current, polarized, bunched electron beam [http://www.bnl.gov/cad/eRhic]. One of the challenges here is to combine beams generated by multiple cathodes so address issue designing and prototyping combiner with high-frequency (700 kHz) rotational magnetic fields. This article presents its design, simulation, details some test results from this unprecedented device.