A5008637420- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- Magnetic confinement fusion research
- Nuclear Physics and Applications
- Gyrotron and Vacuum Electronics Research
- Particle physics theoretical and experimental studies
- Radiation Detection and Scintillator Technologies
- Particle Detector Development and Performance
- Plasma Diagnostics and Applications
- High-Energy Particle Collisions Research
- Atomic and Subatomic Physics Research
- Atomic and Molecular Physics
- Laser-Plasma Interactions and Diagnostics
- Radiation Therapy and Dosimetry
- Distributed and Parallel Computing Systems
- Nuclear physics research studies
- Advanced Data Storage Technologies
- Ion-surface interactions and analysis
- X-ray Spectroscopy and Fluorescence Analysis
- Graphite, nuclear technology, radiation studies
- Solid-state spectroscopy and crystallography
- High-pressure geophysics and materials
- Spectroscopy and Quantum Chemical Studies
- Nuclear reactor physics and engineering
Michigan State University
2013-2025
Shanghai Jiao Tong University
2025
Jiangnan University
2025
State Grid Corporation of China (China)
2024
Hebei General Hospital
2024
North China University of Science and Technology
2024
Brookhaven National Laboratory
2001-2014
Tsinghua University
2009-2014
Facility for Rare Isotope Beams
2012
Institute of Physics
2012
The China Spallation Neutron Source (CSNS) is an accelerator-based multidisciplinary user facility to be constructed in Dongguan, Guangdong, China. CSNS complex consists of H− linear accelerator, a rapid cycling synchrotron accelerating the beam 1.6 GeV, solid-tungsten target station, and instruments for spallation neutron applications. operates at 25 Hz repetition rate with initial design power 120 kW upgradeable 500 kW. Construction project will lay foundation leading national research...
The China Spallation Neutron Source (CSNS) is an accelerator-based facility. accelerator of CSNS consists a low energy linac, Rapid Cycling Synchrotron (RCS) and two beam transport lines. overall physics design described, including the principle, choice main parameters each part accelerators. key problems design, such as loss control, are also discussed. interface between different parts accelerator, well target, introduced.
In 2008, Michigan State University was selected to establish the Facility for Rare Isotope Beams (FRIB). Construction of FRIB accelerator completed in January 2022. Phased commissioning with heavy ion beams started 2017 normal-conducting source and radio-frequency quadrupole. April 2021, full driver linear (linac) commissioned, accelerated energies above 200 MeV/nucleon by 324 superconducting radiofrequency (SRF) resonators operating at 2 K 4 liquid-helium cooling. preparation high-power...
Molecular dynamics is employed to study the nature and magnitude of beam cooling that required in order achieve a crystalline beam. Analysis presented number systems now use, or whose use contemplated, none which has been shown be able state. However, for an adequately strong system produces on average constant angular velocity among particles, state can achieved. In this paper, we present numerical values particular example under typical experimental conditions; these appear achievable practice.
Since 2001, the Relativistic Heavy Ion Collider has experienced electron cloud effects, some of which have limited beam intensity. These include dynamic pressure rises (including instabilities), tune shifts, a reduction instability threshold for bunches crossing transition energy, and possibly incoherent emittance growth. We summarize main observations in operation dedicated experiments as well countermeasures including baking, nonevaporable getter coated warm pipes, solenoids, bunch...
The China Spallation Neutron Source (CSNS) is a large scientific facility with the main purpose of serving multidisciplinary research on material characterization using neutron scattering techniques. accelerator system to provide proton beam 120 kW repetition rate 25 Hz initially (CSNS-I), progressively upgradeable 240 (CSNS-II) and 500 (CSNS-II'). In addition as driving source for spallation target, can be exploited additional functions both in fundamental applied research. expanded...
The low-energy states of a beam charged particles subject to circumferentially varying guiding and focusing forces is studied by first deriving Hamiltonian then using molecular dynamics methods. In an alternating gradient structure, operating below the transition energy (but not in constant ring), lowest state ordered. nature ground depends upon density ring parameters. For very low temperature, crystal remains intact for long time, but as temperature increases it rapidly gains from lattice.
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...
The Facility for Rare Isotope Beams (FRIB) Project has entered the phase of beam commissioning starting from room-temperature front end and superconducting linac segment first 15 cryomodules. With newly commissioned helium refrigeration system supplying 4.5[Formula: see text]K liquid to quarter-wave resonators solenoids, FRIB accelerator team achieved sectional key performance parameters as designed ahead schedule accelerating heavy ion beams above 20[Formula: text]MeV/u energy. Thus,...
During the past five decades, development of accelerator science and technology sustained exponential growth in energy intensity proton beams. Combined with an increasing repetition rate, use high-powered beams has extended from nuclear high-energy physics to modern applications, including spallation-neutron production, kaon factories, transmutation, neutrino-factory drivers, and, future, amplification muon-collider drivers. This paper surveys design operational experience existing proposed...
The Facility for Rare Isotope Beams (FRIB) is a major new scientific user facility under construction in the United States nuclear science research with beams of rare isotopes [1 A. Gade, C. K. Gelbke, and T. Glasmacher, Nucl. Phys. News 24 (2014) 28. [Google Scholar]]. FRIB funded by Department Energy Office Science (DOE-SC) located on campus Michigan State University (MSU), East Lansing, Michigan, USA. will support mission Nuclear Physics DOE-SC. total project cost $730 million scheduled...
Abstract The Facility for Rare Isotope Beams (FRIB), a major nuclear physics facility research with fast, stopped and reaccelerated rare isotope beams, started operation in May 2022. Since then, dozen experiments have been successfully accomplished. Typically, the beams last week or two. Each experiment requires different primary beam species energies. Shortening accelerator fragment separator setup time is critical to meet demands of FRIB Users community. Currently, focus linac reducing...
For high-power heavy ion accelerators, the development of a suitable charge stripper, which can handle intense beams, is essential. This Letter describes first experimental demonstration liquid lithium stripper. A 10-20 μm thick jet flowing at >50 m/s was formed and confirmed stable when bombarded by various while increasing state incoming beams to desired range. proved existing power limitation with conventional strippers be overcome liquid-metal opening completely new possibilities in...
Worldwide several electron cyclotron resonance (ECR) ion sources have been developed and in operation for heavy accelerators using Nb-Ti superconducting magnets. The Versatile ECR source NUclear Science (VENUS) at the Lawrence Berkeley National Lab (LBNL) newly commissioned 28 GHz Facility Rare Isotope Beams (FRIB) were by LBNL. Both adopt a scheme with sextupole magnet inside mirror -type solenoid to confine ions electrons. coils limit all existing operate below ∼9 T 4.2 K. Nb...
Abstract Optimal power flow computation in systems is an important aspect to ensure the smooth operation of grids, but there are some challenges terms computing speed and data privacy protection traditional methods. To address these issues, this study proposes a new method based on SplitNN-DNN. Firstly, we use deep neural network design model that directly maps load voltage results, thereby improving computational efficiency. Second, introduce longitudinal federated learning technique enable...
Primary intracranial malignant melanoma(PIMM) is often difficult to treat in patients without a history of skin melanoma or extensive melanin deposition. Due the rarity disease, current accepted treatment surgical resection, but prognosis still poor. We report case PIMM an adolescent girl with epilepsy as only symptom and atypical imaging findings. was confirmed by further pathological clinical examination. summarize previous cases discuss manifestations, imaging, genetic characteristics...