A5041555685- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- Advanced X-ray Imaging Techniques
- Gyrotron and Vacuum Electronics Research
- Nuclear Physics and Applications
- Laser-Plasma Interactions and Diagnostics
- Particle Detector Development and Performance
- Crystallography and Radiation Phenomena
- Advanced Electron Microscopy Techniques and Applications
- Distributed and Parallel Computing Systems
- Engineering Applied Research
- Magnetic confinement fusion research
- Scientific Research and Discoveries
- Laser-Matter Interactions and Applications
- Electromagnetic Compatibility and Measurements
- X-ray Spectroscopy and Fluorescence Analysis
- Photocathodes and Microchannel Plates
- Advanced Data Storage Technologies
- Simulation and Modeling Applications
- Advanced Data Compression Techniques
- Nuclear reactor physics and engineering
- Neural Networks and Reservoir Computing
- Electromagnetic Launch and Propulsion Technology
- Particle physics theoretical and experimental studies
Brookhaven National Laboratory
2007-2018
Lyncean Technologies (United States)
2018
Xiamen University
2017
National Synchrotron Light Source II
2016
Jiangnan University
2015
RIKEN BNL Research Center
2007
Argonne National Laboratory
2005-2006
Chinese Academy of Sciences
2006
Shanghai Institute of Applied Physics
2006
Indiana University Bloomington
2002
Dynamic aperture (DA) is one of the key nonlinear properties for a storage ring. Although there have been both analytical and numerical methods to find aperture, reverse problem how optimize it still challenging problem. A general flexible way optimizing DA highly demanded in accelerator design operation. In this paper, we discuss use multiobjective optimization DA. First consider using objective functions based only on tracking results. Data mining these results demonstrated correlation...
The duration of the x-ray pulse generated at a synchrotron light source is typically tens picoseconds. Shorter pulses are highly desired by users. In electron storage rings, vertical beam size usually orders magnitude less than bunch length due to radiation damping; therefore, shorter can be obtained slitting vertically tilted bunch. Zholents proposed tilting using rf deflection. We found that bunches also dipole magnet kick. A tilt developed after kick in presence nonzero chromaticity. was...
We show that X-ray pulses one order of magnitude shorter than the electron bunch length can be obtained through synchrobetatron coupling. A 6-ps rms visible light pulse from a 30-ps was observed using streak camera. Theory, simulation, and experimental results are presented.
National Synchrotron Light Source II (NSLS-II) is a new third-generation storage ring light source at Brookhaven Laboratory. The design calls for small horizontal emittance (<1 nm-rad) and diffraction-limited vertical 12 keV (8 pm-rad). Achieving low value of the beam size will enable novel user experiments with nm-range spatial meV-energy resolution. high-brightness NSLS-II lattice has been realized by implementing 30-cell double bend achromatic cells producing 2 nm rad then halving it...
The National Synchrotron Light Source II (NSLS-II) is a state of the art 3 GeV third generation light source at Brookhaven Laboratory. During spring/ summer 2014, storage ring was commissioned up to 50 mA without insertion devices. In fall we began commissioning project beamlines, which included seven devices on six ID ports. Beamlines IXS, HXN, CSX-1, CSX-2, CHX, SRX, and XPD-1 consist elliptically polarized undulator (EPU), damping wigglers (DW) in-vacuum undulators (IVU) covering from VUV...
There is growing interest within the user community to utilize pulsed nature of synchrotron radiation from storage ring sources. Conventional third-generation light sources can provide pulses on order 100 ps but typically cannot about 1 that some users now require advance their research programs. However, it was recently proposed by A. Zholents et al. use rf orbit deflection generate sub-ps x-ray [1]. In this scheme, two crab cavities are used deliver a longitudinally dependent vertical kick...
We present the conceptual design of NSLS-II injection system [1, 2]. The consists a low-energy linac, booster and transport lines. review two different configurations; located in storage ring tunnel housed separate building. briefly discuss main parameters layout components.
Nowadays, Android devices become more and popular, which attracts the attention of forensics workers. As have a perfect security mechanism, root privileges are required to obtain electronic evidence effectively. The existing methods obtaining in mainly based on third-party tool. Although widely used, drawback this method tools is uncontrollable. In article, temporary presented. It vulnerabilities system. Moreover, applied acquisition physical images for devices. This utilizes an appropriate...
The National Synchrotron Light Source II at Brookhaven Lab is a third-generation synchrotron radiation facility that has been commissioned in 2014. based on 3 GeV electron storage ring, which will circulate 500 mA of beam current 1 nm rad horizontal emittance. ring 792 meters circumference and accommodate more than 60 beamlines the final built-out. beamline sources range from insertion-devices located straight sections, bending magnets or three-pole-wigglers configured multiple branches....
We show that the quadrupole-mode transfer function (QTF) is a powerful nondestructive tool to measure properties of dynamical systems. In particular, we discuss feasibility using QTF betatron tunes and beam emittances with beam-position monitor system. The can also be used compensate optical mismatch during injection process. However, it less effective than rf dipole method in overcoming intrinsic spin resonances for polarized acceleration.
We present experimental studies of synchro-betatron-coupled electron beam motion in the Advanced Photon Source (APS) storage ring. used a vertical kicker to start motion. When chromaticity is nonzero, electrons with different initial synchrotron phases have slightly betatron frequencies from synchronous particle, resulting dramatic progression bunch-shape distortion. Depending on and time following kick, images ranging simple tilt bunch more complicated twists bends are seen visible light...
NSLS-II is a third generation light source under design. The beam stability control has been taken into consideration. In this paper we looked the longitudinal tolerances. We found that timing and infrared beamlines are most susceptible to noise. rest of affected because dispersion momentum dependent vertical divergence effects. set tolerance Deltap/p <5 x 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-5</sup> on energy oscillation amplitude.
RF system requirements are derived from machine parameters and beam stability specifications. The conceptual design of the for NSLS-II to meet these is presented, consisting 500 MHz superconducting main cavities, 1500 pasive SCRF harmonic cavities bunch lengthening, power cryogenic systems..
The National Synchrotron Light Source II (NSLS-II) is a state of the art 3 GeV third generation light source at Brookhaven Laboratory. In spring 2014, storage ring was commissioning up to 50 mA without insertion device. fall, project beamlines, includes seven devices on six ID ports were commissioned within two and half months. These beamlines consist IXS, HXN, CSX-1, CSX-2, CHX, SRX, XPD-1, from radiation sources elliptically polarizing undulator (EPU), damping wiggler (DW) in vacuum (IVU)...