A5071221984- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- Particle Detector Development and Performance
- Electron and X-Ray Spectroscopy Techniques
- Photocathodes and Microchannel Plates
- Particle physics theoretical and experimental studies
- Magnetic confinement fusion research
- Advancements in Photolithography Techniques
- Gyrotron and Vacuum Electronics Research
- Advanced X-ray Imaging Techniques
- High-Energy Particle Collisions Research
- Distributed and Parallel Computing Systems
- Scientific Computing and Data Management
- Quantum Chromodynamics and Particle Interactions
- Silicon Carbide Semiconductor Technologies
- Astronomy and Astrophysical Research
- Nuclear Physics and Applications
- Laser-Plasma Interactions and Diagnostics
- Plasma Diagnostics and Applications
- Advancements in Semiconductor Devices and Circuit Design
- Astro and Planetary Science
- Gamma-ray bursts and supernovae
- Quantum chaos and dynamical systems
- Laser Design and Applications
Brookhaven College
2019-2024
Brookhaven National Laboratory
2014-2024
SLAC National Accelerator Laboratory
2021-2022
Menlo School
2022
Thomas Jefferson National Accelerator Facility
2021
Cornell University
2021
Lyncean Technologies (United States)
2018
RIKEN BNL Research Center
2016
National Synchrotron Light Source II
2016
Deutsches Elektronen-Synchrotron DESY
1985-2003
The physics, and a design, of Large Hadron Electron Collider (LHeC) are sketched. With high luminosity, 10^{33}cm^{-2}s^{-1}, energy, \sqrt{s}=1.4 TeV, such collider can be built in which 70 GeV electron (positron) beam the LHC tunnel is collision with one hadron beams operates simultaneously LHC. LHeC makes possible deep-inelastic lepton-hadron (ep, eD eA) scattering for momentum transfers Q^2 beyond 10^6 GeV^2 Bjorken x down to 10^{-6}. New sensitivity existence new states matter,...
In the following report we give a survey of linear machine theory. Our investigations are restricted to coasting‐beam betatron motion but coupling is taken into account in general way. The equations for on‐ and off‐momentum particles derived written canonical form. From canonicity it follows that all transfer matrices automatically symplectic. Eigenvector methods introduced study stability behavior. To investigate influence coupling, generalized lattice functions defined perturbation...
In this paper, we explore a method to manipulate low energy electron bunches in space charge dominated regime, and use design linac bunch compressors compress regime. the method, effects instead of avoiding them; i.e., forces generate required chirp ordinary which uses rf accelerating system chirp. We redefine concepts dispersion function beta functions regime guide optimization. Using study (5--22 MeV) compressor produce short ($\ensuremath{\sim}150\text{ }\mathrm{fs}$) small size...
We propose a new method to generate ultrashort x-ray pulses using focused short low energy ($\ensuremath{\sim}20\text{ }\mathrm{MeV}$) electron bunches create slices of electrons from the circulating in synchrotron radiation storage ring. When bunch crosses top high ring bunch, its Coulomb force will kick slice core bunch. The separated slices, when passing through an undulator, radiate at about 160 fs. discuss advantages, challenges, and provide data which confirm feasibility this method.
This design report describes the construction plans for world's first multi-pass SRF ERL. It is a 4-pass recirculating linac that recovers beam's energy by 4 additional, decelerating passes. All beams are returned deceleration in single beam pipe with large-momentum-aperture permanent magnet FFAG optics. Cornell University has been pioneering new class of accelerators, Energy Recovery Linacs (ERLs), characteristic set parameters. Technology prototyped essential any high brightness electron...
We have developed an intrinsic resonance free circular electron accelerator. This lattice could be placed in the existing RHIC tunnel and accelerate electrons from 400 MeV to 18 GeV avoiding all major polarization loss usual such machines.
We have developed a new chromatic compensation scheme for the electron storage ring with two low-beta interaction regions in Electron-Ion Collider. The hybrid consists of modular matching periodic systems and beamlines. first-order chromatically matched solutions are linearly parameterized local linear chromaticities that control higher order beatings. parameterization enables an efficient optimization dynamic aperture. As result, we successfully achieve 1% design criterion momentum aperture ring.
We present a novel method of modifying the proton losses in hadron colliders by generating external tune modulations without interfering with normal luminosity operation. The main application is to reduce loss rates, minimize background rates colliding beam experiments HERA. Another potential control particle diffusion halo affecting core, which might provide useful option for internal fixed target experiment
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...
In ep colliding beam measurements, approximate equality of electron and quark energies is desirable for good detection efficiency. the TeV CM energy regime, synchrotron radiation makes this requirement very expensive to meet using a storage ring electrons. A scheme outlined that ameliorates problem by superconducting linac acceleration. Parameter lists show such an approach may be practical next-generation colliders beyond HERA (Hadron Electron Ring Accelerator). An example 300-GeV with p...
When a low energy electron bunch ($\ensuremath{\sim}20\text{ }\mathrm{MeV}$) crosses from top of high (e.g., 3 GeV) at an angle 45\ifmmode^\circ\else\textdegree\fi{}), the Coulomb force exerted on by will kick very short ($\ensuremath{\sim}150\text{ }\text{ }\mathrm{fs}$) slice core bunch. The can generate ultrashort x-ray pulse. In this paper, we give analytical expressions about angular kicks dependence crossing assuming Gaussian distribution for Applying results to storage ring in NSLS-II...
We report on first experience with colliding electron and proton beams in HERA. In 1992, the year of operation, HERA has delivered some 60(nb)/sup -1/ e-p luminosity to experiments H1 ZEUS. The beam energies amounted 26 GeV 820 GeV. A maximum 2.2/spl times/10/sup 29/ cm/sup -2/ s/sup been achieved by a train nine bunches against bunches. complete collection data is contained reference. could be brought into held collision without problems. lifetime as long 50h. This requires both careful...
The HERA electron-proton collider at Hamburg Germany, designed for collisions of 820 GeV protons with 30 electrons is now in its 6th year operation. It delivers luminosity the colliding beam detectors H1 and ZEUS longitudinally polarized positrons internal target experiment HERMES. operated close to design peak values 1.2/spl times/10(31) cm/sup -2/ sec/sup -1/. While currents still fall short expectations, was increased by focusing beams very tightly interaction points expense using up most...
To facilitate the SAC 2015 Long Range Plan for Nuclear Science: a high-energy high-luminosity polarized Electron-Ion Collider (EIC) as highest priority new facility construction following completion of FRIB. Brookhaven National Laboratory (BNL) is proposing to build high luminosity electron-hadron collider called e-RHIC which incorporates electron synchrotron with existing Relativistic Heavy Ion (RHIC). A low risk conventional technology based design being adopted majority accelerator...
The first eight insertion devices (IDs) at the NSLS-II were commissioned during fall run of 2014. In this paper we discuss commissioning synchrotron radiation protection (SRP) system and beamline frontends (FE) for respective IDs. We describe diagnostics utilized if FE a procedure that was used alignment photon beam from in frontends. Then current status SRP operation