A5078595963- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Particle Detector Development and Performance
- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Heat Transfer and Optimization
- Superconducting Materials and Applications
- Gyrotron and Vacuum Electronics Research
- Refrigeration and Air Conditioning Technologies
- Energy Harvesting in Wireless Networks
- Electron and X-Ray Spectroscopy Techniques
- Plasma Diagnostics and Applications
- Dark Matter and Cosmic Phenomena
- Laser Design and Applications
- Advanced Thermodynamic Systems and Engines
- Photocathodes and Microchannel Plates
- solar cell performance optimization
- Meteorological Phenomena and Simulations
- CCD and CMOS Imaging Sensors
- Solar Thermal and Photovoltaic Systems
- Cold Atom Physics and Bose-Einstein Condensates
- Heat Transfer and Boiling Studies
- Advanced Electron Microscopy Techniques and Applications
- Pulsars and Gravitational Waves Research
- Quantum and Classical Electrodynamics
Brookhaven National Laboratory
2022-2024
Brookhaven College
2023
Cornell University
2017-2021
William & Mary
2015
Williams (United States)
2015
The MINERvA collaboration operated a scaled-down replica of thesolid scintillator tracking and sampling calorimeter regions the detector in hadron test beam at Fermilab Test Beam Facility. This paper reports measurements with samples protons, pions, electrons from 0.35 to 2.0 GeV/c momentum. calorimetric response is obtained these data. A measurement parameter Birks׳ law an estimate efficiency are extracted proton sample. Overall data well described by Geant4-based Monte Carlo simulation...
Particle storage rings are a rich application domain for online optimization algorithms. The Cornell Electron Storage Ring (CESR) has hundreds of independently powered magnets, making it high-dimensional test-problem algorithmic tuning. We investigate algorithms that restrict the search space to small number linear combinations parameters ("knobs") which contain most effect on our chosen objective (the vertical emittance), thus enabling efficient report experimental tests at CESR use...
The Cornell Electron-positron Storage Ring (CESR) has been converted from a High Energy Physics electron-positron collider to operate as dedicated synchrotron light source for the Synchrotron Source (CHESS) and conduct accelerator physics research test accelerator, capable of studying topics relevant future damping rings, colliders sources. Some specific that were targeted initial phase operation storage ring in this mode, labeled CesrTA (CESR Test Accelerator), included 1) tuning techniques...
A proposed experiment to demonstrate optical stochastic cooling (OSC) in the Cornell Electron Storage Ring (CESR) based on an arc-bypass design is presented. This arc bypass provides significantly longer delay than dog-leg style chicane, opening up possibility of a multipass or staged amplifier that can achieve gains required for effective hadron heavy ions. Beyond introducing bypass, this paper we study stability requirements dipoles comprising it and investigate use feedback system relax...
We report here the first experimental result for anisotropy of one-way maximum attainable speed electron, $\mathrm{\ensuremath{\Delta}}{\stackrel{\ensuremath{\rightarrow}}{c}}_{1,e}$, obtained via study a sidereal time dependence difference between momenta counterrotating electron and positron beams in Cornell Electron Storage Ring at University. At 95% confidence, an upper limit component $\mathrm{\ensuremath{\Delta}}{\stackrel{\ensuremath{\rightarrow}}{c}}_{1,e}/c$ perpendicular to Earth's...
Coherent electron cooling is a novel method to cool dense hadron beams on timescales of few hours. This uses copropagating beam electrons pick up the density fluctuations within in one straight section and then provide corrective energy kicks hadrons downstream straight, beam. Microbunched an extension this idea which induces microbunching instability as it travels between two straights, amplifying signal. However, initial noise bunch will also be amplified, providing random tend increase...
Coherent electron cooling is a novel method to cool dense hadron beams on timescales of few hours. This uses copropagating beam electrons pick up the density fluctuations within in one straight section and then provides corrective energy kicks hadrons downstream straight, beam. Microbunched an extension this idea, which induces microbunching instability as it travels between two straights, amplifying signal. However, initial noise bunch will also be amplified, providing random tend increase...
The MINERvA collaboration operated a scaled-down replica of the solid scintillator tracking and sampling calorimeter regions detector in hadron test beam at Fermilab Test Beam Facility. This article reports measurements with samples protons, pions, electrons from 0.35 to 2.0 GeV/c momentum. calorimetric response are obtained these data. A measurement parameter Birks' law an estimate efficiency extracted proton sample. Overall data well described by Geant4-based Monte Carlo simulation...
We present analytic cooling and diffusion rates for a simplified model of coherent electron (CEC), based on proton energy kick at each turn. This also allows to estimate analytically the rms value beam density fluctuations in "kicker" section. Having such expressions should allow better understanding CEC mechanism, quicker analysis optimization main system parameters. Our is applicable any amplification as long wake (kick) function available.
In preparation for a demonstration of optical stochastic cooling in Cornell Electron Storage Ring, we have developed particle tracking simulation to study the relevant beam dynamics. Optical radiation emitted pickup undulator gives momentum kick that same kicker undulator. The optics electron bypass from couples betatron amplitude and offset path length so reduces emittance spread. Nearby electrons contribute an incoherent noise. Layout line is presented accommodates with range transverse...
Coherent electron cooling is a promising technique to cool high-intensity hadron bunches by imprinting the noise in beam on of electrons, amplifying density modulations, and using them apply kicks hadrons. The typical size for these perturbations can be $\ensuremath{\mu}\mathrm{m}$ scale, allowing us extend reach classical stochastic several orders magnitude. However, it crucial ensure that beams are longitudinally aligned within this same scale. In order provide fast feedback process, we...
In order to minimize the emittance at Cornell Electron Storage Ring (CESR), we measure and correct orbit, dispersion, transverse coupling of beam. However, this method is limited by finite measurement resolution so a new procedure must be used further reduce due dispersion. achieve this, use based upon theory sloppy models. We model accelerator create Hessian matrix which encodes effects various corrector magnets on vertical emittance. A singular value decomposition yields magnet...
In order to minimize the emittance at Cornell Electron Storage Ring (CESR), we measure and correct orbit, dispersion, transverse coupling of beam. However, this method is limited by finite measurement resolution so a new procedure must be used further reduce due dispersion. achieve this, use based upon theory sloppy models. We model accelerator create Hessian matrix which encodes effects various corrector magnets on vertical emittance. A singular value decomposition yields magnet...