A5068493296- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Superconducting Materials and Applications
- Particle Detector Development and Performance
- Electron and X-Ray Spectroscopy Techniques
- Magnetic confinement fusion research
- Advanced Electron Microscopy Techniques and Applications
- Advanced X-ray Imaging Techniques
- Nuclear Physics and Applications
- Gyrotron and Vacuum Electronics Research
- Laser-Plasma Interactions and Diagnostics
- Integrated Circuits and Semiconductor Failure Analysis
- Radiation Detection and Scintillator Technologies
- Photocathodes and Microchannel Plates
- Atomic and Subatomic Physics Research
- Advancements in Photolithography Techniques
- Radiation Therapy and Dosimetry
- Crystallography and Radiation Phenomena
- Quantum Information and Cryptography
- Optical Systems and Laser Technology
- Dark Matter and Cosmic Phenomena
- Laser-Matter Interactions and Applications
Fermi National Accelerator Laboratory
2015-2024
Columbia University
2024
Enrico Fermi Center for Study and Research
2024
University of Chicago
2020-2021
Budker Institute of Nuclear Physics
2007-2017
Siberian Branch of the Russian Academy of Sciences
2007-2016
Novosibirsk State University
2007-2015
Russian Academy of Sciences
2002-2015
Institute for Theoretical and Experimental Physics
2010
Institute of Engineering Physics
2003
The Integrable Optics Test Accelerator (IOTA) is a storage ring for advanced beam physics research currently being built and commissioned at Fermilab. It will operate with protons electrons using injectors momenta of 70 150 MeV/c, respectively. program includes the study nonlinear focusing integrable optical lattices based on special magnets electron lenses, dynamics space-charge effects their compensation, stochastic cooling, several other experiments. In this article, we present design...
Using a data sample of 6.8 pb$^{-1}$ collected with the CMD-3 detector at VEPP-2000 $e^+e^-$ collider we select about 2700 events $e^+e^- \to p\bar{p}$ process and measure its cross section 12 energy ponts 6\% systematic uncertainty. From angular distribution produced nucleons obtain ratio $|G_{E}/G_{M}| = 1.49 \pm 0.23 0.30$.
The cross section of the process e+e−→3(π+π−) has been measured using a data sample 22pb−1 collected with CMD-3 detector at VEPP-2000 e+e− collider. 7956 signal events are selected in center-of-mass energy range 1.5–2.0 GeV. exhibits sharp drop near pp¯ threshold. A first study dynamics six-pion production performed.
The cross section for the process e+e- --> omega pi0 gamma has been measured in energy range 1.05--2.00 GeV. experiment performed at collider VEPP-2000 with SND detector. above 1.4 GeV is most accurate to date. Below our data are good agreement previous and CMD-2 measurements. Data on well described by VMD model two excited rho-like states. From we have extracted gamma^* transition form factor. It found that VDM cannot describe simultaneously obtained from mu+ mu- decay. We also tested CVC...
A search for the process $\epem\to \eta^\prime(958)$ in $\pipi\eta\to\pipi\gamma\gamma$ final state has been performed with CMD-3 detector at VEPP-2000 $e^+e^-$ collider. Using an integrated luminosity of 2.69 pb$^{-1}$ collected center-of-mass energy \Ecm = 957.68 MeV we set upper limit product electronic width and branching fractions $\Gamma_{\eta^\prime(958)\to\epem}\cdot\BR_{\eta^\prime(958)\to\pipi\eta}\cdot\BR_{\eta\to\gamma\gamma}<0.00041$ eV 90\% C.L.
The e+e−→ηγ cross section has been measured in the center-of-mass energy range 1.07–2.00 GeV using decay mode η→3π0, π0→γγ. analysis is based on 36 pb−1 of integrated luminosity collected with SND detector at VEPP-2000 e+e− collider. about 40 pb 1.5 explained by decays ρ(1450) and ϕ(1680) resonances.Received 29 December 2013DOI:https://doi.org/10.1103/PhysRevD.90.032002© 2014 American Physical Society
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Generally, turn-to-turn power fluctuations of incoherent spontaneous synchrotron radiation in a storage ring depend on the 6D phase-space distribution electron bunch. In some cases, if only one parameter is unknown, this can be determined from measured magnitude these fluctuations. Letter, we report an absolute measurement (no free parameters or calibration) small vertical emittance (5–15 nm rms) flat beam by method, under conditions, when it unresolvable conventional light size...
In a storage ring, turn-to-turn fluctuations in the intensity of spontaneous synchrotron radiation occur due to two mechanisms. The first mechanism is quantum uncertainty number emitted photons. second variations relative positions classical pointlike electrons bunch. We present unified description both effects framework optics. derive an equation for arbitrary degree coherence, which generalizes previously reported results temporally incoherent radiation. compare predictions our calculation...
Particle accelerators and storage rings have been transformative instruments of discovery, and, for many applications, innovations in particle-beam cooling a principal driver that success1. Beam reduces the spread particle positions momenta, while keeping number particles constant, combats diffusive effects, thereby enabling accumulation production preservation intense beams. In case colliders, increases likelihood observing rare physics events. One most important conceptual technological...
With ever increasing demands for intensities in modern accelerators, the understanding of space-charge effects becomes crucial. Herein are presented measurements optically shaped picosecond-long electron beams a superconducting L-band linac over wide range charges, from 0.2 nC to 3.4 nC. At low shape beam is preserved, while at higher charge densities, modulations on convert energy modulations. Energy profile using spectrometer and time streak camera reveal dynamics longitudinal MeV-scale beams.
We present the results of experimental studies on transverse and longitudinal dynamics a single electron in IOTA storage ring. is flexible machine dedicated to beam physics experiments with electrons protons. A method was developed reliably inject circulate controlled number key diagnostic system set sensitive high-resolution digital cameras for detection synchrotron light emitted by electrons. With 60-130 machine, we measured lifetime derived an absolute calibration optical system. At...
Generally, turn-to-turn fluctuations of synchrotron radiation power in a storage ring depend on the 6D phase-space distribution electron bunch. This effect is related to interference fields radiated by different electrons. Changes relative positions and velocities inside bunch result total emitted energy per pass source. has been previously described assuming constant equal before entering In this paper, we present generalized formula for with non-negligible beam divergence. Further,...
Abstract The electron lens in the Fermilab Integrable Optics Test Accelerator (IOTA) will enable new research nonlinear integrable optics, space-charge compensation, cooling, and stability of intense beams. This addresses scientific questions on high-brightness beams operational challenges high-power accelerators for nuclear particle physics. We review roles that lenses play this field physical principles behind their applications. design criteria specifications IOTA storage ring are then...