S. Belomestnykh
A5070646324- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- Gyrotron and Vacuum Electronics Research
- Magnetic confinement fusion research
- Particle Detector Development and Performance
- Photocathodes and Microchannel Plates
- Particle physics theoretical and experimental studies
- Plasma Diagnostics and Applications
- Microwave Engineering and Waveguides
- International Science and Diplomacy
- Dark Matter and Cosmic Phenomena
- Distributed and Parallel Computing Systems
- Electron and X-Ray Spectroscopy Techniques
- Laser Design and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Superconducting and THz Device Technology
- Laser-Plasma Interactions and Diagnostics
- Atomic and Molecular Physics
- Energy Harvesting in Wireless Networks
- Electromagnetic Launch and Propulsion Technology
- Photonic and Optical Devices
- Physics of Superconductivity and Magnetism
- Atomic and Subatomic Physics Research
- Radiation Therapy and Dosimetry
Fermi National Accelerator Laboratory
2018-2024
Stony Brook University
2013-2024
Brookhaven National Laboratory
2011-2021
Russian Railways
2021
Cornell University
2001-2012
Budker Institute of Nuclear Physics
2002
This report is based on a ten-week program Gluons and the quark sea at high-energies, which took place Institute for Nuclear Theory (INT) in Seattle Fall 2010. The principal aim of was to develop sharpen science case an Electron-Ion Collider (EIC), facility that will be able collide electrons positrons with polarized protons light heavy nuclei high energies, offering unprecedented possibilities in-depth studies quantum chromodynamics (QCD). organized around following four major themes: (i)...
Very-high-quality-factor superconducting radio-frequency cavities developed for accelerators can enable fundamental physics searches with orders of magnitude higher sensitivity, and they also offer a path to 1000-fold increase in the achievable coherence times cavity-stored quantum states three-dimensional circuit QED architecture. Here we report measurements multiple accelerator resonant frequencies ${f}_{0}=1.3$, 2.6, 5 GHz down temperatures about 10 mK field levels few photons, which...
Abstract A multi-TeV muon collider offers a spectacular opportunity in the direct exploration of energy frontier. Offering combination unprecedented collisions comparatively clean leptonic environment, high has unique potential to provide both precision measurements and highest reach one machine that cannot be paralleled by any currently available technology. The topic generated lot excitement Snowmass meetings continues attract large number supporters, including many from early career...
The International Linear Collider (ILC) is on the table now as a new global energy-frontier accelerator laboratory taking data in 2030s. ILC addresses key questions for our current understanding of particle physics. It based proven technology. Its experiments will challenge Standard Model physics and provide window to look beyond it. This document brings story up date, emphasizing its strong motivation, readiness construction, opportunity it presents US community.
We conduct the first "light-shining-through-wall" (LSW) search for dark photons using two state-of-the-art high-quality-factor superconducting radio frequency (SRF) cavities -Dark SRF-and report results of its pathfinder run. Our new experimental setup enables improvements in sensitivity over previous searches and covers photon parameter space. design delicate calibration measurement protocols to utilize high-Q at Dark SRF. Using operating 1.3 GHz, we establish a exclusion limit kinetic...
Continuous-wave photoinjectors operating at high accelerating gradients promise to revolutionize many areas of science and applications. They can establish the basis for a new generation monochromatic x-ray free electron lasers, high-brightness hadron beams, or microchip production. In this Letter we report on record-performing superconducting rf gun with ${\mathrm{CsK}}_{2}\mathrm{Sb}$ photocathode. The is generating charge bunches (up $10\text{ }\text{ }\mathrm{nC}/\text{bunch}$) low...
Abstract High brightness, high charge electron beams are critical for a number of advanced accelerator applications. The initial emittance the beam, which is determined by mean transverse energy (MTE) and laser spot size, one most important parameters determining beam quality. bialkali photocathodes illuminated visible have advantages quantum efficiency (QE) low MTE. Furthermore, Superconducting Radio Frequency (SRF) guns can operate in continuous wave (CW) mode at accelerating gradients,...
To achieve the lowest emittance electron bunches from photoemission guns, it is essential to limit uncorrelated growth due space charge forces acting on bunch in vicinity of photocathode through appropriate temporal shaping optical pulses illuminating photocathode. We present measurements profile a bulk crystal GaAs illuminated with 520 nm wavelength frequency-doubled Yb-fiber laser. A transverse deflecting rf cavity was used make these measurements. The measured laser pulse and...
Cooling of beams gold ions using electron bunches accelerated with radio-frequency systems was recently experimentally demonstrated in the Relativistic Heavy Ion Collider at Brookhaven National Laboratory. Such an approach is new and opens possibility this technique higher energies than possible electrostatic acceleration beams. The challenges include generation suitable for cooling, delivery required quality to cooling sections without degradation beam angular divergence energy spread,...
Quantum information science harnesses the principles of quantum mechanics to realize computational algorithms with complexities vastly intractable by current computer platforms. Typical applications range from chemistry optimization problems and also include simulations for high energy physics. The recent maturing hardware has triggered preliminary explorations several institutions (including Fermilab) capable demonstrating advantage in multiple domains, computing communications, sensing....
This is a Snowmass white paper on the utility of existing and future superconducting cavities to probe fundamental physics. Superconducting radio frequency (SRF) cavity technology has seen tremendous progress in past decades, as tool for accelerator science. With advances spear-headed by SQMS center at Fermilab, they are now being brought quantum regime becoming science thanks high degree coherence. The same quality factor can be leveraged search new physics, including searches particles,...
The Cornell University energy recovery linac (ERL) photoinjector has recently demonstrated operation at 20 mA for approximately 8 hours, utilizing a multialkali photocathode deposited on Si substrate. We describe the recipe deposition, and will detail parameters of run. Post-run analysis indicates presence significant damage to substrate, perhaps due ion back-bombardment from residual beam line gas. While exact cause substrate remains unknown, we multiple surface characterization techniques...
The United States has a rich history in high energy particle accelerators and colliders -- both lepton hadron machines, which have enabled several major discoveries elementary physics. To ensure continued progress the field, U.S. leadership as key partner building next generation collider facilities abroad is essential; also critically important exploring of options to host future "Snowmass" study subsequent Particle Physics Project Prioritization Panel (P5) process provide timely...
Abstract C 3 is an opportunity to realize e + - collider for the study of Higgs boson at √ s = 250 GeV, with a well defined upgrade path 550 GeV while staying on same short facility footprint [2,3]. based fundamentally new approach normal conducting linear accelerators that achieves both high gradient and efficiency relatively low cost. Given advanced state designs, key system requires technical maturation main linac. This paper presents staged towards demonstrate technology Direct (source...
We proposed a novel design for compact superconducting crab cavity with double quarter wave (DQWCC) shape. After fabrication and surface treatments, this niobium proof-of-principle was tested cryogenically in vertical cryostat. The is extremely yet has low frequency of 400 MHz, an essential property service the Large Hadron Collider luminosity upgrade. cavity's electromagnetic properties are well suited demanding task. demonstrated deflecting voltage 4.6 MV above required 3.34 future High...
C$^3$ is an opportunity to realize e$^+$e$^-$ collider for the study of Higgs boson at $\sqrt{s} = 250$ GeV, with a well defined upgrade path 550 GeV while staying on same short facility footprint. based fundamentally new approach normal conducting linear accelerators that achieves both high gradient and efficiency relatively low cost. Given advanced state designs, key system requires technical maturation main linac. This white paper presents staged towards demonstrate technology Direct...
This article addresses the physics and engineering of superconducting radio-frequency systems for high-β particle accelerators. I consider different geometries cavities, discuss criteria optimization, options higher-order mode damping. In reviewing recent progress in field, SRF are classified according to functions they perform. These fundamental RF accelerating systems, deflecting/crab harmonic photoemission electron guns.
A half-cell superconducting rf electron gun is designed to provide 0.5 A, 2 MeV beam for the Brookhaven National Laboratory R Energy Recovery Linac. Total power of 1 MW must be delivered meet current and energy specifications, resulting in very strong coupling. Two opposing fundamental couplers (FPCs) are employed minimize transverse kick traversing structure halve through coupler. single-window coaxial coupler has been average coupling requirements. The features a planar beryllia window...
For the ERL injector, superconducting cavities are needed to deliver beam a 100 kWCW RF power. With current of 100...33 mA, gap voltage 1...3 MV, coupler must have an external g-factor in range 4.6/spl times/10/sup 4/...4.1/spl 5/. The cavity shape and design presented provide possibility working parameters without substantial transverse kick HOM-losses system. In order preserve field flatness while dipole mode is driven out, 2-cell has protruding iris between cell larger pipe. A...
The numerous parasitic encounters near interaction points of some particle colliders can be mitigated by introducing a crossing angle between beams. However, the lowers luminosity due to reduced geometric overlap bunches. Crab cavities allow restoring head-on collisions at point, thus increasing luminosity. also offer mechanism for leveling. KEKB was first facility implement crab technique in 2007, electron and positron High Luminosity Large Hadron Collider (HL-LHC) project envisages use...
Synchrotron light sources based on Energy Recovery Linacs (ERLs) show promise to deliver X-ray beams with both brilliance and pulse duration far superior the values that can be achieved storage ring technology. Cornell University, in collaboration Jefferson Laboratory, has proposed construction of a prototype ERL. This 100MeV, 100mA CW superconducting electron accelerator will used study resolve many physics technology issues this type machine. These studies are essential before ERLs...
The superconducting cavities in an Energy-Recovery-Linac will be operated with a high loaded Q of several 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">7</sup> , possible up to xmlns:xlink="http://www.w3.org/1999/xlink">8</sup> . Not only has no prior control system ever stabilized the RF field elliptical linac cavity such Q, but also highest stability amplitude and phase is required at this Q. Because resulting bandwidth few Hz, presents...